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/**
******************************************************************************
* @file stm32f4xx_ll_i2c.h
* @author MCD Application Team
* @brief Header file of I2C LL module.
******************************************************************************
* @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
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32F4xx_LL_I2C_H
#define __STM32F4xx_LL_I2C_H
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx.h"
/** @addtogroup STM32F4xx_LL_Driver
* @{
*/
#if defined (I2C1) || defined (I2C2) || defined (I2C3)
/** @defgroup I2C_LL I2C
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/** @defgroup I2C_LL_Private_Constants I2C Private Constants
* @{
*/
/* Defines used to perform compute and check in the macros */
#define LL_I2C_MAX_SPEED_STANDARD 100000U
#define LL_I2C_MAX_SPEED_FAST 400000U
/**
* @}
*/
/* Private macros ------------------------------------------------------------*/
#if defined(USE_FULL_LL_DRIVER)
/** @defgroup I2C_LL_Private_Macros I2C Private Macros
* @{
*/
/**
* @}
*/
#endif /*USE_FULL_LL_DRIVER*/
/* Exported types ------------------------------------------------------------*/
#if defined(USE_FULL_LL_DRIVER)
/** @defgroup I2C_LL_ES_INIT I2C Exported Init structure
* @{
*/
typedef struct
{
uint32_t PeripheralMode; /*!< Specifies the peripheral mode.
This parameter can be a value of @ref I2C_LL_EC_PERIPHERAL_MODE
This feature can be modified afterwards using unitary function @ref LL_I2C_SetMode(). */
uint32_t ClockSpeed; /*!< Specifies the clock frequency.
This parameter must be set to a value lower than 400kHz (in Hz)
This feature can be modified afterwards using unitary function @ref LL_I2C_SetClockPeriod()
or @ref LL_I2C_SetDutyCycle() or @ref LL_I2C_SetClockSpeedMode() or @ref LL_I2C_ConfigSpeed(). */
uint32_t DutyCycle; /*!< Specifies the I2C fast mode duty cycle.
This parameter can be a value of @ref I2C_LL_EC_DUTYCYCLE
This feature can be modified afterwards using unitary function @ref LL_I2C_SetDutyCycle(). */
#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
uint32_t AnalogFilter; /*!< Enables or disables analog noise filter.
This parameter can be a value of @ref I2C_LL_EC_ANALOGFILTER_SELECTION
This feature can be modified afterwards using unitary functions @ref LL_I2C_EnableAnalogFilter() or LL_I2C_DisableAnalogFilter(). */
uint32_t DigitalFilter; /*!< Configures the digital noise filter.
This parameter can be a number between Min_Data = 0x00 and Max_Data = 0x0F
This feature can be modified afterwards using unitary function @ref LL_I2C_SetDigitalFilter(). */
#endif
uint32_t OwnAddress1; /*!< Specifies the device own address 1.
This parameter must be a value between Min_Data = 0x00 and Max_Data = 0x3FF
This feature can be modified afterwards using unitary function @ref LL_I2C_SetOwnAddress1(). */
uint32_t TypeAcknowledge; /*!< Specifies the ACKnowledge or Non ACKnowledge condition after the address receive match code or next received byte.
This parameter can be a value of @ref I2C_LL_EC_I2C_ACKNOWLEDGE
This feature can be modified afterwards using unitary function @ref LL_I2C_AcknowledgeNextData(). */
uint32_t OwnAddrSize; /*!< Specifies the device own address 1 size (7-bit or 10-bit).
This parameter can be a value of @ref I2C_LL_EC_OWNADDRESS1
This feature can be modified afterwards using unitary function @ref LL_I2C_SetOwnAddress1(). */
} LL_I2C_InitTypeDef;
/**
* @}
*/
#endif /*USE_FULL_LL_DRIVER*/
/* Exported constants --------------------------------------------------------*/
/** @defgroup I2C_LL_Exported_Constants I2C Exported Constants
* @{
*/
/** @defgroup I2C_LL_EC_GET_FLAG Get Flags Defines
* @brief Flags defines which can be used with LL_I2C_ReadReg function
* @{
*/
#define LL_I2C_SR1_SB I2C_SR1_SB /*!< Start Bit (master mode) */
#define LL_I2C_SR1_ADDR I2C_SR1_ADDR /*!< Address sent (master mode) or
Address matched flag (slave mode) */
#define LL_I2C_SR1_BTF I2C_SR1_BTF /*!< Byte Transfer Finished flag */
#define LL_I2C_SR1_ADD10 I2C_SR1_ADD10 /*!< 10-bit header sent (master mode) */
#define LL_I2C_SR1_STOPF I2C_SR1_STOPF /*!< Stop detection flag (slave mode) */
#define LL_I2C_SR1_RXNE I2C_SR1_RXNE /*!< Data register not empty (receivers) */
#define LL_I2C_SR1_TXE I2C_SR1_TXE /*!< Data register empty (transmitters) */
#define LL_I2C_SR1_BERR I2C_SR1_BERR /*!< Bus error */
#define LL_I2C_SR1_ARLO I2C_SR1_ARLO /*!< Arbitration lost */
#define LL_I2C_SR1_AF I2C_SR1_AF /*!< Acknowledge failure flag */
#define LL_I2C_SR1_OVR I2C_SR1_OVR /*!< Overrun/Underrun */
#define LL_I2C_SR1_PECERR I2C_ISR_PECERR /*!< PEC Error in reception (SMBus mode) */
#define LL_I2C_SR1_TIMEOUT I2C_ISR_TIMEOUT /*!< Timeout detection flag (SMBus mode) */
#define LL_I2C_SR1_SMALERT I2C_ISR_SMALERT /*!< SMBus alert (SMBus mode) */
#define LL_I2C_SR2_MSL I2C_SR2_MSL /*!< Master/Slave flag */
