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/**
******************************************************************************
* @file stm32f4xx_hal_i2c.c
* @author MCD Application Team
* @brief I2C HAL module driver.
* This file provides firmware functions to manage the following
* functionalities of the Inter Integrated Circuit (I2C) peripheral:
* + Initialization and de-initialization functions
* + IO operation functions
* + Peripheral State, Mode and Error functions
*
@verbatim
==============================================================================
##### How to use this driver #####
==============================================================================
[..]
The I2C HAL driver can be used as follows:
(#) Declare a I2C_HandleTypeDef handle structure, for example:
I2C_HandleTypeDef hi2c;
(#)Initialize the I2C low level resources by implementing the HAL_I2C_MspInit() API:
(##) Enable the I2Cx interface clock
(##) I2C pins configuration
(+++) Enable the clock for the I2C GPIOs
(+++) Configure I2C pins as alternate function open-drain
(##) NVIC configuration if you need to use interrupt process
(+++) Configure the I2Cx interrupt priority
(+++) Enable the NVIC I2C IRQ Channel
(##) DMA Configuration if you need to use DMA process
(+++) Declare a DMA_HandleTypeDef handle structure for the transmit or receive stream
(+++) Enable the DMAx interface clock using
(+++) Configure the DMA handle parameters
(+++) Configure the DMA Tx or Rx stream
(+++) Associate the initialized DMA handle to the hi2c DMA Tx or Rx handle
(+++) Configure the priority and enable the NVIC for the transfer complete interrupt on
the DMA Tx or Rx stream
(#) Configure the Communication Speed, Duty cycle, Addressing mode, Own Address1,
Dual Addressing mode, Own Address2, General call and Nostretch mode in the hi2c Init structure.
(#) Initialize the I2C registers by calling the HAL_I2C_Init(), configures also the low level Hardware
(GPIO, CLOCK, NVIC...etc) by calling the customized HAL_I2C_MspInit() API.
(#) To check if target device is ready for communication, use the function HAL_I2C_IsDeviceReady()
(#) For I2C IO and IO MEM operations, three operation modes are available within this driver :
*** Polling mode IO operation ***
=================================
[..]
(+) Transmit in master mode an amount of data in blocking mode using HAL_I2C_Master_Transmit()
(+) Receive in master mode an amount of data in blocking mode using HAL_I2C_Master_Receive()
(+) Transmit in slave mode an amount of data in blocking mode using HAL_I2C_Slave_Transmit()
(+) Receive in slave mode an amount of data in blocking mode using HAL_I2C_Slave_Receive()
*** Polling mode IO MEM operation ***
=====================================
[..]
(+) Write an amount of data in blocking mode to a specific memory address using HAL_I2C_Mem_Write()
(+) Read an amount of data in blocking mode from a specific memory address using HAL_I2C_Mem_Read()
*** Interrupt mode IO operation ***
===================================
[..]
(+) Transmit in master mode an amount of data in non-blocking mode using HAL_I2C_Master_Transmit_IT()
(+) At transmission end of transfer, HAL_I2C_MasterTxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback()
(+) Receive in master mode an amount of data in non-blocking mode using HAL_I2C_Master_Receive_IT()
(+) At reception end of transfer, HAL_I2C_MasterRxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback()
(+) Transmit in slave mode an amount of data in non-blocking mode using HAL_I2C_Slave_Transmit_IT()
(+) At transmission end of transfer, HAL_I2C_SlaveTxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback()
(+) Receive in slave mode an amount of data in non-blocking mode using HAL_I2C_Slave_Receive_IT()
(+) At reception end of transfer, HAL_I2C_SlaveRxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback()
(+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_I2C_ErrorCallback()
(+) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
(+) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
*** Interrupt mode or DMA mode IO sequential operation ***
==========================================================
[..]
(@) These interfaces allow to manage a sequential transfer with a repeated start condition
when a direction change during transfer
[..]
(+) A specific option field manage the different steps of a sequential transfer
(+) Option field values are defined through I2C_XferOptions_definition and are listed below:
(++) I2C_FIRST_AND_LAST_FRAME: No sequential usage, functional is same as associated interfaces in no sequential mode
(++) I2C_FIRST_FRAME: Sequential usage, this option allow to manage a sequence with start condition, address
and data to transfer without a final stop condition
(++) I2C_FIRST_AND_NEXT_FRAME: Sequential usage (Master only), this option allow to manage a sequence with start condition, address
and data to transfer without a final stop condition, an then permit a call the same master sequential interface
several times (like HAL_I2C_Master_Seq_Transmit_IT() then HAL_I2C_Master_Seq_Transmit_IT()
or HAL_I2C_Master_Seq_Transmit_DMA() then HAL_I2C_Master_Seq_Transmit_DMA())
(++) I2C_NEXT_FRAME: Sequential usage, this option allow to manage a sequence with a restart condition, address
and with new data to transfer if the direction change or manage only the new data to transfer
if no direction change and without a final stop condition in both cases
(++) I2C_LAST_FRAME: Sequential usage, this option allow to manage a sequance with a restart condition, address
and with new data to transfer if the direction change or manage only the new data to transfer
if no direction change and with a final stop condition in both cases
(++) I2C_LAST_FRAME_NO_STOP: Sequential usage (Master only), this option allow to manage a restart condition after several call of the same master sequential
interface several times (link with option I2C_FIRST_AND_NEXT_FRAME).
Usage can, transfer several bytes one by one using HAL_I2C_Master_Seq_Transmit_IT(option I2C_FIRST_AND_NEXT_FRAME then I2C_NEXT_FRAME)
or HAL_I2C_Master_Seq_Receive_IT(option I2C_FIRST_AND_NEXT_FRAME then I2C_NEXT_FRAME)
or HAL_I2C_Master_Seq_Transmit_DMA(option I2C_FIRST_AND_NEXT_FRAME then I2C_NEXT_FRAME)
or HAL_I2C_Master_Seq_Receive_DMA(option I2C_FIRST_AND_NEXT_FRAME then I2C_NEXT_FRAME).
Then usage of this option I2C_LAST_FRAME_NO_STOP at the last Transmit or Receive sequence permit to call the opposite interface Receive or Transmit
without stopping the communication and so generate a restart condition.
(++) I2C_OTHER_FRAME: Sequential usage (Master only), this option allow to manage a restart condition after each call of the same master sequential
interface.
Usage can, transfer several bytes one by one with a restart with slave address between each bytes using HAL_I2C_Master_Seq_Transmit_IT(option I2C_FIRST_FRAME then I2C_OTHER_FRAME)
or HAL_I2C_Master_Seq_Receive_IT(option I2C_FIRST_FRAME then I2C_OTHER_FRAME)
or HAL_I2C_Master_Seq_Transmit_DMA(option I2C_FIRST_FRAME then I2C_OTHER_FRAME)
or HAL_I2C_Master_Seq_Receive_DMA(option I2C_FIRST_FRAME then I2C_OTHER_FRAME).
Then usage of this option I2C_OTHER_AND_LAST_FRAME at the last frame to help automatic generation of STOP condition.
