blob: facaf4be7990be9239703626c6a6789fd4794b8c [file] [log] [blame]
/**
******************************************************************************
* @file stm32wbxx_hal_tsc.c
* @author MCD Application Team
* @brief This file provides firmware functions to manage the following
* functionalities of the Touch Sensing Controller (TSC) peripheral:
* + Initialization and De-initialization
* + Channel IOs, Shield IOs and Sampling IOs configuration
* + Start and Stop an acquisition
* + Read acquisition result
* + Interrupts and flags management
*
******************************************************************************
* @attention
*
* Copyright (c) 2019 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@verbatim
================================================================================
##### TSC specific features #####
================================================================================
[..]
(#) Proven and robust surface charge transfer acquisition principle
(#) Supports up to 3 capacitive sensing channels per group
(#) Capacitive sensing channels can be acquired in parallel offering a very good
response time
(#) Spread spectrum feature to improve system robustness in noisy environments
(#) Full hardware management of the charge transfer acquisition sequence
(#) Programmable charge transfer frequency
(#) Programmable sampling capacitor I/O pin
(#) Programmable channel I/O pin
(#) Programmable max count value to avoid long acquisition when a channel is faulty
(#) Dedicated end of acquisition and max count error flags with interrupt capability
(#) One sampling capacitor for up to 3 capacitive sensing channels to reduce the system
components
(#) Compatible with proximity, touchkey, linear and rotary touch sensor implementation
##### How to use this driver #####
================================================================================
[..]
(#) Enable the TSC interface clock using __HAL_RCC_TSC_CLK_ENABLE() macro.
(#) GPIO pins configuration
(++) Enable the clock for the TSC GPIOs using __HAL_RCC_GPIOx_CLK_ENABLE() macro.
(++) Configure the TSC pins used as sampling IOs in alternate function output Open-Drain mode,
and TSC pins used as channel/shield IOs in alternate function output Push-Pull mode
using HAL_GPIO_Init() function.
(#) Interrupts configuration
(++) Configure the NVIC (if the interrupt model is used) using HAL_NVIC_SetPriority()
and HAL_NVIC_EnableIRQ() and function.
(#) TSC configuration
(++) Configure all TSC parameters and used TSC IOs using HAL_TSC_Init() function.
[..] TSC peripheral alternate functions are mapped on AF9.
*** Acquisition sequence ***
===================================
[..]
(+) Discharge all IOs using HAL_TSC_IODischarge() function.
(+) Wait a certain time allowing a good discharge of all capacitors. This delay depends
of the sampling capacitor and electrodes design.
(+) Select the channel IOs to be acquired using HAL_TSC_IOConfig() function.
(+) Launch the acquisition using either HAL_TSC_Start() or HAL_TSC_Start_IT() function.
If the synchronized mode is selected, the acquisition will start as soon as the signal
is received on the synchro pin.
(+) Wait the end of acquisition using either HAL_TSC_PollForAcquisition() or
HAL_TSC_GetState() function or using WFI instruction for example.
(+) Check the group acquisition status using HAL_TSC_GroupGetStatus() function.
(+) Read the acquisition value using HAL_TSC_GroupGetValue() function.
*** Callback registration ***
=============================================
[..]
The compilation flag USE_HAL_TSC_REGISTER_CALLBACKS when set to 1
allows the user to configure dynamically the driver callbacks.
Use Functions HAL_TSC_RegisterCallback() to register an interrupt callback.
[..]
Function HAL_TSC_RegisterCallback() allows to register following callbacks:
(+) ConvCpltCallback : callback for conversion complete process.
(+) ErrorCallback : callback for error detection.
(+) 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.
[..]
Use function HAL_TSC_UnRegisterCallback to reset a callback to the default
weak function.
HAL_TSC_UnRegisterCallback takes as parameters the HAL peripheral handle,
and the Callback ID.
[..]
This function allows to reset following callbacks:
(+) ConvCpltCallback : callback for conversion complete process.
(+) ErrorCallback : callback for error detection.
(+) MspInitCallback : callback for Msp Init.
(+) MspDeInitCallback : callback for Msp DeInit.
[..]
By default, after the HAL_TSC_Init() and when the state is HAL_TSC_STATE_RESET
all callbacks are set to the corresponding weak functions:
examples HAL_TSC_ConvCpltCallback(), HAL_TSC_ErrorCallback().