#define LL_I2C_SR2_BUSY I2C_SR2_BUSY /*!< Bus busy flag */
#define LL_I2C_SR2_TRA I2C_SR2_TRA /*!< Transmitter/receiver direction */
#define LL_I2C_SR2_GENCALL I2C_SR2_GENCALL /*!< General call address (Slave mode) */
#define LL_I2C_SR2_SMBDEFAULT I2C_SR2_SMBDEFAULT /*!< SMBus Device default address (Slave mode) */
#define LL_I2C_SR2_SMBHOST I2C_SR2_SMBHOST /*!< SMBus Host address (Slave mode) */
#define LL_I2C_SR2_DUALF I2C_SR2_DUALF /*!< Dual flag (Slave mode) */
/**
* @}
*/
/** @defgroup I2C_LL_EC_IT IT Defines
* @brief IT defines which can be used with LL_I2C_ReadReg and LL_I2C_WriteReg functions
* @{
*/
#define LL_I2C_CR2_ITEVTEN I2C_CR2_ITEVTEN /*!< Events interrupts enable */
#define LL_I2C_CR2_ITBUFEN I2C_CR2_ITBUFEN /*!< Buffer interrupts enable */
#define LL_I2C_CR2_ITERREN I2C_CR2_ITERREN /*!< Error interrupts enable */
/**
* @}
*/
#if defined(I2C_FLTR_ANOFF)
/** @defgroup I2C_LL_EC_ANALOGFILTER_SELECTION Analog Filter Selection
* @{
*/
#define LL_I2C_ANALOGFILTER_ENABLE 0x00000000U /*!< Analog filter is enabled. */
#define LL_I2C_ANALOGFILTER_DISABLE I2C_FLTR_ANOFF /*!< Analog filter is disabled.*/
/**
* @}
*/
#endif
/** @defgroup I2C_LL_EC_OWNADDRESS1 Own Address 1 Length
* @{
*/
#define LL_I2C_OWNADDRESS1_7BIT 0x00004000U /*!< Own address 1 is a 7-bit address. */
#define LL_I2C_OWNADDRESS1_10BIT (uint32_t)(I2C_OAR1_ADDMODE | 0x00004000U) /*!< Own address 1 is a 10-bit address. */
/**
* @}
*/
/** @defgroup I2C_LL_EC_DUTYCYCLE Fast Mode Duty Cycle
* @{
*/
#define LL_I2C_DUTYCYCLE_2 0x00000000U /*!< I2C fast mode Tlow/Thigh = 2 */
#define LL_I2C_DUTYCYCLE_16_9 I2C_CCR_DUTY /*!< I2C fast mode Tlow/Thigh = 16/9 */
/**
* @}
*/
/** @defgroup I2C_LL_EC_CLOCK_SPEED_MODE Master Clock Speed Mode
* @{
*/
#define LL_I2C_CLOCK_SPEED_STANDARD_MODE 0x00000000U /*!< Master clock speed range is standard mode */
#define LL_I2C_CLOCK_SPEED_FAST_MODE I2C_CCR_FS /*!< Master clock speed range is fast mode */
/**
* @}
*/
/** @defgroup I2C_LL_EC_PERIPHERAL_MODE Peripheral Mode
* @{
*/
#define LL_I2C_MODE_I2C 0x00000000U /*!< I2C Master or Slave mode */
#define LL_I2C_MODE_SMBUS_HOST (uint32_t)(I2C_CR1_SMBUS | I2C_CR1_SMBTYPE | I2C_CR1_ENARP) /*!< SMBus Host address acknowledge */
#define LL_I2C_MODE_SMBUS_DEVICE I2C_CR1_SMBUS /*!< SMBus Device default mode (Default address not acknowledge) */
#define LL_I2C_MODE_SMBUS_DEVICE_ARP (uint32_t)(I2C_CR1_SMBUS | I2C_CR1_ENARP) /*!< SMBus Device Default address acknowledge */
/**
* @}
*/
/** @defgroup I2C_LL_EC_I2C_ACKNOWLEDGE Acknowledge Generation
* @{
*/
#define LL_I2C_ACK I2C_CR1_ACK /*!< ACK is sent after current received byte. */
#define LL_I2C_NACK 0x00000000U /*!< NACK is sent after current received byte.*/
/**
* @}
*/
/** @defgroup I2C_LL_EC_DIRECTION Read Write Direction
* @{
*/
#define LL_I2C_DIRECTION_WRITE I2C_SR2_TRA /*!< Bus is in write transfer */
#define LL_I2C_DIRECTION_READ 0x00000000U /*!< Bus is in read transfer */
/**
* @}
*/
/**
* @}
*/
/* Exported macro ------------------------------------------------------------*/
/** @defgroup I2C_LL_Exported_Macros I2C Exported Macros
* @{
*/
/** @defgroup I2C_LL_EM_WRITE_READ Common Write and read registers Macros
* @{
*/
/**
* @brief Write a value in I2C register
* @param __INSTANCE__ I2C Instance
* @param __REG__ Register to be written
* @param __VALUE__ Value to be written in the register
* @retval None
*/
#define LL_I2C_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, (__VALUE__))
/**
* @brief Read a value in I2C register
* @param __INSTANCE__ I2C Instance
* @param __REG__ Register to be read
* @retval Register value
*/
#define LL_I2C_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
/**
* @}
*/
/** @defgroup I2C_LL_EM_Exported_Macros_Helper Exported_Macros_Helper
* @{
*/
/**
* @brief Convert Peripheral Clock Frequency in Mhz.
* @param __PCLK__ This parameter must be a value of peripheral clock (in Hz).
* @retval Value of peripheral clock (in Mhz)
*/
#define __LL_I2C_FREQ_HZ_TO_MHZ(__PCLK__) (uint32_t)((__PCLK__)/1000000U)
/**
* @brief Convert Peripheral Clock Frequency in Hz.
* @param __PCLK__ This parameter must be a value of peripheral clock (in Mhz).
* @retval Value of peripheral clock (in Hz)
*/
#define __LL_I2C_FREQ_MHZ_TO_HZ(__PCLK__) (uint32_t)((__PCLK__)*1000000U)
/**
* @brief Compute I2C Clock rising time.
* @param __FREQRANGE__ This parameter must be a value of peripheral clock (in Mhz).
* @param __SPEED__ This parameter must be a value lower than 400kHz (in Hz).
* @retval Value between Min_Data=0x02 and Max_Data=0x3F
*/
#define __LL_I2C_RISE_TIME(__FREQRANGE__, __SPEED__) (uint32_t)(((__SPEED__) <= LL_I2C_MAX_SPEED_STANDARD) ? ((__FREQRANGE__) + 1U) : ((((__FREQRANGE__) * 300U) / 1000U) + 1U))
/**
* @brief Compute Speed clock range to a Clock Control Register (I2C_CCR_CCR) value.
* @param __PCLK__ This parameter must be a value of peripheral clock (in Hz).