(+) Different sequential I2C interfaces are listed below:
(++) Sequential transmit in master I2C mode an amount of data in non-blocking mode using HAL_I2C_Master_Seq_Transmit_IT()
or using HAL_I2C_Master_Seq_Transmit_DMA()
(+++) At transmission end of current frame transfer, HAL_I2C_MasterTxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback()
(++) Sequential receive in master I2C mode an amount of data in non-blocking mode using HAL_I2C_Master_Seq_Receive_IT()
or using HAL_I2C_Master_Seq_Receive_DMA()
(+++) At reception end of current frame transfer, HAL_I2C_MasterRxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback()
(++) Abort a master IT or DMA I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
(+++) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
(++) Enable/disable the Address listen mode in slave I2C mode using HAL_I2C_EnableListen_IT() HAL_I2C_DisableListen_IT()
(+++) When address slave I2C match, HAL_I2C_AddrCallback() is executed and user can
add his own code to check the Address Match Code and the transmission direction request by master (Write/Read).
(+++) At Listen mode end HAL_I2C_ListenCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_ListenCpltCallback()
(++) Sequential transmit in slave I2C mode an amount of data in non-blocking mode using HAL_I2C_Slave_Seq_Transmit_IT()
or using HAL_I2C_Slave_Seq_Transmit_DMA()
(+++) At transmission end of current frame transfer, HAL_I2C_SlaveTxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback()
(++) Sequential receive in slave I2C mode an amount of data in non-blocking mode using HAL_I2C_Slave_Seq_Receive_IT()
or using HAL_I2C_Slave_Seq_Receive_DMA()
(+++) At reception end of current frame transfer, HAL_I2C_SlaveRxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback()
(++) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_I2C_ErrorCallback()
*** Interrupt mode IO MEM operation ***
=======================================
[..]
(+) Write an amount of data in non-blocking mode with Interrupt to a specific memory address using
HAL_I2C_Mem_Write_IT()
(+) At Memory end of write transfer, HAL_I2C_MemTxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MemTxCpltCallback()
(+) Read an amount of data in non-blocking mode with Interrupt from a specific memory address using
HAL_I2C_Mem_Read_IT()
(+) At Memory end of read transfer, HAL_I2C_MemRxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MemRxCpltCallback()
(+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_I2C_ErrorCallback()
*** DMA mode IO operation ***
==============================
[..]
(+) Transmit in master mode an amount of data in non-blocking mode (DMA) using
HAL_I2C_Master_Transmit_DMA()
(+) At transmission end of transfer, HAL_I2C_MasterTxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback()
(+) Receive in master mode an amount of data in non-blocking mode (DMA) using
HAL_I2C_Master_Receive_DMA()
(+) At reception end of transfer, HAL_I2C_MasterRxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback()
(+) Transmit in slave mode an amount of data in non-blocking mode (DMA) using
HAL_I2C_Slave_Transmit_DMA()
(+) At transmission end of transfer, HAL_I2C_SlaveTxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback()
(+) Receive in slave mode an amount of data in non-blocking mode (DMA) using
HAL_I2C_Slave_Receive_DMA()
(+) At reception end of transfer, HAL_I2C_SlaveRxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback()
(+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_I2C_ErrorCallback()
(+) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
(+) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
*** DMA mode IO MEM operation ***
=================================
[..]
(+) Write an amount of data in non-blocking mode with DMA to a specific memory address using
HAL_I2C_Mem_Write_DMA()
(+) At Memory end of write transfer, HAL_I2C_MemTxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MemTxCpltCallback()
(+) Read an amount of data in non-blocking mode with DMA from a specific memory address using
HAL_I2C_Mem_Read_DMA()
(+) At Memory end of read transfer, HAL_I2C_MemRxCpltCallback() is executed and user can
add his own code by customization of function pointer HAL_I2C_MemRxCpltCallback()
(+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_I2C_ErrorCallback()
*** I2C HAL driver macros list ***
==================================
[..]
Below the list of most used macros in I2C HAL driver.
(+) __HAL_I2C_ENABLE: Enable the I2C peripheral
(+) __HAL_I2C_DISABLE: Disable the I2C peripheral
(+) __HAL_I2C_GET_FLAG: Checks whether the specified I2C flag is set or not
(+) __HAL_I2C_CLEAR_FLAG: Clear the specified I2C pending flag
(+) __HAL_I2C_ENABLE_IT: Enable the specified I2C interrupt
(+) __HAL_I2C_DISABLE_IT: Disable the specified I2C interrupt
*** Callback registration ***
=============================================
[..]
The compilation flag USE_HAL_I2C_REGISTER_CALLBACKS when set to 1
allows the user to configure dynamically the driver callbacks.
Use Functions HAL_I2C_RegisterCallback() or HAL_I2C_RegisterAddrCallback()
to register an interrupt callback.
[..]
Function HAL_I2C_RegisterCallback() allows to register following callbacks:
(+) MasterTxCpltCallback : callback for Master transmission end of transfer.
(+) MasterRxCpltCallback : callback for Master reception end of transfer.
(+) SlaveTxCpltCallback : callback for Slave transmission end of transfer.
(+) SlaveRxCpltCallback : callback for Slave reception end of transfer.
(+) ListenCpltCallback : callback for end of listen mode.
(+) MemTxCpltCallback : callback for Memory transmission end of transfer.
(+) MemRxCpltCallback : callback for Memory reception end of transfer.
(+) ErrorCallback : callback for error detection.
(+) AbortCpltCallback : callback for abort completion process.
(+) MspInitCallback : callback for Msp Init.
(+) MspDeInitCallback : callback for Msp DeInit.
This function takes as parameters the HAL peripheral handle, the Callback ID
and a pointer to the user callback function.
[..]
For specific callback AddrCallback use dedicated register callbacks : HAL_I2C_RegisterAddrCallback().
[..]
Use function HAL_I2C_UnRegisterCallback to reset a callback to the default
weak function.
HAL_I2C_UnRegisterCallback takes as parameters the HAL peripheral handle,
and the Callback ID.
This function allows to reset following callbacks:
(+) MasterTxCpltCallback : callback for Master transmission end of transfer.
(+) MasterRxCpltCallback : callback for Master reception end of transfer.
(+) SlaveTxCpltCallback : callback for Slave transmission end of transfer.
(+) SlaveRxCpltCallback : callback for Slave reception end of transfer.
(+) ListenCpltCallback : callback for end of listen mode.
(+) MemTxCpltCallback : callback for Memory transmission end of transfer.
(+) MemRxCpltCallback : callback for Memory reception end of transfer.
(+) ErrorCallback : callback for error detection.
(+) AbortCpltCallback : callback for abort completion process.
(+) MspInitCallback : callback for Msp Init.
(+) MspDeInitCallback : callback for Msp DeInit.
[..]
For callback AddrCallback use dedicated register callbacks : HAL_I2C_UnRegisterAddrCallback().
[..]
By default, after the HAL_I2C_Init() and when the state is HAL_I2C_STATE_RESET
all callbacks are set to the corresponding weak functions:
examples HAL_I2C_MasterTxCpltCallback(), HAL_I2C_MasterRxCpltCallback().
Exception done for MspInit and MspDeInit functions that are
reset to the legacy weak functions in the HAL_I2C_Init()/ HAL_I2C_DeInit() only when
these callbacks are null (not registered beforehand).
If MspInit or MspDeInit are not null, the HAL_I2C_Init()/ HAL_I2C_DeInit()
keep and use the user MspInit/MspDeInit callbacks (registered beforehand) whatever the state.
[..]
Callbacks can be registered/unregistered in HAL_I2C_STATE_READY state only.
Exception done MspInit/MspDeInit functions that can be registered/unregistered
in HAL_I2C_STATE_READY or HAL_I2C_STATE_RESET state,
thus registered (user) MspInit/DeInit callbacks can be used during the Init/DeInit.
Then, the user first registers the MspInit/MspDeInit user callbacks
using HAL_I2C_RegisterCallback() before calling HAL_I2C_DeInit()
or HAL_I2C_Init() function.