Exception done for MspInit and MspDeInit functions that are
reset to the legacy weak functions in the HAL_TSC_Init()/ HAL_TSC_DeInit() only when
these callbacks are null (not registered beforehand).
If MspInit or MspDeInit are not null, the HAL_TSC_Init()/ HAL_TSC_DeInit()
keep and use the user MspInit/MspDeInit callbacks (registered beforehand) whatever the state.
[..]
Callbacks can be registered/unregistered in HAL_TSC_STATE_READY state only.
Exception done MspInit/MspDeInit functions that can be registered/unregistered
in HAL_TSC_STATE_READY or HAL_TSC_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_TSC_RegisterCallback() before calling HAL_TSC_DeInit()
or HAL_TSC_Init() function.
[..]
When the compilation flag USE_HAL_TSC_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.
@endverbatim
******************************************************************************
Table 1. IOs for the STM32WBxx devices
+--------------------------------+
| IOs | TSC functions |
|--------------|-----------------|
| PB12 (AF) | TSC_G1_IO1 |
| PB13 (AF) | TSC_G1_IO2 |
| PB14 (AF) | TSC_G1_IO3 |
| PB15 (AF) | TSC_G1_IO4 |
|--------------|-----------------|
| PB4 (AF) | TSC_G2_IO1 |
| PB5 (AF) | TSC_G2_IO2 |
| PB6 (AF) | TSC_G2_IO3 |
| PB7 (AF) | TSC_G2_IO4 |
|--------------|-----------------|
| PA15 (AF) | TSC_G3_IO1 |
| PC10 (AF) | TSC_G3_IO2 |
| PC11 (AF) | TSC_G3_IO3 |
| PC12 (AF) | TSC_G3_IO4 |
|--------------|-----------------|
| PC6 (AF) | TSC_G4_IO1 |
| PC7 (AF) | TSC_G4_IO2 |
| PC8 (AF) | TSC_G4_IO3 |
| PC9 (AF) | TSC_G4_IO4 |
|--------------|-----------------|
| PD4 (AF) | TSC_G5_IO1 |
| PD5 (AF) | TSC_G5_IO2 |
| PD6 (AF) | TSC_G5_IO3 |
| PD7 (AF) | TSC_G5_IO4 |
|--------------|-----------------|
| PD10 (AF) | TSC_G6_IO1 |
| PD11 (AF) | TSC_G6_IO2 |
| PD12 (AF) | TSC_G6_IO3 |
| PD13 (AF) | TSC_G6_IO4 |
|--------------|-----------------|
| PE2 (AF) | TSC_G7_IO1 |
| PE1 (AF) | TSC_G7_IO2 |
| PE0 (AF) | TSC_G7_IO3 |
| PB9 (AF) | TSC_G7_IO4 |
|--------------|-----------------|
| PB10 (AF) | TSC_SYNC |
| PD2 (AF) | |
+--------------------------------+
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32wbxx_hal.h"
#if defined(TSC)
/** @addtogroup STM32WBxx_HAL_Driver
* @{
*/
/** @defgroup TSC TSC
* @brief HAL TSC module driver
* @{
*/
#ifdef HAL_TSC_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static uint32_t TSC_extract_groups(uint32_t iomask);
/* Exported functions --------------------------------------------------------*/
/** @defgroup TSC_Exported_Functions TSC Exported Functions
* @{
*/
/** @defgroup TSC_Exported_Functions_Group1 Initialization and de-initialization functions
* @brief Initialization and Configuration functions
*
@verbatim
===============================================================================
##### Initialization and de-initialization functions #####
===============================================================================
[..] This section provides functions allowing to:
(+) Initialize and configure the TSC.
(+) De-initialize the TSC.
@endverbatim
* @{
*/
/**
* @brief Initialize the TSC peripheral according to the specified parameters
* in the TSC_InitTypeDef structure and initialize the associated handle.