* @param __SPEED__ This parameter must be a value lower than 400kHz (in Hz).
* @param __DUTYCYCLE__ This parameter can be one of the following values:
* @arg @ref LL_I2C_DUTYCYCLE_2
* @arg @ref LL_I2C_DUTYCYCLE_16_9
* @retval Value between Min_Data=0x004 and Max_Data=0xFFF, except in FAST DUTY mode where Min_Data=0x001.
*/
#define __LL_I2C_SPEED_TO_CCR(__PCLK__, __SPEED__, __DUTYCYCLE__) (uint32_t)(((__SPEED__) <= LL_I2C_MAX_SPEED_STANDARD)? \
(__LL_I2C_SPEED_STANDARD_TO_CCR((__PCLK__), (__SPEED__))) : \
(__LL_I2C_SPEED_FAST_TO_CCR((__PCLK__), (__SPEED__), (__DUTYCYCLE__))))
/**
* @brief Compute Speed Standard clock range to a Clock Control Register (I2C_CCR_CCR) value.
* @param __PCLK__ This parameter must be a value of peripheral clock (in Hz).
* @param __SPEED__ This parameter must be a value lower than 100kHz (in Hz).
* @retval Value between Min_Data=0x004 and Max_Data=0xFFF.
*/
#define __LL_I2C_SPEED_STANDARD_TO_CCR(__PCLK__, __SPEED__) (uint32_t)(((((__PCLK__)/((__SPEED__) << 1U)) & I2C_CCR_CCR) < 4U)? 4U:((__PCLK__) / ((__SPEED__) << 1U)))
/**
* @brief Compute Speed Fast clock range to a Clock Control Register (I2C_CCR_CCR) value.
* @param __PCLK__ This parameter must be a value of peripheral clock (in Hz).
* @param __SPEED__ This parameter must be a value between Min_Data=100Khz and Max_Data=400Khz (in Hz).
* @param __DUTYCYCLE__ This parameter can be one of the following values:
* @arg @ref LL_I2C_DUTYCYCLE_2
* @arg @ref LL_I2C_DUTYCYCLE_16_9
* @retval Value between Min_Data=0x001 and Max_Data=0xFFF
*/
#define __LL_I2C_SPEED_FAST_TO_CCR(__PCLK__, __SPEED__, __DUTYCYCLE__) (uint32_t)(((__DUTYCYCLE__) == LL_I2C_DUTYCYCLE_2)? \
(((((__PCLK__) / ((__SPEED__) * 3U)) & I2C_CCR_CCR) == 0U)? 1U:((__PCLK__) / ((__SPEED__) * 3U))) : \
(((((__PCLK__) / ((__SPEED__) * 25U)) & I2C_CCR_CCR) == 0U)? 1U:((__PCLK__) / ((__SPEED__) * 25U))))
/**
* @brief Get the Least significant bits of a 10-Bits address.
* @param __ADDRESS__ This parameter must be a value of a 10-Bits slave address.
* @retval Value between Min_Data=0x00 and Max_Data=0xFF
*/
#define __LL_I2C_10BIT_ADDRESS(__ADDRESS__) ((uint8_t)((uint16_t)((__ADDRESS__) & (uint16_t)(0x00FF))))
/**
* @brief Convert a 10-Bits address to a 10-Bits header with Write direction.
* @param __ADDRESS__ This parameter must be a value of a 10-Bits slave address.
* @retval Value between Min_Data=0xF0 and Max_Data=0xF6
*/
#define __LL_I2C_10BIT_HEADER_WRITE(__ADDRESS__) ((uint8_t)((uint16_t)((uint16_t)(((uint16_t)((__ADDRESS__) & (uint16_t)(0x0300))) >> 7) | (uint16_t)(0xF0))))
/**
* @brief Convert a 10-Bits address to a 10-Bits header with Read direction.
* @param __ADDRESS__ This parameter must be a value of a 10-Bits slave address.
* @retval Value between Min_Data=0xF1 and Max_Data=0xF7
*/
#define __LL_I2C_10BIT_HEADER_READ(__ADDRESS__) ((uint8_t)((uint16_t)((uint16_t)(((uint16_t)((__ADDRESS__) & (uint16_t)(0x0300))) >> 7) | (uint16_t)(0xF1))))
/**
* @}
*/
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup I2C_LL_Exported_Functions I2C Exported Functions
* @{
*/
/** @defgroup I2C_LL_EF_Configuration Configuration
* @{
*/
/**
* @brief Enable I2C peripheral (PE = 1).
* @rmtoll CR1 PE LL_I2C_Enable
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_Enable(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_PE);
}
/**
* @brief Disable I2C peripheral (PE = 0).
* @rmtoll CR1 PE LL_I2C_Disable
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_Disable(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR1, I2C_CR1_PE);
}
/**
* @brief Check if the I2C peripheral is enabled or disabled.
* @rmtoll CR1 PE LL_I2C_IsEnabled
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabled(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR1, I2C_CR1_PE) == (I2C_CR1_PE));
}
#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
/**
* @brief Configure Noise Filters (Analog and Digital).
* @note If the analog filter is also enabled, the digital filter is added to analog filter.
* The filters can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll FLTR ANOFF LL_I2C_ConfigFilters\n
* FLTR DNF LL_I2C_ConfigFilters
* @param I2Cx I2C Instance.
* @param AnalogFilter This parameter can be one of the following values:
* @arg @ref LL_I2C_ANALOGFILTER_ENABLE
* @arg @ref LL_I2C_ANALOGFILTER_DISABLE
* @param DigitalFilter This parameter must be a value between Min_Data=0x00 (Digital filter disabled) and Max_Data=0x0F (Digital filter enabled and filtering capability up to 15*TPCLK1)
* This parameter is used to configure the digital noise filter on SDA and SCL input. The digital filter will suppress the spikes with a length of up to DNF[3:0]*TPCLK1.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ConfigFilters(I2C_TypeDef *I2Cx, uint32_t AnalogFilter, uint32_t DigitalFilter)
{
MODIFY_REG(I2Cx->FLTR, I2C_FLTR_ANOFF | I2C_FLTR_DNF, AnalogFilter | DigitalFilter);
}
#endif
#if defined(I2C_FLTR_DNF)
/**
* @brief Configure Digital Noise Filter.
* @note If the analog filter is also enabled, the digital filter is added to analog filter.