[..]
When the compilation flag USE_HAL_I2C_REGISTER_CALLBACKS is set to 0 or
not defined, the callback registration feature is not available and all callbacks
are set to the corresponding weak functions.
[..]
(@) You can refer to the I2C HAL driver header file for more useful macros
@endverbatim
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
/** @addtogroup STM32F4xx_HAL_Driver
* @{
*/
/** @defgroup I2C I2C
* @brief I2C HAL module driver
* @{
*/
#ifdef HAL_I2C_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @addtogroup I2C_Private_Define
* @{
*/
#define I2C_TIMEOUT_FLAG 35U /*!< Timeout 35 ms */
#define I2C_TIMEOUT_BUSY_FLAG 25U /*!< Timeout 25 ms */
#define I2C_TIMEOUT_STOP_FLAG 5U /*!< Timeout 5 ms */
#define I2C_NO_OPTION_FRAME 0xFFFF0000U /*!< XferOptions default value */
/* Private define for @ref PreviousState usage */
#define I2C_STATE_MSK ((uint32_t)((uint32_t)((uint32_t)HAL_I2C_STATE_BUSY_TX | (uint32_t)HAL_I2C_STATE_BUSY_RX) & (uint32_t)(~((uint32_t)HAL_I2C_STATE_READY)))) /*!< Mask State define, keep only RX and TX bits */
#define I2C_STATE_NONE ((uint32_t)(HAL_I2C_MODE_NONE)) /*!< Default Value */
#define I2C_STATE_MASTER_BUSY_TX ((uint32_t)(((uint32_t)HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | (uint32_t)HAL_I2C_MODE_MASTER)) /*!< Master Busy TX, combinaison of State LSB and Mode enum */
#define I2C_STATE_MASTER_BUSY_RX ((uint32_t)(((uint32_t)HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | (uint32_t)HAL_I2C_MODE_MASTER)) /*!< Master Busy RX, combinaison of State LSB and Mode enum */
#define I2C_STATE_SLAVE_BUSY_TX ((uint32_t)(((uint32_t)HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | (uint32_t)HAL_I2C_MODE_SLAVE)) /*!< Slave Busy TX, combinaison of State LSB and Mode enum */
#define I2C_STATE_SLAVE_BUSY_RX ((uint32_t)(((uint32_t)HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | (uint32_t)HAL_I2C_MODE_SLAVE)) /*!< Slave Busy RX, combinaison of State LSB and Mode enum */
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup I2C_Private_Functions I2C Private Functions
* @{
*/
/* Private functions to handle DMA transfer */
static void I2C_DMAXferCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMAError(DMA_HandleTypeDef *hdma);
static void I2C_DMAAbort(DMA_HandleTypeDef *hdma);
static void I2C_ITError(I2C_HandleTypeDef *hi2c);
static HAL_StatusTypeDef I2C_MasterRequestWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_MasterRequestRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_RequestMemoryWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_RequestMemoryRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart);
/* Private functions to handle flags during polling transfer */
static HAL_StatusTypeDef I2C_WaitOnFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, FlagStatus Status, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnMasterAddressFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnTXEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnBTFFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnRXNEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnSTOPFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnSTOPRequestThroughIT(I2C_HandleTypeDef *hi2c);
static HAL_StatusTypeDef I2C_IsAcknowledgeFailed(I2C_HandleTypeDef *hi2c);
/* Private functions for I2C transfer IRQ handler */
static void I2C_MasterTransmit_TXE(I2C_HandleTypeDef *hi2c);
static void I2C_MasterTransmit_BTF(I2C_HandleTypeDef *hi2c);
static void I2C_MasterReceive_RXNE(I2C_HandleTypeDef *hi2c);
static void I2C_MasterReceive_BTF(I2C_HandleTypeDef *hi2c);
static void I2C_Master_SB(I2C_HandleTypeDef *hi2c);
static void I2C_Master_ADD10(I2C_HandleTypeDef *hi2c);
static void I2C_Master_ADDR(I2C_HandleTypeDef *hi2c);
static void I2C_SlaveTransmit_TXE(I2C_HandleTypeDef *hi2c);
static void I2C_SlaveTransmit_BTF(I2C_HandleTypeDef *hi2c);
static void I2C_SlaveReceive_RXNE(I2C_HandleTypeDef *hi2c);
static void I2C_SlaveReceive_BTF(I2C_HandleTypeDef *hi2c);
static void I2C_Slave_ADDR(I2C_HandleTypeDef *hi2c, uint32_t IT2Flags);
static void I2C_Slave_STOPF(I2C_HandleTypeDef *hi2c);
static void I2C_Slave_AF(I2C_HandleTypeDef *hi2c);
static void I2C_MemoryTransmit_TXE_BTF(I2C_HandleTypeDef *hi2c);
/* Private function to Convert Specific options */
static void I2C_ConvertOtherXferOptions(I2C_HandleTypeDef *hi2c);
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup I2C_Exported_Functions I2C Exported Functions
* @{
*/
/** @defgroup I2C_Exported_Functions_Group1 Initialization and de-initialization functions
* @brief Initialization and Configuration functions
*
@verbatim
===============================================================================
##### Initialization and de-initialization functions #####
===============================================================================
[..] This subsection provides a set of functions allowing to initialize and
deinitialize the I2Cx peripheral:
(+) User must Implement HAL_I2C_MspInit() function in which he configures
all related peripherals resources (CLOCK, GPIO, DMA, IT and NVIC).
(+) Call the function HAL_I2C_Init() to configure the selected device with
the selected configuration:
(++) Communication Speed
(++) Duty cycle
(++) Addressing mode
(++) Own Address 1
(++) Dual Addressing mode
(++) Own Address 2
(++) General call mode
(++) Nostretch mode
(+) Call the function HAL_I2C_DeInit() to restore the default configuration
of the selected I2Cx peripheral.