* @param htsc TSC handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_Init(TSC_HandleTypeDef *htsc)
{
/* Check TSC handle allocation */
if (htsc == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
assert_param(IS_TSC_CTPH(htsc->Init.CTPulseHighLength));
assert_param(IS_TSC_CTPL(htsc->Init.CTPulseLowLength));
assert_param(IS_TSC_SS(htsc->Init.SpreadSpectrum));
assert_param(IS_TSC_SSD(htsc->Init.SpreadSpectrumDeviation));
assert_param(IS_TSC_SS_PRESC(htsc->Init.SpreadSpectrumPrescaler));
assert_param(IS_TSC_PG_PRESC(htsc->Init.PulseGeneratorPrescaler));
assert_param(IS_TSC_PG_PRESC_VS_CTPL(htsc->Init.PulseGeneratorPrescaler, htsc->Init.CTPulseLowLength));
assert_param(IS_TSC_MCV(htsc->Init.MaxCountValue));
assert_param(IS_TSC_IODEF(htsc->Init.IODefaultMode));
assert_param(IS_TSC_SYNC_POL(htsc->Init.SynchroPinPolarity));
assert_param(IS_TSC_ACQ_MODE(htsc->Init.AcquisitionMode));
assert_param(IS_TSC_MCE_IT(htsc->Init.MaxCountInterrupt));
assert_param(IS_TSC_GROUP(htsc->Init.ChannelIOs));
assert_param(IS_TSC_GROUP(htsc->Init.ShieldIOs));
assert_param(IS_TSC_GROUP(htsc->Init.SamplingIOs));
if (htsc->State == HAL_TSC_STATE_RESET)
{
/* Allocate lock resource and initialize it */
htsc->Lock = HAL_UNLOCKED;
#if (USE_HAL_TSC_REGISTER_CALLBACKS == 1)
/* Init the TSC Callback settings */
htsc->ConvCpltCallback = HAL_TSC_ConvCpltCallback; /* Legacy weak ConvCpltCallback */
htsc->ErrorCallback = HAL_TSC_ErrorCallback; /* Legacy weak ErrorCallback */
if (htsc->MspInitCallback == NULL)
{
htsc->MspInitCallback = HAL_TSC_MspInit; /* Legacy weak MspInit */
}
/* Init the low level hardware : GPIO, CLOCK, CORTEX...etc */
htsc->MspInitCallback(htsc);
#else
/* Init the low level hardware : GPIO, CLOCK, CORTEX */
HAL_TSC_MspInit(htsc);
#endif /* USE_HAL_TSC_REGISTER_CALLBACKS */
}
/* Initialize the TSC state */
htsc->State = HAL_TSC_STATE_BUSY;
/*--------------------------------------------------------------------------*/
/* Set TSC parameters */
/* Enable TSC */
htsc->Instance->CR = TSC_CR_TSCE;
/* Set all functions */
htsc->Instance->CR |= (htsc->Init.CTPulseHighLength |
htsc->Init.CTPulseLowLength |
(htsc->Init.SpreadSpectrumDeviation << TSC_CR_SSD_Pos) |
htsc->Init.SpreadSpectrumPrescaler |
htsc->Init.PulseGeneratorPrescaler |
htsc->Init.MaxCountValue |
htsc->Init.SynchroPinPolarity |
htsc->Init.AcquisitionMode);
/* Spread spectrum */
if (htsc->Init.SpreadSpectrum == ENABLE)
{
htsc->Instance->CR |= TSC_CR_SSE;
}
/* Disable Schmitt trigger hysteresis on all used TSC IOs */
htsc->Instance->IOHCR = (~(htsc->Init.ChannelIOs | htsc->Init.ShieldIOs | htsc->Init.SamplingIOs));
/* Set channel and shield IOs */
htsc->Instance->IOCCR = (htsc->Init.ChannelIOs | htsc->Init.ShieldIOs);
/* Set sampling IOs */
htsc->Instance->IOSCR = htsc->Init.SamplingIOs;
/* Set the groups to be acquired */
htsc->Instance->IOGCSR = TSC_extract_groups(htsc->Init.ChannelIOs);
/* Disable interrupts */
htsc->Instance->IER &= (~(TSC_IT_EOA | TSC_IT_MCE));
/* Clear flags */
htsc->Instance->ICR = (TSC_FLAG_EOA | TSC_FLAG_MCE);
/*--------------------------------------------------------------------------*/
/* Initialize the TSC state */
htsc->State = HAL_TSC_STATE_READY;
/* Return function status */
return HAL_OK;
}
/**
* @brief Deinitialize the TSC peripheral registers to their default reset values.