* This filter can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll FLTR DNF LL_I2C_SetDigitalFilter
* @param I2Cx I2C Instance.
* @param DigitalFilter This parameter must be a value between Min_Data=0x00 (Digital filter disabled) and Max_Data=0x0F (Digital filter enabled and filtering capability up to 15*TPCLK1)
* This parameter is used to configure the digital noise filter on SDA and SCL input. The digital filter will suppress the spikes with a length of up to DNF[3:0]*TPCLK1.
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetDigitalFilter(I2C_TypeDef *I2Cx, uint32_t DigitalFilter)
{
MODIFY_REG(I2Cx->FLTR, I2C_FLTR_DNF, DigitalFilter);
}
/**
* @brief Get the current Digital Noise Filter configuration.
* @rmtoll FLTR DNF LL_I2C_GetDigitalFilter
* @param I2Cx I2C Instance.
* @retval Value between Min_Data=0x0 and Max_Data=0xF
*/
__STATIC_INLINE uint32_t LL_I2C_GetDigitalFilter(I2C_TypeDef *I2Cx)
{
return (uint32_t)(READ_BIT(I2Cx->FLTR, I2C_FLTR_DNF));
}
#endif
#if defined(I2C_FLTR_ANOFF)
/**
* @brief Enable Analog Noise Filter.
* @note This filter can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll FLTR ANOFF LL_I2C_EnableAnalogFilter
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableAnalogFilter(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->FLTR, I2C_FLTR_ANOFF);
}
/**
* @brief Disable Analog Noise Filter.
* @note This filter can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll FLTR ANOFF LL_I2C_DisableAnalogFilter
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableAnalogFilter(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->FLTR, I2C_FLTR_ANOFF);
}
/**
* @brief Check if Analog Noise Filter is enabled or disabled.
* @rmtoll FLTR ANOFF LL_I2C_IsEnabledAnalogFilter
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledAnalogFilter(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->FLTR, I2C_FLTR_ANOFF) == (I2C_FLTR_ANOFF));
}
#endif
/**
* @brief Enable DMA transmission requests.
* @rmtoll CR2 DMAEN LL_I2C_EnableDMAReq_TX
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableDMAReq_TX(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR2, I2C_CR2_DMAEN);
}
/**
* @brief Disable DMA transmission requests.
* @rmtoll CR2 DMAEN LL_I2C_DisableDMAReq_TX
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableDMAReq_TX(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR2, I2C_CR2_DMAEN);
}
/**
* @brief Check if DMA transmission requests are enabled or disabled.
* @rmtoll CR2 DMAEN LL_I2C_IsEnabledDMAReq_TX
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledDMAReq_TX(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR2, I2C_CR2_DMAEN) == (I2C_CR2_DMAEN));
}
/**
* @brief Enable DMA reception requests.
* @rmtoll CR2 DMAEN LL_I2C_EnableDMAReq_RX
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableDMAReq_RX(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR2, I2C_CR2_DMAEN);
}
/**
* @brief Disable DMA reception requests.
* @rmtoll CR2 DMAEN LL_I2C_DisableDMAReq_RX
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableDMAReq_RX(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR2, I2C_CR2_DMAEN);
}
/**
* @brief Check if DMA reception requests are enabled or disabled.
* @rmtoll CR2 DMAEN LL_I2C_IsEnabledDMAReq_RX
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledDMAReq_RX(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR2, I2C_CR2_DMAEN) == (I2C_CR2_DMAEN));
}
/**
* @brief Get the data register address used for DMA transfer.
* @rmtoll DR DR LL_I2C_DMA_GetRegAddr
* @param I2Cx I2C Instance.
* @retval Address of data register
*/
__STATIC_INLINE uint32_t LL_I2C_DMA_GetRegAddr(I2C_TypeDef *I2Cx)
{
return (uint32_t) & (I2Cx->DR);
}
/**
* @brief Enable Clock stretching.
* @note This bit can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll CR1 NOSTRETCH LL_I2C_EnableClockStretching
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableClockStretching(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR1, I2C_CR1_NOSTRETCH);
}
/**
* @brief Disable Clock stretching.
* @note This bit can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll CR1 NOSTRETCH LL_I2C_DisableClockStretching
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableClockStretching(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_NOSTRETCH);
}
/**
* @brief Check if Clock stretching is enabled or disabled.
* @rmtoll CR1 NOSTRETCH LL_I2C_IsEnabledClockStretching
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledClockStretching(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR1, I2C_CR1_NOSTRETCH) != (I2C_CR1_NOSTRETCH));
}
/**
* @brief Enable General Call.
* @note When enabled the Address 0x00 is ACKed.
* @rmtoll CR1 ENGC LL_I2C_EnableGeneralCall
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableGeneralCall(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_ENGC);
}
/**
* @brief Disable General Call.
* @note When disabled the Address 0x00 is NACKed.
* @rmtoll CR1 ENGC LL_I2C_DisableGeneralCall
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableGeneralCall(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR1, I2C_CR1_ENGC);
}
/**
* @brief Check if General Call is enabled or disabled.
* @rmtoll CR1 ENGC LL_I2C_IsEnabledGeneralCall
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledGeneralCall(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR1, I2C_CR1_ENGC) == (I2C_CR1_ENGC));
}
/**
* @brief Set the Own Address1.
* @rmtoll OAR1 ADD0 LL_I2C_SetOwnAddress1\n
* OAR1 ADD1_7 LL_I2C_SetOwnAddress1\n
* OAR1 ADD8_9 LL_I2C_SetOwnAddress1\n
* OAR1 ADDMODE LL_I2C_SetOwnAddress1
* @param I2Cx I2C Instance.
* @param OwnAddress1 This parameter must be a value between Min_Data=0 and Max_Data=0x3FF.
* @param OwnAddrSize This parameter can be one of the following values:
* @arg @ref LL_I2C_OWNADDRESS1_7BIT
* @arg @ref LL_I2C_OWNADDRESS1_10BIT
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetOwnAddress1(I2C_TypeDef *I2Cx, uint32_t OwnAddress1, uint32_t OwnAddrSize)
{
MODIFY_REG(I2Cx->OAR1, I2C_OAR1_ADD0 | I2C_OAR1_ADD1_7 | I2C_OAR1_ADD8_9 | I2C_OAR1_ADDMODE, OwnAddress1 | OwnAddrSize);
}
/**
* @brief Set the 7bits Own Address2.