@endverbatim
* @{
*/
/**
* @brief Initializes the I2C according to the specified parameters
* in the I2C_InitTypeDef and initialize the associated handle.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Init(I2C_HandleTypeDef *hi2c)
{
uint32_t freqrange;
uint32_t pclk1;
/* Check the I2C handle allocation */
if (hi2c == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
assert_param(IS_I2C_CLOCK_SPEED(hi2c->Init.ClockSpeed));
assert_param(IS_I2C_DUTY_CYCLE(hi2c->Init.DutyCycle));
assert_param(IS_I2C_OWN_ADDRESS1(hi2c->Init.OwnAddress1));
assert_param(IS_I2C_ADDRESSING_MODE(hi2c->Init.AddressingMode));
assert_param(IS_I2C_DUAL_ADDRESS(hi2c->Init.DualAddressMode));
assert_param(IS_I2C_OWN_ADDRESS2(hi2c->Init.OwnAddress2));
assert_param(IS_I2C_GENERAL_CALL(hi2c->Init.GeneralCallMode));
assert_param(IS_I2C_NO_STRETCH(hi2c->Init.NoStretchMode));
if (hi2c->State == HAL_I2C_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hi2c->Lock = HAL_UNLOCKED;
#if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
/* Init the I2C Callback settings */
hi2c->MasterTxCpltCallback = HAL_I2C_MasterTxCpltCallback; /* Legacy weak MasterTxCpltCallback */
hi2c->MasterRxCpltCallback = HAL_I2C_MasterRxCpltCallback; /* Legacy weak MasterRxCpltCallback */
hi2c->SlaveTxCpltCallback = HAL_I2C_SlaveTxCpltCallback; /* Legacy weak SlaveTxCpltCallback */
hi2c->SlaveRxCpltCallback = HAL_I2C_SlaveRxCpltCallback; /* Legacy weak SlaveRxCpltCallback */
hi2c->ListenCpltCallback = HAL_I2C_ListenCpltCallback; /* Legacy weak ListenCpltCallback */
hi2c->MemTxCpltCallback = HAL_I2C_MemTxCpltCallback; /* Legacy weak MemTxCpltCallback */
hi2c->MemRxCpltCallback = HAL_I2C_MemRxCpltCallback; /* Legacy weak MemRxCpltCallback */
hi2c->ErrorCallback = HAL_I2C_ErrorCallback; /* Legacy weak ErrorCallback */
hi2c->AbortCpltCallback = HAL_I2C_AbortCpltCallback; /* Legacy weak AbortCpltCallback */
hi2c->AddrCallback = HAL_I2C_AddrCallback; /* Legacy weak AddrCallback */
if (hi2c->MspInitCallback == NULL)
{
hi2c->MspInitCallback = HAL_I2C_MspInit; /* Legacy weak MspInit */
}
/* Init the low level hardware : GPIO, CLOCK, NVIC */
hi2c->MspInitCallback(hi2c);
#else
/* Init the low level hardware : GPIO, CLOCK, NVIC */
HAL_I2C_MspInit(hi2c);
#endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
}
hi2c->State = HAL_I2C_STATE_BUSY;
/* Disable the selected I2C peripheral */
__HAL_I2C_DISABLE(hi2c);
/*Reset I2C*/
hi2c->Instance->CR1 |= I2C_CR1_SWRST;
hi2c->Instance->CR1 &= ~I2C_CR1_SWRST;
/* Get PCLK1 frequency */
pclk1 = HAL_RCC_GetPCLK1Freq();
/* Check the minimum allowed PCLK1 frequency */
if (I2C_MIN_PCLK_FREQ(pclk1, hi2c->Init.ClockSpeed) == 1U)
{
return HAL_ERROR;
}
/* Calculate frequency range */
freqrange = I2C_FREQRANGE(pclk1);
/*---------------------------- I2Cx CR2 Configuration ----------------------*/
/* Configure I2Cx: Frequency range */
MODIFY_REG(hi2c->Instance->CR2, I2C_CR2_FREQ, freqrange);
/*---------------------------- I2Cx TRISE Configuration --------------------*/
/* Configure I2Cx: Rise Time */
MODIFY_REG(hi2c->Instance->TRISE, I2C_TRISE_TRISE, I2C_RISE_TIME(freqrange, hi2c->Init.ClockSpeed));
/*---------------------------- I2Cx CCR Configuration ----------------------*/
/* Configure I2Cx: Speed */
MODIFY_REG(hi2c->Instance->CCR, (I2C_CCR_FS | I2C_CCR_DUTY | I2C_CCR_CCR), I2C_SPEED(pclk1, hi2c->Init.ClockSpeed, hi2c->Init.DutyCycle));
/*---------------------------- I2Cx CR1 Configuration ----------------------*/
/* Configure I2Cx: Generalcall and NoStretch mode */
MODIFY_REG(hi2c->Instance->CR1, (I2C_CR1_ENGC | I2C_CR1_NOSTRETCH), (hi2c->Init.GeneralCallMode | hi2c->Init.NoStretchMode));
/*---------------------------- I2Cx OAR1 Configuration ---------------------*/
/* Configure I2Cx: Own Address1 and addressing mode */
MODIFY_REG(hi2c->Instance->OAR1, (I2C_OAR1_ADDMODE | I2C_OAR1_ADD8_9 | I2C_OAR1_ADD1_7 | I2C_OAR1_ADD0), (hi2c->Init.AddressingMode | hi2c->Init.OwnAddress1));
/*---------------------------- I2Cx OAR2 Configuration ---------------------*/
/* Configure I2Cx: Dual mode and Own Address2 */
MODIFY_REG(hi2c->Instance->OAR2, (I2C_OAR2_ENDUAL | I2C_OAR2_ADD2), (hi2c->Init.DualAddressMode | hi2c->Init.OwnAddress2));
/* Enable the selected I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->Mode = HAL_I2C_MODE_NONE;
return HAL_OK;
}
/**
* @brief DeInitialize the I2C peripheral.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_DeInit(I2C_HandleTypeDef *hi2c)
{
/* Check the I2C handle allocation */
if (hi2c == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
hi2c->State = HAL_I2C_STATE_BUSY;
/* Disable the I2C Peripheral Clock */
__HAL_I2C_DISABLE(hi2c);
#if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
if (hi2c->MspDeInitCallback == NULL)
{
hi2c->MspDeInitCallback = HAL_I2C_MspDeInit; /* Legacy weak MspDeInit */
}
/* DeInit the low level hardware: GPIO, CLOCK, NVIC */
hi2c->MspDeInitCallback(hi2c);
#else
/* DeInit the low level hardware: GPIO, CLOCK, NVIC */
HAL_I2C_MspDeInit(hi2c);
#endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
hi2c->State = HAL_I2C_STATE_RESET;
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Release Lock */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
/**
* @brief Initialize the I2C MSP.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval None
*/
__weak void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hi2c);
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_I2C_MspInit could be implemented in the user file
*/
}
/**
* @brief DeInitialize the I2C MSP.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval None
*/
__weak void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hi2c);
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_I2C_MspDeInit could be implemented in the user file
*/
}
#if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
/**
* @brief Register a User I2C Callback
* To be used instead of the weak predefined callback
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param CallbackID ID of the callback to be registered
* This parameter can be one of the following values:
* @arg @ref HAL_I2C_MASTER_TX_COMPLETE_CB_ID Master Tx Transfer completed callback ID
* @arg @ref HAL_I2C_MASTER_RX_COMPLETE_CB_ID Master Rx Transfer completed callback ID
* @arg @ref HAL_I2C_SLAVE_TX_COMPLETE_CB_ID Slave Tx Transfer completed callback ID
* @arg @ref HAL_I2C_SLAVE_RX_COMPLETE_CB_ID Slave Rx Transfer completed callback ID
* @arg @ref HAL_I2C_LISTEN_COMPLETE_CB_ID Listen Complete callback ID
* @arg @ref HAL_I2C_MEM_TX_COMPLETE_CB_ID Memory Tx Transfer callback ID
* @arg @ref HAL_I2C_MEM_RX_COMPLETE_CB_ID Memory Rx Transfer completed callback ID
* @arg @ref HAL_I2C_ERROR_CB_ID Error callback ID
* @arg @ref HAL_I2C_ABORT_CB_ID Abort callback ID
* @arg @ref HAL_I2C_MSPINIT_CB_ID MspInit callback ID