* @param htsc TSC handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_DeInit(TSC_HandleTypeDef *htsc)
{
/* Check TSC handle allocation */
if (htsc == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
/* Change TSC state */
htsc->State = HAL_TSC_STATE_BUSY;
#if (USE_HAL_TSC_REGISTER_CALLBACKS == 1)
if (htsc->MspDeInitCallback == NULL)
{
htsc->MspDeInitCallback = HAL_TSC_MspDeInit; /* Legacy weak MspDeInit */
}
/* DeInit the low level hardware: GPIO, CLOCK, NVIC */
htsc->MspDeInitCallback(htsc);
#else
/* DeInit the low level hardware */
HAL_TSC_MspDeInit(htsc);
#endif /* USE_HAL_TSC_REGISTER_CALLBACKS */
/* Change TSC state */
htsc->State = HAL_TSC_STATE_RESET;
/* Process unlocked */
__HAL_UNLOCK(htsc);
/* Return function status */
return HAL_OK;
}
/**
* @brief Initialize the TSC MSP.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval None
*/
__weak void HAL_TSC_MspInit(TSC_HandleTypeDef *htsc)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(htsc);
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_TSC_MspInit could be implemented in the user file.
*/
}
/**
* @brief DeInitialize the TSC MSP.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval None
*/
__weak void HAL_TSC_MspDeInit(TSC_HandleTypeDef *htsc)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(htsc);
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_TSC_MspDeInit could be implemented in the user file.
*/
}
#if (USE_HAL_TSC_REGISTER_CALLBACKS == 1)
/**
* @brief Register a User TSC Callback
* To be used instead of the weak predefined callback
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @param CallbackID ID of the callback to be registered
* This parameter can be one of the following values:
* @arg @ref HAL_TSC_CONV_COMPLETE_CB_ID Conversion completed callback ID
* @arg @ref HAL_TSC_ERROR_CB_ID Error callback ID
* @arg @ref HAL_TSC_MSPINIT_CB_ID MspInit callback ID
* @arg @ref HAL_TSC_MSPDEINIT_CB_ID MspDeInit callback ID
* @param pCallback pointer to the Callback function
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_RegisterCallback(TSC_HandleTypeDef *htsc, HAL_TSC_CallbackIDTypeDef CallbackID,
pTSC_CallbackTypeDef pCallback)
{
HAL_StatusTypeDef status = HAL_OK;
if (pCallback == NULL)
{
/* Update the error code */
htsc->ErrorCode |= HAL_TSC_ERROR_INVALID_CALLBACK;
return HAL_ERROR;
}
/* Process locked */
__HAL_LOCK(htsc);
if (HAL_TSC_STATE_READY == htsc->State)
{
switch (CallbackID)
{
case HAL_TSC_CONV_COMPLETE_CB_ID :
htsc->ConvCpltCallback = pCallback;
break;
case HAL_TSC_ERROR_CB_ID :
htsc->ErrorCallback = pCallback;
break;
case HAL_TSC_MSPINIT_CB_ID :
htsc->MspInitCallback = pCallback;
break;
case HAL_TSC_MSPDEINIT_CB_ID :
htsc->MspDeInitCallback = pCallback;
break;
default :
/* Update the error code */
htsc->ErrorCode |= HAL_TSC_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else if (HAL_TSC_STATE_RESET == htsc->State)
{
switch (CallbackID)
{
case HAL_TSC_MSPINIT_CB_ID :
htsc->MspInitCallback = pCallback;
break;
case HAL_TSC_MSPDEINIT_CB_ID :
htsc->MspDeInitCallback = pCallback;
break;
default :
/* Update the error code */
htsc->ErrorCode |= HAL_TSC_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else
{
/* Update the error code */
htsc->ErrorCode |= HAL_TSC_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(htsc);
return status;
}
/**
* @brief Unregister an TSC Callback
* TSC callback is redirected to the weak predefined callback
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @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_TSC_CONV_COMPLETE_CB_ID Conversion completed callback ID
* @arg @ref HAL_TSC_ERROR_CB_ID Error callback ID
* @arg @ref HAL_TSC_MSPINIT_CB_ID MspInit callback ID
* @arg @ref HAL_TSC_MSPDEINIT_CB_ID MspDeInit callback ID
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_UnRegisterCallback(TSC_HandleTypeDef *htsc, HAL_TSC_CallbackIDTypeDef CallbackID)
{
HAL_StatusTypeDef status = HAL_OK;
/* Process locked */
__HAL_LOCK(htsc);
if (HAL_TSC_STATE_READY == htsc->State)
{
switch (CallbackID)
{
case HAL_TSC_CONV_COMPLETE_CB_ID :
htsc->ConvCpltCallback = HAL_TSC_ConvCpltCallback; /* Legacy weak ConvCpltCallback */
break;
case HAL_TSC_ERROR_CB_ID :
htsc->ErrorCallback = HAL_TSC_ErrorCallback; /* Legacy weak ErrorCallback */
break;
case HAL_TSC_MSPINIT_CB_ID :
htsc->MspInitCallback = HAL_TSC_MspInit; /* Legacy weak MspInit */
break;
case HAL_TSC_MSPDEINIT_CB_ID :
htsc->MspDeInitCallback = HAL_TSC_MspDeInit; /* Legacy weak MspDeInit */
break;
default :
/* Update the error code */