* @note This action has no effect if own address2 is enabled.
* @rmtoll OAR2 ADD2 LL_I2C_SetOwnAddress2
* @param I2Cx I2C Instance.
* @param OwnAddress2 This parameter must be a value between Min_Data=0 and Max_Data=0x7F.
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetOwnAddress2(I2C_TypeDef *I2Cx, uint32_t OwnAddress2)
{
MODIFY_REG(I2Cx->OAR2, I2C_OAR2_ADD2, OwnAddress2);
}
/**
* @brief Enable acknowledge on Own Address2 match address.
* @rmtoll OAR2 ENDUAL LL_I2C_EnableOwnAddress2
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableOwnAddress2(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->OAR2, I2C_OAR2_ENDUAL);
}
/**
* @brief Disable acknowledge on Own Address2 match address.
* @rmtoll OAR2 ENDUAL LL_I2C_DisableOwnAddress2
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableOwnAddress2(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->OAR2, I2C_OAR2_ENDUAL);
}
/**
* @brief Check if Own Address1 acknowledge is enabled or disabled.
* @rmtoll OAR2 ENDUAL LL_I2C_IsEnabledOwnAddress2
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledOwnAddress2(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->OAR2, I2C_OAR2_ENDUAL) == (I2C_OAR2_ENDUAL));
}
/**
* @brief Configure the Peripheral clock frequency.
* @rmtoll CR2 FREQ LL_I2C_SetPeriphClock
* @param I2Cx I2C Instance.
* @param PeriphClock Peripheral Clock (in Hz)
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetPeriphClock(I2C_TypeDef *I2Cx, uint32_t PeriphClock)
{
MODIFY_REG(I2Cx->CR2, I2C_CR2_FREQ, __LL_I2C_FREQ_HZ_TO_MHZ(PeriphClock));
}
/**
* @brief Get the Peripheral clock frequency.
* @rmtoll CR2 FREQ LL_I2C_GetPeriphClock
* @param I2Cx I2C Instance.
* @retval Value of Peripheral Clock (in Hz)
*/
__STATIC_INLINE uint32_t LL_I2C_GetPeriphClock(I2C_TypeDef *I2Cx)
{
return (uint32_t)(__LL_I2C_FREQ_MHZ_TO_HZ(READ_BIT(I2Cx->CR2, I2C_CR2_FREQ)));
}
/**
* @brief Configure the Duty cycle (Fast mode only).
* @rmtoll CCR DUTY LL_I2C_SetDutyCycle
* @param I2Cx I2C Instance.
* @param DutyCycle This parameter can be one of the following values:
* @arg @ref LL_I2C_DUTYCYCLE_2
* @arg @ref LL_I2C_DUTYCYCLE_16_9
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetDutyCycle(I2C_TypeDef *I2Cx, uint32_t DutyCycle)
{
MODIFY_REG(I2Cx->CCR, I2C_CCR_DUTY, DutyCycle);
}
/**
* @brief Get the Duty cycle (Fast mode only).
* @rmtoll CCR DUTY LL_I2C_GetDutyCycle
* @param I2Cx I2C Instance.
* @retval Returned value can be one of the following values:
* @arg @ref LL_I2C_DUTYCYCLE_2
* @arg @ref LL_I2C_DUTYCYCLE_16_9
*/
__STATIC_INLINE uint32_t LL_I2C_GetDutyCycle(I2C_TypeDef *I2Cx)
{
return (uint32_t)(READ_BIT(I2Cx->CCR, I2C_CCR_DUTY));
}
/**
* @brief Configure the I2C master clock speed mode.
* @rmtoll CCR FS LL_I2C_SetClockSpeedMode
* @param I2Cx I2C Instance.
* @param ClockSpeedMode This parameter can be one of the following values:
* @arg @ref LL_I2C_CLOCK_SPEED_STANDARD_MODE
* @arg @ref LL_I2C_CLOCK_SPEED_FAST_MODE
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetClockSpeedMode(I2C_TypeDef *I2Cx, uint32_t ClockSpeedMode)
{
MODIFY_REG(I2Cx->CCR, I2C_CCR_FS, ClockSpeedMode);
}
/**
* @brief Get the the I2C master speed mode.
* @rmtoll CCR FS LL_I2C_GetClockSpeedMode
* @param I2Cx I2C Instance.
* @retval Returned value can be one of the following values:
* @arg @ref LL_I2C_CLOCK_SPEED_STANDARD_MODE
* @arg @ref LL_I2C_CLOCK_SPEED_FAST_MODE
*/
__STATIC_INLINE uint32_t LL_I2C_GetClockSpeedMode(I2C_TypeDef *I2Cx)
{
return (uint32_t)(READ_BIT(I2Cx->CCR, I2C_CCR_FS));
}
/**
* @brief Configure the SCL, SDA rising time.
* @note This bit can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll TRISE TRISE LL_I2C_SetRiseTime
* @param I2Cx I2C Instance.
* @param RiseTime This parameter must be a value between Min_Data=0x02 and Max_Data=0x3F.
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetRiseTime(I2C_TypeDef *I2Cx, uint32_t RiseTime)
{
MODIFY_REG(I2Cx->TRISE, I2C_TRISE_TRISE, RiseTime);
}
/**
* @brief Get the SCL, SDA rising time.
* @rmtoll TRISE TRISE LL_I2C_GetRiseTime
* @param I2Cx I2C Instance.
* @retval Value between Min_Data=0x02 and Max_Data=0x3F
*/
__STATIC_INLINE uint32_t LL_I2C_GetRiseTime(I2C_TypeDef *I2Cx)
{
return (uint32_t)(READ_BIT(I2Cx->TRISE, I2C_TRISE_TRISE));
}
/**
* @brief Configure the SCL high and low period.
* @note This bit can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll CCR CCR LL_I2C_SetClockPeriod
* @param I2Cx I2C Instance.
* @param ClockPeriod This parameter must be a value between Min_Data=0x004 and Max_Data=0xFFF, except in FAST DUTY mode where Min_Data=0x001.
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetClockPeriod(I2C_TypeDef *I2Cx, uint32_t ClockPeriod)
{
MODIFY_REG(I2Cx->CCR, I2C_CCR_CCR, ClockPeriod);
}
/**
* @brief Get the SCL high and low period.
* @rmtoll CCR CCR LL_I2C_GetClockPeriod
* @param I2Cx I2C Instance.