* @arg @ref HAL_I2C_MSPDEINIT_CB_ID MspDeInit callback ID
* @param pCallback pointer to the Callback function
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_RegisterCallback(I2C_HandleTypeDef *hi2c, HAL_I2C_CallbackIDTypeDef CallbackID, pI2C_CallbackTypeDef pCallback)
{
HAL_StatusTypeDef status = HAL_OK;
if (pCallback == NULL)
{
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
return HAL_ERROR;
}
/* Process locked */
__HAL_LOCK(hi2c);
if (HAL_I2C_STATE_READY == hi2c->State)
{
switch (CallbackID)
{
case HAL_I2C_MASTER_TX_COMPLETE_CB_ID :
hi2c->MasterTxCpltCallback = pCallback;
break;
case HAL_I2C_MASTER_RX_COMPLETE_CB_ID :
hi2c->MasterRxCpltCallback = pCallback;
break;
case HAL_I2C_SLAVE_TX_COMPLETE_CB_ID :
hi2c->SlaveTxCpltCallback = pCallback;
break;
case HAL_I2C_SLAVE_RX_COMPLETE_CB_ID :
hi2c->SlaveRxCpltCallback = pCallback;
break;
case HAL_I2C_LISTEN_COMPLETE_CB_ID :
hi2c->ListenCpltCallback = pCallback;
break;
case HAL_I2C_MEM_TX_COMPLETE_CB_ID :
hi2c->MemTxCpltCallback = pCallback;
break;
case HAL_I2C_MEM_RX_COMPLETE_CB_ID :
hi2c->MemRxCpltCallback = pCallback;
break;
case HAL_I2C_ERROR_CB_ID :
hi2c->ErrorCallback = pCallback;
break;
case HAL_I2C_ABORT_CB_ID :
hi2c->AbortCpltCallback = pCallback;
break;
case HAL_I2C_MSPINIT_CB_ID :
hi2c->MspInitCallback = pCallback;
break;
case HAL_I2C_MSPDEINIT_CB_ID :
hi2c->MspDeInitCallback = pCallback;
break;
default :
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else if (HAL_I2C_STATE_RESET == hi2c->State)
{
switch (CallbackID)
{
case HAL_I2C_MSPINIT_CB_ID :
hi2c->MspInitCallback = pCallback;
break;
case HAL_I2C_MSPDEINIT_CB_ID :
hi2c->MspDeInitCallback = pCallback;
break;
default :
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else
{
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(hi2c);
return status;
}
/**
* @brief Unregister an I2C Callback
* I2C callback is redirected to the weak predefined callback
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param CallbackID ID of the callback to be unregistered
* This parameter can be one of the following values:
* This parameter can be one of the following values:
* @arg @ref HAL_I2C_MASTER_TX_COMPLETE_CB_ID Master Tx Transfer completed callback ID
* @arg @ref HAL_I2C_MASTER_RX_COMPLETE_CB_ID Master Rx Transfer completed callback ID
* @arg @ref HAL_I2C_SLAVE_TX_COMPLETE_CB_ID Slave Tx Transfer completed callback ID
* @arg @ref HAL_I2C_SLAVE_RX_COMPLETE_CB_ID Slave Rx Transfer completed callback ID
* @arg @ref HAL_I2C_LISTEN_COMPLETE_CB_ID Listen Complete callback ID
* @arg @ref HAL_I2C_MEM_TX_COMPLETE_CB_ID Memory Tx Transfer callback ID
* @arg @ref HAL_I2C_MEM_RX_COMPLETE_CB_ID Memory Rx Transfer completed callback ID
* @arg @ref HAL_I2C_ERROR_CB_ID Error callback ID
* @arg @ref HAL_I2C_ABORT_CB_ID Abort callback ID
* @arg @ref HAL_I2C_MSPINIT_CB_ID MspInit callback ID
* @arg @ref HAL_I2C_MSPDEINIT_CB_ID MspDeInit callback ID
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_UnRegisterCallback(I2C_HandleTypeDef *hi2c, HAL_I2C_CallbackIDTypeDef CallbackID)
{
HAL_StatusTypeDef status = HAL_OK;
/* Process locked */
__HAL_LOCK(hi2c);
if (HAL_I2C_STATE_READY == hi2c->State)
{
switch (CallbackID)
{
case HAL_I2C_MASTER_TX_COMPLETE_CB_ID :
hi2c->MasterTxCpltCallback = HAL_I2C_MasterTxCpltCallback; /* Legacy weak MasterTxCpltCallback */
break;
case HAL_I2C_MASTER_RX_COMPLETE_CB_ID :
hi2c->MasterRxCpltCallback = HAL_I2C_MasterRxCpltCallback; /* Legacy weak MasterRxCpltCallback */
break;
case HAL_I2C_SLAVE_TX_COMPLETE_CB_ID :
hi2c->SlaveTxCpltCallback = HAL_I2C_SlaveTxCpltCallback; /* Legacy weak SlaveTxCpltCallback */
break;
case HAL_I2C_SLAVE_RX_COMPLETE_CB_ID :
hi2c->SlaveRxCpltCallback = HAL_I2C_SlaveRxCpltCallback; /* Legacy weak SlaveRxCpltCallback */
break;
case HAL_I2C_LISTEN_COMPLETE_CB_ID :
hi2c->ListenCpltCallback = HAL_I2C_ListenCpltCallback; /* Legacy weak ListenCpltCallback */
break;
case HAL_I2C_MEM_TX_COMPLETE_CB_ID :
hi2c->MemTxCpltCallback = HAL_I2C_MemTxCpltCallback; /* Legacy weak MemTxCpltCallback */
break;
case HAL_I2C_MEM_RX_COMPLETE_CB_ID :
hi2c->MemRxCpltCallback = HAL_I2C_MemRxCpltCallback; /* Legacy weak MemRxCpltCallback */
break;
case HAL_I2C_ERROR_CB_ID :
hi2c->ErrorCallback = HAL_I2C_ErrorCallback; /* Legacy weak ErrorCallback */
break;
case HAL_I2C_ABORT_CB_ID :
hi2c->AbortCpltCallback = HAL_I2C_AbortCpltCallback; /* Legacy weak AbortCpltCallback */
break;
case HAL_I2C_MSPINIT_CB_ID :
hi2c->MspInitCallback = HAL_I2C_MspInit; /* Legacy weak MspInit */
break;
case HAL_I2C_MSPDEINIT_CB_ID :
hi2c->MspDeInitCallback = HAL_I2C_MspDeInit; /* Legacy weak MspDeInit */
break;
default :
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else if (HAL_I2C_STATE_RESET == hi2c->State)
{
switch (CallbackID)
{
case HAL_I2C_MSPINIT_CB_ID :
hi2c->MspInitCallback = HAL_I2C_MspInit; /* Legacy weak MspInit */
break;
case HAL_I2C_MSPDEINIT_CB_ID :
hi2c->MspDeInitCallback = HAL_I2C_MspDeInit; /* Legacy weak MspDeInit */
break;
default :
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else
{
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(hi2c);
return status;
}
/**
* @brief Register the Slave Address Match I2C Callback
* To be used instead of the weak HAL_I2C_AddrCallback() predefined callback
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param pCallback pointer to the Address Match Callback function
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_RegisterAddrCallback(I2C_HandleTypeDef *hi2c, pI2C_AddrCallbackTypeDef pCallback)
{
HAL_StatusTypeDef status = HAL_OK;
if (pCallback == NULL)
{
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
return HAL_ERROR;
}
/* Process locked */
__HAL_LOCK(hi2c);
if (HAL_I2C_STATE_READY == hi2c->State)
{
hi2c->AddrCallback = pCallback;
}
else
{
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(hi2c);
return status;
}
/**
* @brief UnRegister the Slave Address Match I2C Callback
* Info Ready I2C Callback is redirected to the weak HAL_I2C_AddrCallback() predefined callback
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_UnRegisterAddrCallback(I2C_HandleTypeDef *hi2c)
{
HAL_StatusTypeDef status = HAL_OK;
/* Process locked */
__HAL_LOCK(hi2c);
if (HAL_I2C_STATE_READY == hi2c->State)
{
hi2c->AddrCallback = HAL_I2C_AddrCallback; /* Legacy weak AddrCallback */
}
else
{
/* Update the error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(hi2c);
return status;
}
#endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
/**
* @}
*/
/** @defgroup I2C_Exported_Functions_Group2 Input and Output operation functions
* @brief Data transfers functions
*
@verbatim
===============================================================================
##### IO operation functions #####
===============================================================================
[..]