htsc->ErrorCode |= HAL_TSC_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else if (HAL_TSC_STATE_RESET == htsc->State)
{
switch (CallbackID)
{
case HAL_TSC_MSPINIT_CB_ID :
htsc->MspInitCallback = HAL_TSC_MspInit; /* Legacy weak MspInit */
break;
case HAL_TSC_MSPDEINIT_CB_ID :
htsc->MspDeInitCallback = HAL_TSC_MspDeInit; /* Legacy weak MspDeInit */
break;
default :
/* Update the error code */
htsc->ErrorCode |= HAL_TSC_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else
{
/* Update the error code */
htsc->ErrorCode |= HAL_TSC_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(htsc);
return status;
}
#endif /* USE_HAL_TSC_REGISTER_CALLBACKS */
/**
* @}
*/
/** @defgroup TSC_Exported_Functions_Group2 Input and Output operation functions
* @brief Input and Output operation functions
*
@verbatim
===============================================================================
##### IO Operation functions #####
===============================================================================
[..] This section provides functions allowing to:
(+) Start acquisition in polling mode.
(+) Start acquisition in interrupt mode.
(+) Stop conversion in polling mode.
(+) Stop conversion in interrupt mode.
(+) Poll for acquisition completed.
(+) Get group acquisition status.
(+) Get group acquisition value.
@endverbatim
* @{
*/
/**
* @brief Start the acquisition.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_Start(TSC_HandleTypeDef *htsc)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
/* Process locked */
__HAL_LOCK(htsc);
/* Change TSC state */
htsc->State = HAL_TSC_STATE_BUSY;
/* Clear interrupts */
__HAL_TSC_DISABLE_IT(htsc, (TSC_IT_EOA | TSC_IT_MCE));
/* Clear flags */
__HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
/* Set touch sensing IOs not acquired to the specified IODefaultMode */
if (htsc->Init.IODefaultMode == TSC_IODEF_OUT_PP_LOW)
{
__HAL_TSC_SET_IODEF_OUTPPLOW(htsc);
}
else
{
__HAL_TSC_SET_IODEF_INFLOAT(htsc);
}
/* Launch the acquisition */
__HAL_TSC_START_ACQ(htsc);
/* Process unlocked */
__HAL_UNLOCK(htsc);
/* Return function status */
return HAL_OK;
}
/**
* @brief Start the acquisition in interrupt mode.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval HAL status.
*/
HAL_StatusTypeDef HAL_TSC_Start_IT(TSC_HandleTypeDef *htsc)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
assert_param(IS_TSC_MCE_IT(htsc->Init.MaxCountInterrupt));
/* Process locked */
__HAL_LOCK(htsc);
/* Change TSC state */
htsc->State = HAL_TSC_STATE_BUSY;
/* Enable end of acquisition interrupt */
__HAL_TSC_ENABLE_IT(htsc, TSC_IT_EOA);
/* Enable max count error interrupt (optional) */
if (htsc->Init.MaxCountInterrupt == ENABLE)
{
__HAL_TSC_ENABLE_IT(htsc, TSC_IT_MCE);
}
else
{
__HAL_TSC_DISABLE_IT(htsc, TSC_IT_MCE);
}
/* Clear flags */
__HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
/* Set touch sensing IOs not acquired to the specified IODefaultMode */
if (htsc->Init.IODefaultMode == TSC_IODEF_OUT_PP_LOW)
{
__HAL_TSC_SET_IODEF_OUTPPLOW(htsc);
}
else
{
__HAL_TSC_SET_IODEF_INFLOAT(htsc);
}
/* Launch the acquisition */
__HAL_TSC_START_ACQ(htsc);
/* Process unlocked */
__HAL_UNLOCK(htsc);
/* Return function status */
return HAL_OK;
}
/**
* @brief Stop the acquisition previously launched in polling mode.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_Stop(TSC_HandleTypeDef *htsc)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
/* Process locked */
__HAL_LOCK(htsc);
/* Stop the acquisition */
__HAL_TSC_STOP_ACQ(htsc);
/* Set touch sensing IOs in low power mode (output push-pull) */
__HAL_TSC_SET_IODEF_OUTPPLOW(htsc);
/* Clear flags */
__HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
/* Change TSC state */
htsc->State = HAL_TSC_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(htsc);
/* Return function status */
return HAL_OK;
}
/**
* @brief Stop the acquisition previously launched in interrupt mode.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_Stop_IT(TSC_HandleTypeDef *htsc)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
/* Process locked */
__HAL_LOCK(htsc);
/* Stop the acquisition */
__HAL_TSC_STOP_ACQ(htsc);
/* Set touch sensing IOs in low power mode (output push-pull) */
__HAL_TSC_SET_IODEF_OUTPPLOW(htsc);
/* Disable interrupts */
__HAL_TSC_DISABLE_IT(htsc, (TSC_IT_EOA | TSC_IT_MCE));
/* Clear flags */
__HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
/* Change TSC state */
htsc->State = HAL_TSC_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(htsc);
/* Return function status */
return HAL_OK;
}
/**
* @brief Start acquisition and wait until completion.