* @retval Value between Min_Data=0x004 and Max_Data=0xFFF, except in FAST DUTY mode where Min_Data=0x001.
*/
__STATIC_INLINE uint32_t LL_I2C_GetClockPeriod(I2C_TypeDef *I2Cx)
{
return (uint32_t)(READ_BIT(I2Cx->CCR, I2C_CCR_CCR));
}
/**
* @brief Configure the SCL speed.
* @note This bit can only be programmed when the I2C is disabled (PE = 0).
* @rmtoll CR2 FREQ LL_I2C_ConfigSpeed\n
* TRISE TRISE LL_I2C_ConfigSpeed\n
* CCR FS LL_I2C_ConfigSpeed\n
* CCR DUTY LL_I2C_ConfigSpeed\n
* CCR CCR LL_I2C_ConfigSpeed
* @param I2Cx I2C Instance.
* @param PeriphClock Peripheral Clock (in Hz)
* @param ClockSpeed This parameter must be a value lower than 400kHz (in Hz).
* @param DutyCycle This parameter can be one of the following values:
* @arg @ref LL_I2C_DUTYCYCLE_2
* @arg @ref LL_I2C_DUTYCYCLE_16_9
* @retval None
*/
__STATIC_INLINE void LL_I2C_ConfigSpeed(I2C_TypeDef *I2Cx, uint32_t PeriphClock, uint32_t ClockSpeed,
uint32_t DutyCycle)
{
uint32_t freqrange = 0x0U;
uint32_t clockconfig = 0x0U;
/* Compute frequency range */
freqrange = __LL_I2C_FREQ_HZ_TO_MHZ(PeriphClock);
/* Configure I2Cx: Frequency range register */
MODIFY_REG(I2Cx->CR2, I2C_CR2_FREQ, freqrange);
/* Configure I2Cx: Rise Time register */
MODIFY_REG(I2Cx->TRISE, I2C_TRISE_TRISE, __LL_I2C_RISE_TIME(freqrange, ClockSpeed));
/* Configure Speed mode, Duty Cycle and Clock control register value */
if (ClockSpeed > LL_I2C_MAX_SPEED_STANDARD)
{
/* Set Speed mode at fast and duty cycle for Clock Speed request in fast clock range */
clockconfig = LL_I2C_CLOCK_SPEED_FAST_MODE | \
__LL_I2C_SPEED_FAST_TO_CCR(PeriphClock, ClockSpeed, DutyCycle) | \
DutyCycle;
}
else
{
/* Set Speed mode at standard for Clock Speed request in standard clock range */
clockconfig = LL_I2C_CLOCK_SPEED_STANDARD_MODE | \
__LL_I2C_SPEED_STANDARD_TO_CCR(PeriphClock, ClockSpeed);
}
/* Configure I2Cx: Clock control register */
MODIFY_REG(I2Cx->CCR, (I2C_CCR_FS | I2C_CCR_DUTY | I2C_CCR_CCR), clockconfig);
}
/**
* @brief Configure peripheral mode.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll CR1 SMBUS LL_I2C_SetMode\n
* CR1 SMBTYPE LL_I2C_SetMode\n
* CR1 ENARP LL_I2C_SetMode
* @param I2Cx I2C Instance.
* @param PeripheralMode This parameter can be one of the following values:
* @arg @ref LL_I2C_MODE_I2C
* @arg @ref LL_I2C_MODE_SMBUS_HOST
* @arg @ref LL_I2C_MODE_SMBUS_DEVICE
* @arg @ref LL_I2C_MODE_SMBUS_DEVICE_ARP
* @retval None
*/
__STATIC_INLINE void LL_I2C_SetMode(I2C_TypeDef *I2Cx, uint32_t PeripheralMode)
{
MODIFY_REG(I2Cx->CR1, I2C_CR1_SMBUS | I2C_CR1_SMBTYPE | I2C_CR1_ENARP, PeripheralMode);
}
/**
* @brief Get peripheral mode.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll CR1 SMBUS LL_I2C_GetMode\n
* CR1 SMBTYPE LL_I2C_GetMode\n
* CR1 ENARP LL_I2C_GetMode
* @param I2Cx I2C Instance.
* @retval Returned value can be one of the following values:
* @arg @ref LL_I2C_MODE_I2C
* @arg @ref LL_I2C_MODE_SMBUS_HOST
* @arg @ref LL_I2C_MODE_SMBUS_DEVICE
* @arg @ref LL_I2C_MODE_SMBUS_DEVICE_ARP
*/
__STATIC_INLINE uint32_t LL_I2C_GetMode(I2C_TypeDef *I2Cx)
{
return (uint32_t)(READ_BIT(I2Cx->CR1, I2C_CR1_SMBUS | I2C_CR1_SMBTYPE | I2C_CR1_ENARP));
}
/**
* @brief Enable SMBus alert (Host or Device mode)
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @note SMBus Device mode:
* - SMBus Alert pin is drived low and
* Alert Response Address Header acknowledge is enabled.
* SMBus Host mode:
* - SMBus Alert pin management is supported.
* @rmtoll CR1 ALERT LL_I2C_EnableSMBusAlert
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableSMBusAlert(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_ALERT);
}
/**
* @brief Disable SMBus alert (Host or Device mode)
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @note SMBus Device mode:
* - SMBus Alert pin is not drived (can be used as a standard GPIO) and
* Alert Response Address Header acknowledge is disabled.
* SMBus Host mode:
* - SMBus Alert pin management is not supported.
* @rmtoll CR1 ALERT LL_I2C_DisableSMBusAlert
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableSMBusAlert(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR1, I2C_CR1_ALERT);
}
/**
* @brief Check if SMBus alert (Host or Device mode) is enabled or disabled.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll CR1 ALERT LL_I2C_IsEnabledSMBusAlert
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusAlert(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR1, I2C_CR1_ALERT) == (I2C_CR1_ALERT));
}
/**
* @brief Enable SMBus Packet Error Calculation (PEC).
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll CR1 ENPEC LL_I2C_EnableSMBusPEC
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableSMBusPEC(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_ENPEC);
}
/**
* @brief Disable SMBus Packet Error Calculation (PEC).