This subsection provides a set of functions allowing to manage the I2C data
transfers.
(#) There are two modes of transfer:
(++) Blocking mode : The communication is performed in the polling mode.
The status of all data processing is returned by the same function
after finishing transfer.
(++) No-Blocking mode : The communication is performed using Interrupts
or DMA. These functions return the status of the transfer startup.
The end of the data processing will be indicated through the
dedicated I2C IRQ when using Interrupt mode or the DMA IRQ when
using DMA mode.
(#) Blocking mode functions are :
(++) HAL_I2C_Master_Transmit()
(++) HAL_I2C_Master_Receive()
(++) HAL_I2C_Slave_Transmit()
(++) HAL_I2C_Slave_Receive()
(++) HAL_I2C_Mem_Write()
(++) HAL_I2C_Mem_Read()
(++) HAL_I2C_IsDeviceReady()
(#) No-Blocking mode functions with Interrupt are :
(++) HAL_I2C_Master_Transmit_IT()
(++) HAL_I2C_Master_Receive_IT()
(++) HAL_I2C_Slave_Transmit_IT()
(++) HAL_I2C_Slave_Receive_IT()
(++) HAL_I2C_Mem_Write_IT()
(++) HAL_I2C_Mem_Read_IT()
(++) HAL_I2C_Master_Seq_Transmit_IT()
(++) HAL_I2C_Master_Seq_Receive_IT()
(++) HAL_I2C_Slave_Seq_Transmit_IT()
(++) HAL_I2C_Slave_Seq_Receive_IT()
(++) HAL_I2C_EnableListen_IT()
(++) HAL_I2C_DisableListen_IT()
(++) HAL_I2C_Master_Abort_IT()
(#) No-Blocking mode functions with DMA are :
(++) HAL_I2C_Master_Transmit_DMA()
(++) HAL_I2C_Master_Receive_DMA()
(++) HAL_I2C_Slave_Transmit_DMA()
(++) HAL_I2C_Slave_Receive_DMA()
(++) HAL_I2C_Mem_Write_DMA()
(++) HAL_I2C_Mem_Read_DMA()
(++) HAL_I2C_Master_Seq_Transmit_DMA()
(++) HAL_I2C_Master_Seq_Receive_DMA()
(++) HAL_I2C_Slave_Seq_Transmit_DMA()
(++) HAL_I2C_Slave_Seq_Receive_DMA()
(#) A set of Transfer Complete Callbacks are provided in non Blocking mode:
(++) HAL_I2C_MasterTxCpltCallback()
(++) HAL_I2C_MasterRxCpltCallback()
(++) HAL_I2C_SlaveTxCpltCallback()
(++) HAL_I2C_SlaveRxCpltCallback()
(++) HAL_I2C_MemTxCpltCallback()
(++) HAL_I2C_MemRxCpltCallback()
(++) HAL_I2C_AddrCallback()
(++) HAL_I2C_ListenCpltCallback()
(++) HAL_I2C_ErrorCallback()
(++) HAL_I2C_AbortCpltCallback()
@endverbatim
* @{
*/
/**
* @brief Transmits in master mode an amount of data in blocking mode.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
/* Init tickstart for timeout management*/
uint32_t tickstart = HAL_GetTick();
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
{
return HAL_BUSY;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
/* Send Slave Address */
if (I2C_MasterRequestWrite(hi2c, DevAddress, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
while (hi2c->XferSize > 0U)
{
/* Wait until TXE flag is set */
if (I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
}
return HAL_ERROR;
}
/* Write data to DR */
hi2c->Instance->DR = *hi2c->pBuffPtr;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferCount--;
hi2c->XferSize--;
if ((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (hi2c->XferSize != 0U))
{
/* Write data to DR */
hi2c->Instance->DR = *hi2c->pBuffPtr;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferCount--;
hi2c->XferSize--;
}
/* Wait until BTF flag is set */
if (I2C_WaitOnBTFFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
}
return HAL_ERROR;
}
}
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receives in master mode an amount of data in blocking mode.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Master_Receive(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
/* Init tickstart for timeout management*/
uint32_t tickstart = HAL_GetTick();
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
{
return HAL_BUSY;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
/* Send Slave Address */
if (I2C_MasterRequestRead(hi2c, DevAddress, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
if (hi2c->XferSize == 0U)
{
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
}
else if (hi2c->XferSize == 1U)
{
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
}
else if (hi2c->XferSize == 2U)
{
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Enable Pos */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
}
else
{
/* Enable Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
}
while (hi2c->XferSize > 0U)
{
if (hi2c->XferSize <= 3U)
{
/* One byte */
if (hi2c->XferSize == 1U)
{
/* Wait until RXNE flag is set */
if (I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
/* Two bytes */
else if (hi2c->XferSize == 2U)
{
/* Wait until BTF flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
/* 3 Last bytes */
else
{
/* Wait until BTF flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
/* Wait until BTF flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
}
else
{
/* Wait until RXNE flag is set */
if (I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
if (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET)
{
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
}
}
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmits in slave mode an amount of data in blocking mode.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Slave_Transmit(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
/* Init tickstart for timeout management*/
uint32_t tickstart = HAL_GetTick();
if (hi2c->State == HAL_I2C_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_SLAVE;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
/* Enable Address Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Wait until ADDR flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* If 10bit addressing mode is selected */
if (hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT)
{
/* Wait until ADDR flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
}
while (hi2c->XferSize > 0U)
{
/* Wait until TXE flag is set */
if (I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
return HAL_ERROR;
}
/* Write data to DR */
hi2c->Instance->DR = *hi2c->pBuffPtr;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferCount--;
hi2c->XferSize--;
if ((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (hi2c->XferSize != 0U))
{
/* Write data to DR */
hi2c->Instance->DR = *hi2c->pBuffPtr;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferCount--;
hi2c->XferSize--;
}
}
/* Wait until AF flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_AF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Clear AF flag */
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
/* Disable Address Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receive in slave mode an amount of data in blocking mode
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Slave_Receive(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
/* Init tickstart for timeout management*/
uint32_t tickstart = HAL_GetTick();
if (hi2c->State == HAL_I2C_STATE_READY)
{
if ((pData == NULL) || (Size == (uint16_t)0))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_SLAVE;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
/* Enable Address Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Wait until ADDR flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
while (hi2c->XferSize > 0U)
{
/* Wait until RXNE flag is set */
if (I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
return HAL_ERROR;
}
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
if ((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (hi2c->XferSize != 0U))
{
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
}
/* Wait until STOP flag is set */
if (I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
return HAL_ERROR;
}
/* Clear STOP flag */
__HAL_I2C_CLEAR_STOPFLAG(hi2c);
/* Disable Address Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit in master mode an amount of data in non-blocking mode with Interrupt
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Master_Transmit_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
{
__IO uint32_t count = 0U;
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock / 25U / 1000U);
do
{
count--;
if (count == 0U)
{
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
while (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->Devaddress = DevAddress;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT, BUF and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
/* Generate Start */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_START);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receive in master mode an amount of data in non-blocking mode with Interrupt
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Master_Receive_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
{
__IO uint32_t count = 0U;
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock / 25U / 1000U);
do
{
count--;
if (count == 0U)
{
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
while (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->Devaddress = DevAddress;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT, BUF and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
/* Enable Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Generate Start */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_START);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit in slave mode an amount of data in non-blocking mode with Interrupt
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Slave_Transmit_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
{