* @note There is no need of a timeout parameter as the max count error is already
* managed by the TSC peripheral.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval HAL state
*/
HAL_StatusTypeDef HAL_TSC_PollForAcquisition(TSC_HandleTypeDef *htsc)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
/* Process locked */
__HAL_LOCK(htsc);
/* Check end of acquisition */
while (HAL_TSC_GetState(htsc) == HAL_TSC_STATE_BUSY)
{
/* The timeout (max count error) is managed by the TSC peripheral itself. */
}
/* Process unlocked */
__HAL_UNLOCK(htsc);
return HAL_OK;
}
/**
* @brief Get the acquisition status for a group.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @param gx_index Index of the group
* @retval Group status
*/
TSC_GroupStatusTypeDef HAL_TSC_GroupGetStatus(const TSC_HandleTypeDef *htsc, uint32_t gx_index)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
assert_param(IS_TSC_GROUP_INDEX(gx_index));
/* Return the group status */
return (__HAL_TSC_GET_GROUP_STATUS(htsc, gx_index));
}
/**
* @brief Get the acquisition measure for a group.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @param gx_index Index of the group
* @retval Acquisition measure
*/
uint32_t HAL_TSC_GroupGetValue(const TSC_HandleTypeDef *htsc, uint32_t gx_index)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
assert_param(IS_TSC_GROUP_INDEX(gx_index));
/* Return the group acquisition counter */
return htsc->Instance->IOGXCR[gx_index];
}
/**
* @}
*/
/** @defgroup TSC_Exported_Functions_Group3 Peripheral Control functions
* @brief Peripheral Control functions
*
@verbatim
===============================================================================
##### Peripheral Control functions #####
===============================================================================
[..] This section provides functions allowing to:
(+) Configure TSC IOs
(+) Discharge TSC IOs
@endverbatim
* @{
*/
/**
* @brief Configure TSC IOs.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @param config Pointer to the configuration structure.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_IOConfig(TSC_HandleTypeDef *htsc, const TSC_IOConfigTypeDef *config)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
assert_param(IS_TSC_GROUP(config->ChannelIOs));
assert_param(IS_TSC_GROUP(config->ShieldIOs));
assert_param(IS_TSC_GROUP(config->SamplingIOs));
/* Process locked */
__HAL_LOCK(htsc);
/* Stop acquisition */
__HAL_TSC_STOP_ACQ(htsc);
/* Disable Schmitt trigger hysteresis on all used TSC IOs */
htsc->Instance->IOHCR = (~(config->ChannelIOs | config->ShieldIOs | config->SamplingIOs));
/* Set channel and shield IOs */
htsc->Instance->IOCCR = (config->ChannelIOs | config->ShieldIOs);
/* Set sampling IOs */
htsc->Instance->IOSCR = config->SamplingIOs;
/* Set groups to be acquired */
htsc->Instance->IOGCSR = TSC_extract_groups(config->ChannelIOs);
/* Process unlocked */
__HAL_UNLOCK(htsc);
/* Return function status */
return HAL_OK;
}
/**
* @brief Discharge TSC IOs.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @param choice This parameter can be set to ENABLE or DISABLE.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_TSC_IODischarge(TSC_HandleTypeDef *htsc, FunctionalState choice)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
/* Process locked */
__HAL_LOCK(htsc);
if (choice == ENABLE)
{
__HAL_TSC_SET_IODEF_OUTPPLOW(htsc);
}
else
{
__HAL_TSC_SET_IODEF_INFLOAT(htsc);
}
/* Process unlocked */
__HAL_UNLOCK(htsc);
/* Return the group acquisition counter */
return HAL_OK;
}
/**
* @}
*/
/** @defgroup TSC_Exported_Functions_Group4 Peripheral State and Errors functions
* @brief Peripheral State and Errors functions
*
@verbatim
===============================================================================
##### State and Errors functions #####
===============================================================================
[..]