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll CR1 ENPEC LL_I2C_DisableSMBusPEC
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableSMBusPEC(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR1, I2C_CR1_ENPEC);
}
/**
* @brief Check if SMBus Packet Error Calculation (PEC) is enabled or disabled.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll CR1 ENPEC LL_I2C_IsEnabledSMBusPEC
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusPEC(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR1, I2C_CR1_ENPEC) == (I2C_CR1_ENPEC));
}
/**
* @}
*/
/** @defgroup I2C_LL_EF_IT_Management IT_Management
* @{
*/
/**
* @brief Enable TXE interrupt.
* @rmtoll CR2 ITEVTEN LL_I2C_EnableIT_TX\n
* CR2 ITBUFEN LL_I2C_EnableIT_TX
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableIT_TX(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN);
}
/**
* @brief Disable TXE interrupt.
* @rmtoll CR2 ITEVTEN LL_I2C_DisableIT_TX\n
* CR2 ITBUFEN LL_I2C_DisableIT_TX
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableIT_TX(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN);
}
/**
* @brief Check if the TXE Interrupt is enabled or disabled.
* @rmtoll CR2 ITEVTEN LL_I2C_IsEnabledIT_TX\n
* CR2 ITBUFEN LL_I2C_IsEnabledIT_TX
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledIT_TX(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN) == (I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN));
}
/**
* @brief Enable RXNE interrupt.
* @rmtoll CR2 ITEVTEN LL_I2C_EnableIT_RX\n
* CR2 ITBUFEN LL_I2C_EnableIT_RX
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableIT_RX(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN);
}
/**
* @brief Disable RXNE interrupt.
* @rmtoll CR2 ITEVTEN LL_I2C_DisableIT_RX\n
* CR2 ITBUFEN LL_I2C_DisableIT_RX
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableIT_RX(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN);
}
/**
* @brief Check if the RXNE Interrupt is enabled or disabled.
* @rmtoll CR2 ITEVTEN LL_I2C_IsEnabledIT_RX\n
* CR2 ITBUFEN LL_I2C_IsEnabledIT_RX
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledIT_RX(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN) == (I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN));
}
/**
* @brief Enable Events interrupts.
* @note Any of these events will generate interrupt :
* Start Bit (SB)
* Address sent, Address matched (ADDR)
* 10-bit header sent (ADD10)
* Stop detection (STOPF)
* Byte transfer finished (BTF)
*
* @note Any of these events will generate interrupt if Buffer interrupts are enabled too(using unitary function @ref LL_I2C_EnableIT_BUF()) :
* Receive buffer not empty (RXNE)
* Transmit buffer empty (TXE)
* @rmtoll CR2 ITEVTEN LL_I2C_EnableIT_EVT
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableIT_EVT(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN);
}
/**
* @brief Disable Events interrupts.
* @note Any of these events will generate interrupt :
* Start Bit (SB)
* Address sent, Address matched (ADDR)
* 10-bit header sent (ADD10)
* Stop detection (STOPF)
* Byte transfer finished (BTF)
* Receive buffer not empty (RXNE)
* Transmit buffer empty (TXE)
* @rmtoll CR2 ITEVTEN LL_I2C_DisableIT_EVT
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableIT_EVT(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN);
}
/**
* @brief Check if Events interrupts are enabled or disabled.
* @rmtoll CR2 ITEVTEN LL_I2C_IsEnabledIT_EVT
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledIT_EVT(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR2, I2C_CR2_ITEVTEN) == (I2C_CR2_ITEVTEN));
}
/**
* @brief Enable Buffer interrupts.
* @note Any of these Buffer events will generate interrupt if Events interrupts are enabled too(using unitary function @ref LL_I2C_EnableIT_EVT()) :
* Receive buffer not empty (RXNE)
* Transmit buffer empty (TXE)
* @rmtoll CR2 ITBUFEN LL_I2C_EnableIT_BUF
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableIT_BUF(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR2, I2C_CR2_ITBUFEN);
}
/**
* @brief Disable Buffer interrupts.
* @note Any of these Buffer events will generate interrupt :
* Receive buffer not empty (RXNE)
* Transmit buffer empty (TXE)
* @rmtoll CR2 ITBUFEN LL_I2C_DisableIT_BUF
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableIT_BUF(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR2, I2C_CR2_ITBUFEN);
}
/**
* @brief Check if Buffer interrupts are enabled or disabled.
* @rmtoll CR2 ITBUFEN LL_I2C_IsEnabledIT_BUF
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledIT_BUF(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR2, I2C_CR2_ITBUFEN) == (I2C_CR2_ITBUFEN));
}
/**
* @brief Enable Error interrupts.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @note Any of these errors will generate interrupt :
* Bus Error detection (BERR)
* Arbitration Loss (ARLO)
* Acknowledge Failure(AF)
* Overrun/Underrun (OVR)
* SMBus Timeout detection (TIMEOUT)
* SMBus PEC error detection (PECERR)
* SMBus Alert pin event detection (SMBALERT)
* @rmtoll CR2 ITERREN LL_I2C_EnableIT_ERR
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableIT_ERR(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR2, I2C_CR2_ITERREN);
}
/**
* @brief Disable Error interrupts.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @note Any of these errors will generate interrupt :
* Bus Error detection (BERR)
* Arbitration Loss (ARLO)
* Acknowledge Failure(AF)
* Overrun/Underrun (OVR)
* SMBus Timeout detection (TIMEOUT)
* SMBus PEC error detection (PECERR)
* SMBus Alert pin event detection (SMBALERT)
* @rmtoll CR2 ITERREN LL_I2C_DisableIT_ERR
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableIT_ERR(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR2, I2C_CR2_ITERREN);
}
/**
* @brief Check if Error interrupts are enabled or disabled.
* @rmtoll CR2 ITERREN LL_I2C_IsEnabledIT_ERR
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledIT_ERR(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR2, I2C_CR2_ITERREN) == (I2C_CR2_ITERREN));
}
/**
* @}
*/
/** @defgroup I2C_LL_EF_FLAG_management FLAG_management
* @{
*/
/**
* @brief Indicate the status of Transmit data register empty flag.
* @note RESET: When next data is written in Transmit data register.
* SET: When Transmit data register is empty.
* @rmtoll SR1 TXE LL_I2C_IsActiveFlag_TXE
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_TXE(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_TXE) == (I2C_SR1_TXE));
}
/**
* @brief Indicate the status of Byte Transfer Finished flag.
* RESET: When Data byte transfer not done.