if (hi2c->State == HAL_I2C_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_SLAVE;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
/* Enable Address Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT, BUF and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receive in slave mode an amount of data in non-blocking mode with Interrupt
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Slave_Receive_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
{
if (hi2c->State == HAL_I2C_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_SLAVE;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
/* Enable Address Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT, BUF and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit in master mode an amount of data in non-blocking mode with DMA
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Master_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
{
__IO uint32_t count = 0U;
HAL_StatusTypeDef dmaxferstatus;
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock / 25U / 1000U);
do
{
count--;
if (count == 0U)
{
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
while (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->Devaddress = DevAddress;
if (hi2c->XferSize > 0U)
{
if (hi2c->hdmatx != NULL)
{
/* Set the I2C DMA transfer complete callback */
hi2c->hdmatx->XferCpltCallback = I2C_DMAXferCplt;
/* Set the DMA error callback */
hi2c->hdmatx->XferErrorCallback = I2C_DMAError;
/* Set the unused DMA callbacks to NULL */
hi2c->hdmatx->XferHalfCpltCallback = NULL;
hi2c->hdmatx->XferM1CpltCallback = NULL;
hi2c->hdmatx->XferM1HalfCpltCallback = NULL;
hi2c->hdmatx->XferAbortCallback = NULL;
/* Enable the DMA stream */
dmaxferstatus = HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)hi2c->pBuffPtr, (uint32_t)&hi2c->Instance->DR, hi2c->XferSize);
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA_PARAM;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
if (dmaxferstatus == HAL_OK)
{
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
/* Enable DMA Request */
SET_BIT(hi2c->Instance->CR2, I2C_CR2_DMAEN);
/* Enable Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Generate Start */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_START);
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
else
{
/* Enable Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Generate Start */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_START);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT, BUF and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
}
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receive in master mode an amount of data in non-blocking mode with DMA
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Master_Receive_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
{
__IO uint32_t count = 0U;
HAL_StatusTypeDef dmaxferstatus;
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock / 25U / 1000U);
do
{
count--;
if (count == 0U)
{
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
while (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->Devaddress = DevAddress;
if (hi2c->XferSize > 0U)
{
if (hi2c->hdmarx != NULL)
{
/* Set the I2C DMA transfer complete callback */
hi2c->hdmarx->XferCpltCallback = I2C_DMAXferCplt;
/* Set the DMA error callback */
hi2c->hdmarx->XferErrorCallback = I2C_DMAError;
/* Set the unused DMA callbacks to NULL */
hi2c->hdmarx->XferHalfCpltCallback = NULL;
hi2c->hdmarx->XferM1CpltCallback = NULL;
hi2c->hdmarx->XferM1HalfCpltCallback = NULL;
hi2c->hdmarx->XferAbortCallback = NULL;
/* Enable the DMA stream */
dmaxferstatus = HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->DR, (uint32_t)hi2c->pBuffPtr, hi2c->XferSize);
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA_PARAM;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
if (dmaxferstatus == HAL_OK)
{
/* Enable Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Generate Start */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_START);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
/* Enable DMA Request */
SET_BIT(hi2c->Instance->CR2, I2C_CR2_DMAEN);
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT, BUF and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
/* Enable Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Generate Start */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_START);
}
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmit in slave mode an amount of data in non-blocking mode with DMA
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Slave_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
{
HAL_StatusTypeDef dmaxferstatus;
if (hi2c->State == HAL_I2C_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_SLAVE;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
if (hi2c->hdmatx != NULL)
{
/* Set the I2C DMA transfer complete callback */
hi2c->hdmatx->XferCpltCallback = I2C_DMAXferCplt;
/* Set the DMA error callback */
hi2c->hdmatx->XferErrorCallback = I2C_DMAError;
/* Set the unused DMA callbacks to NULL */
hi2c->hdmatx->XferHalfCpltCallback = NULL;
hi2c->hdmatx->XferM1CpltCallback = NULL;
hi2c->hdmatx->XferM1HalfCpltCallback = NULL;
hi2c->hdmatx->XferAbortCallback = NULL;
/* Enable the DMA stream */
dmaxferstatus = HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)hi2c->pBuffPtr, (uint32_t)&hi2c->Instance->DR, hi2c->XferSize);
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_LISTEN;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA_PARAM;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
if (dmaxferstatus == HAL_OK)
{
/* Enable Address Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
/* Enable DMA Request */
hi2c->Instance->CR2 |= I2C_CR2_DMAEN;
return HAL_OK;
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receive in slave mode an amount of data in non-blocking mode with DMA
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Slave_Receive_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
{
HAL_StatusTypeDef dmaxferstatus;
if (hi2c->State == HAL_I2C_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_SLAVE;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
if (hi2c->hdmarx != NULL)
{
/* Set the I2C DMA transfer complete callback */
hi2c->hdmarx->XferCpltCallback = I2C_DMAXferCplt;
/* Set the DMA error callback */
hi2c->hdmarx->XferErrorCallback = I2C_DMAError;
/* Set the unused DMA callbacks to NULL */
hi2c->hdmarx->XferHalfCpltCallback = NULL;
hi2c->hdmarx->XferM1CpltCallback = NULL;
hi2c->hdmarx->XferM1HalfCpltCallback = NULL;
hi2c->hdmarx->XferAbortCallback = NULL;
/* Enable the DMA stream */
dmaxferstatus = HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->DR, (uint32_t)hi2c->pBuffPtr, hi2c->XferSize);
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_LISTEN;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA_PARAM;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
if (dmaxferstatus == HAL_OK)
{
/* Enable Address Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
/* Enable DMA Request */
SET_BIT(hi2c->Instance->CR2, I2C_CR2_DMAEN);
return HAL_OK;
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Write an amount of data in blocking mode to a specific memory address
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param MemAddress Internal memory address
* @param MemAddSize Size of internal memory address
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
/* Init tickstart for timeout management*/
uint32_t tickstart = HAL_GetTick();
/* Check the parameters */
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
{
return HAL_BUSY;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_MEM;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
/* Send Slave Address and Memory Address */
if (I2C_RequestMemoryWrite(hi2c, DevAddress, MemAddress, MemAddSize, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
while (hi2c->XferSize > 0U)
{
/* Wait until TXE flag is set */
if (I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
}
return HAL_ERROR;
}
/* Write data to DR */
hi2c->Instance->DR = *hi2c->pBuffPtr;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
if ((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (hi2c->XferSize != 0U))
{
/* Write data to DR */
hi2c->Instance->DR = *hi2c->pBuffPtr;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
}
/* Wait until BTF flag is set */
if (I2C_WaitOnBTFFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
}
return HAL_ERROR;
}
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Read an amount of data in blocking mode from a specific memory address
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param MemAddress Internal memory address
* @param MemAddSize Size of internal memory address
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Mem_Read(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
/* Init tickstart for timeout management*/
uint32_t tickstart = HAL_GetTick();
/* Check the parameters */
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
{
return HAL_BUSY;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_MEM;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
/* Send Slave Address and Memory Address */
if (I2C_RequestMemoryRead(hi2c, DevAddress, MemAddress, MemAddSize, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
if (hi2c->XferSize == 0U)
{
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
}
else if (hi2c->XferSize == 1U)
{