This subsection provides functions allowing to
(+) Get TSC state.
@endverbatim
* @{
*/
/**
* @brief Return the TSC handle state.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval HAL state
*/
HAL_TSC_StateTypeDef HAL_TSC_GetState(TSC_HandleTypeDef *htsc)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
if (htsc->State == HAL_TSC_STATE_BUSY)
{
/* Check end of acquisition flag */
if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_EOA) != RESET)
{
/* Check max count error flag */
if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_MCE) != RESET)
{
/* Change TSC state */
htsc->State = HAL_TSC_STATE_ERROR;
}
else
{
/* Change TSC state */
htsc->State = HAL_TSC_STATE_READY;
}
}
}
/* Return TSC state */
return htsc->State;
}
/**
* @}
*/
/** @defgroup TSC_IRQ_Handler_and_Callbacks IRQ Handler and Callbacks
* @{
*/
/**
* @brief Handle TSC interrupt request.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval None
*/
void HAL_TSC_IRQHandler(TSC_HandleTypeDef *htsc)
{
/* Check the parameters */
assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
/* Check if the end of acquisition occurred */
if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_EOA) != RESET)
{
/* Clear EOA flag */
__HAL_TSC_CLEAR_FLAG(htsc, TSC_FLAG_EOA);
}
/* Check if max count error occurred */
if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_MCE) != RESET)
{
/* Clear MCE flag */
__HAL_TSC_CLEAR_FLAG(htsc, TSC_FLAG_MCE);
/* Change TSC state */
htsc->State = HAL_TSC_STATE_ERROR;
#if (USE_HAL_TSC_REGISTER_CALLBACKS == 1)
htsc->ErrorCallback(htsc);
#else
/* Conversion completed callback */
HAL_TSC_ErrorCallback(htsc);
#endif /* USE_HAL_TSC_REGISTER_CALLBACKS */
}
else
{
/* Change TSC state */
htsc->State = HAL_TSC_STATE_READY;
#if (USE_HAL_TSC_REGISTER_CALLBACKS == 1)
htsc->ConvCpltCallback(htsc);
#else
/* Conversion completed callback */
HAL_TSC_ConvCpltCallback(htsc);
#endif /* USE_HAL_TSC_REGISTER_CALLBACKS */
}
}
/**
* @brief Acquisition completed callback in non-blocking mode.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval None
*/
__weak void HAL_TSC_ConvCpltCallback(TSC_HandleTypeDef *htsc)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(htsc);
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_TSC_ConvCpltCallback could be implemented in the user file.
*/
}
/**
* @brief Error callback in non-blocking mode.
* @param htsc Pointer to a TSC_HandleTypeDef structure that contains
* the configuration information for the specified TSC.
* @retval None
*/
__weak void HAL_TSC_ErrorCallback(TSC_HandleTypeDef *htsc)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(htsc);
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_TSC_ErrorCallback could be implemented in the user file.
*/
}
/**
* @}
*/
/**
* @}
*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup TSC_Private_Functions TSC Private Functions
* @{
*/
/**
* @brief Utility function used to set the acquired groups mask.
* @param iomask Channels IOs mask
* @retval Acquired groups mask
*/
static uint32_t TSC_extract_groups(uint32_t iomask)
{
uint32_t groups = 0UL;
uint32_t idx;
for (idx = 0UL; idx < (uint32_t)TSC_NB_OF_GROUPS; idx++)
{
if ((iomask & (0x0FUL << (idx * 4UL))) != 0UL)
{
groups |= (1UL << idx);
}
}
return groups;
}
/**
* @}
*/
#endif /* HAL_TSC_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/
#endif /* TSC */