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
}
else if (hi2c->XferSize == 2U)
{
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Enable Pos */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
}
else
{
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
}
while (hi2c->XferSize > 0U)
{
if (hi2c->XferSize <= 3U)
{
/* One byte */
if (hi2c->XferSize == 1U)
{
/* Wait until RXNE flag is set */
if (I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
/* Two bytes */
else if (hi2c->XferSize == 2U)
{
/* Wait until BTF flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
/* 3 Last bytes */
else
{
/* Wait until BTF flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
/* Wait until BTF flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Generate Stop */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_STOP);
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
}
else
{
/* Wait until RXNE flag is set */
if (I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR;
}
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
if (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET)
{
/* Read data from DR */
*hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;
/* Increment Buffer pointer */
hi2c->pBuffPtr++;
/* Update counter */
hi2c->XferSize--;
hi2c->XferCount--;
}
}
}
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Write an amount of data in non-blocking mode with Interrupt to a specific memory address
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param MemAddress Internal memory address
* @param MemAddSize Size of internal memory address
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Mem_Write_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
{
__IO uint32_t count = 0U;
/* Check the parameters */
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock / 25U / 1000U);
do
{
count--;
if (count == 0U)
{
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
while (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_MEM;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->Devaddress = DevAddress;
hi2c->Memaddress = MemAddress;
hi2c->MemaddSize = MemAddSize;
hi2c->EventCount = 0U;
/* Generate Start */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_START);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT, BUF and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Read an amount of data in non-blocking mode with Interrupt from a specific memory address
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address
* @param MemAddress Internal memory address
* @param MemAddSize Size of internal memory address
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Mem_Read_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
{
__IO uint32_t count = 0U;
/* Check the parameters */
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock / 25U / 1000U);
do
{
count--;
if (count == 0U)
{
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
while (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_MEM;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->Devaddress = DevAddress;
hi2c->Memaddress = MemAddress;
hi2c->MemaddSize = MemAddSize;
hi2c->EventCount = 0U;
/* Enable Acknowledge */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
/* Generate Start */
SET_BIT(hi2c->Instance->CR1, I2C_CR1_START);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
if (hi2c->XferSize > 0U)
{
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable EVT, BUF and ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
}
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Write an amount of data in non-blocking mode with DMA to a specific memory address
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param MemAddress Internal memory address
* @param MemAddSize Size of internal memory address
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Mem_Write_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
{
__IO uint32_t count = 0U;
HAL_StatusTypeDef dmaxferstatus;
/* Init tickstart for timeout management*/
uint32_t tickstart = HAL_GetTick();
/* Check the parameters */
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock / 25U / 1000U);
do
{
count--;
if (count == 0U)
{
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
while (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_MEM;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->Devaddress = DevAddress;
hi2c->Memaddress = MemAddress;
hi2c->MemaddSize = MemAddSize;
hi2c->EventCount = 0U;
if (hi2c->XferSize > 0U)
{
if (hi2c->hdmatx != NULL)
{
/* Set the I2C DMA transfer complete callback */
hi2c->hdmatx->XferCpltCallback = I2C_DMAXferCplt;
/* Set the DMA error callback */
hi2c->hdmatx->XferErrorCallback = I2C_DMAError;
/* Set the unused DMA callbacks to NULL */
hi2c->hdmatx->XferHalfCpltCallback = NULL;
hi2c->hdmatx->XferM1CpltCallback = NULL;
hi2c->hdmatx->XferM1HalfCpltCallback = NULL;
hi2c->hdmatx->XferAbortCallback = NULL;
/* Enable the DMA stream */
dmaxferstatus = HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)hi2c->pBuffPtr, (uint32_t)&hi2c->Instance->DR, hi2c->XferSize);
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA_PARAM;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
if (dmaxferstatus == HAL_OK)
{
/* Send Slave Address and Memory Address */
if (I2C_RequestMemoryWrite(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
{
/* Abort the ongoing DMA */
dmaxferstatus = HAL_DMA_Abort_IT(hi2c->hdmatx);
/* Prevent unused argument(s) compilation and MISRA warning */
UNUSED(dmaxferstatus);
/* Set the unused I2C DMA transfer complete callback to NULL */
hi2c->hdmatx->XferCpltCallback = NULL;
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
hi2c->XferSize = 0U;
hi2c->XferCount = 0U;
/* Disable I2C peripheral to prevent dummy data in buffer */
__HAL_I2C_DISABLE(hi2c);
return HAL_ERROR;
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_ERR);
/* Enable DMA Request */
SET_BIT(hi2c->Instance->CR2, I2C_CR2_DMAEN);
return HAL_OK;
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_SIZE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Reads an amount of data in non-blocking mode with DMA from a specific memory address.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shifted to the left before calling the interface
* @param MemAddress Internal memory address
* @param MemAddSize Size of internal memory address
* @param pData Pointer to data buffer
* @param Size Amount of data to be read
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Mem_Read_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
{
/* Init tickstart for timeout management*/
uint32_t tickstart = HAL_GetTick();
__IO uint32_t count = 0U;
HAL_StatusTypeDef dmaxferstatus;
/* Check the parameters */
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock / 25U / 1000U);
do
{
count--;
if (count == 0U)
{
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
while (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if ((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_POS);
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_MEM;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferSize = hi2c->XferCount;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->Devaddress = DevAddress;
hi2c->Memaddress = MemAddress;
hi2c->MemaddSize = MemAddSize;
hi2c->EventCount = 0U;
if (hi2c->XferSize > 0U)
{
if (hi2c->hdmarx != NULL)
{
/* Set the I2C DMA transfer complete callback */
hi2c->hdmarx->XferCpltCallback = I2C_DMAXferCplt;
/* Set the DMA error callback */
hi2c->hdmarx->XferErrorCallback = I2C_DMAError;
/* Set the unused DMA callbacks to NULL */
hi2c->hdmarx->XferHalfCpltCallback = NULL;
hi2c->hdmarx->XferM1CpltCallback = NULL;
hi2c->hdmarx->XferM1HalfCpltCallback = NULL;
hi2c->hdmarx->XferAbortCallback = NULL;
/* Enable the DMA stream */
dmaxferstatus = HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->DR, (uint32_t)hi2c->pBuffPtr, hi2c->XferSize);
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA_PARAM;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
if (dmaxferstatus == HAL_OK)
{
/* Send Slave Address and Memory Address */
if (I2C_RequestMemoryRead(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
{
/* Abort the ongoing DMA */
dmaxferstatus = HAL_DMA_Abort_IT(hi2c->hdmarx);
/* Prevent unused argument(s) compilation and MISRA warning */
UNUSED(dmaxferstatus);
/* Set the unused I2C DMA transfer complete callback to NULL */
hi2c->hdmarx->XferCpltCallback = NULL;
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
hi2c->XferSize = 0U;
hi2c->XferCount = 0U;
/* Disable I2C peripheral to prevent dummy data in buffer */
__HAL_I2C_DISABLE(hi2c);
return HAL_ERROR;
}
if (hi2c->XferSize == 1U)
{
/* Disable Acknowledge */
CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
}
else
{
/* Enable Last DMA bit */
SET_BIT(hi2c->Instance->CR2, I2C_CR2_LAST);
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
/* Note : The I2C interrupts must be enabled after unlocking current process
to avoid the risk of I2C interrupt handle execution before current
process unlock */
/* Enable ERR interrupt */
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_ERR);
/* Enable DMA Request */
hi2c->Instance->CR2 |= I2C_CR2_DMAEN;
}
else
{
/* Update I2C state */
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Update I2C error code */
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
}
else
{