* SET: When Data byte transfer succeeded.
* @rmtoll SR1 BTF LL_I2C_IsActiveFlag_BTF
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_BTF(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_BTF) == (I2C_SR1_BTF));
}
/**
* @brief Indicate the status of Receive data register not empty flag.
* @note RESET: When Receive data register is read.
* SET: When the received data is copied in Receive data register.
* @rmtoll SR1 RXNE LL_I2C_IsActiveFlag_RXNE
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_RXNE(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_RXNE) == (I2C_SR1_RXNE));
}
/**
* @brief Indicate the status of Start Bit (master mode).
* @note RESET: When No Start condition.
* SET: When Start condition is generated.
* @rmtoll SR1 SB LL_I2C_IsActiveFlag_SB
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_SB(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_SB) == (I2C_SR1_SB));
}
/**
* @brief Indicate the status of Address sent (master mode) or Address matched flag (slave mode).
* @note RESET: Clear default value.
* SET: When the address is fully sent (master mode) or when the received slave address matched with one of the enabled slave address (slave mode).
* @rmtoll SR1 ADDR LL_I2C_IsActiveFlag_ADDR
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_ADDR(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_ADDR) == (I2C_SR1_ADDR));
}
/**
* @brief Indicate the status of 10-bit header sent (master mode).
* @note RESET: When no ADD10 event occurred.
* SET: When the master has sent the first address byte (header).
* @rmtoll SR1 ADD10 LL_I2C_IsActiveFlag_ADD10
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_ADD10(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_ADD10) == (I2C_SR1_ADD10));
}
/**
* @brief Indicate the status of Acknowledge failure flag.
* @note RESET: No acknowledge failure.
* SET: When an acknowledge failure is received after a byte transmission.
* @rmtoll SR1 AF LL_I2C_IsActiveFlag_AF
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_AF(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_AF) == (I2C_SR1_AF));
}
/**
* @brief Indicate the status of Stop detection flag (slave mode).
* @note RESET: Clear default value.
* SET: When a Stop condition is detected.
* @rmtoll SR1 STOPF LL_I2C_IsActiveFlag_STOP
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_STOP(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_STOPF) == (I2C_SR1_STOPF));
}
/**
* @brief Indicate the status of Bus error flag.
* @note RESET: Clear default value.
* SET: When a misplaced Start or Stop condition is detected.
* @rmtoll SR1 BERR LL_I2C_IsActiveFlag_BERR
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_BERR(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_BERR) == (I2C_SR1_BERR));
}
/**
* @brief Indicate the status of Arbitration lost flag.
* @note RESET: Clear default value.
* SET: When arbitration lost.
* @rmtoll SR1 ARLO LL_I2C_IsActiveFlag_ARLO
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_ARLO(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_ARLO) == (I2C_SR1_ARLO));
}
/**
* @brief Indicate the status of Overrun/Underrun flag.
* @note RESET: Clear default value.
* SET: When an overrun/underrun error occurs (Clock Stretching Disabled).
* @rmtoll SR1 OVR LL_I2C_IsActiveFlag_OVR
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_OVR(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_OVR) == (I2C_SR1_OVR));
}
/**
* @brief Indicate the status of SMBus PEC error flag in reception.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll SR1 PECERR LL_I2C_IsActiveSMBusFlag_PECERR
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveSMBusFlag_PECERR(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_PECERR) == (I2C_SR1_PECERR));
}
/**
* @brief Indicate the status of SMBus Timeout detection flag.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll SR1 TIMEOUT LL_I2C_IsActiveSMBusFlag_TIMEOUT
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveSMBusFlag_TIMEOUT(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_TIMEOUT) == (I2C_SR1_TIMEOUT));
}
/**
* @brief Indicate the status of SMBus alert flag.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll SR1 SMBALERT LL_I2C_IsActiveSMBusFlag_ALERT
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveSMBusFlag_ALERT(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR1, I2C_SR1_SMBALERT) == (I2C_SR1_SMBALERT));
}
/**
* @brief Indicate the status of Bus Busy flag.
* @note RESET: Clear default value.
* SET: When a Start condition is detected.
* @rmtoll SR2 BUSY LL_I2C_IsActiveFlag_BUSY
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_BUSY(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR2, I2C_SR2_BUSY) == (I2C_SR2_BUSY));
}
/**
* @brief Indicate the status of Dual flag.
* @note RESET: Received address matched with OAR1.
* SET: Received address matched with OAR2.
* @rmtoll SR2 DUALF LL_I2C_IsActiveFlag_DUAL
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_DUAL(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR2, I2C_SR2_DUALF) == (I2C_SR2_DUALF));
}
/**
* @brief Indicate the status of SMBus Host address reception (Slave mode).
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @note RESET: No SMBus Host address
* SET: SMBus Host address received.
* @note This status is cleared by hardware after a STOP condition or repeated START condition.
* @rmtoll SR2 SMBHOST LL_I2C_IsActiveSMBusFlag_SMBHOST
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveSMBusFlag_SMBHOST(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR2, I2C_SR2_SMBHOST) == (I2C_SR2_SMBHOST));
}
/**
* @brief Indicate the status of SMBus Device default address reception (Slave mode).
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @note RESET: No SMBus Device default address
* SET: SMBus Device default address received.
* @note This status is cleared by hardware after a STOP condition or repeated START condition.
* @rmtoll SR2 SMBDEFAULT LL_I2C_IsActiveSMBusFlag_SMBDEFAULT
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveSMBusFlag_SMBDEFAULT(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR2, I2C_SR2_SMBDEFAULT) == (I2C_SR2_SMBDEFAULT));
}
/**
* @brief Indicate the status of General call address reception (Slave mode).
* @note RESET: No Generall call address
* SET: General call address received.
* @note This status is cleared by hardware after a STOP condition or repeated START condition.
* @rmtoll SR2 GENCALL LL_I2C_IsActiveFlag_GENCALL
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_GENCALL(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR2, I2C_SR2_GENCALL) == (I2C_SR2_GENCALL));
}
/**
* @brief Indicate the status of Master/Slave flag.
* @note RESET: Slave Mode.
* SET: Master Mode.
* @rmtoll SR2 MSL LL_I2C_IsActiveFlag_MSL
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsActiveFlag_MSL(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->SR2, I2C_SR2_MSL) == (I2C_SR2_MSL));
}
/**
* @brief Clear Address Matched flag.
* @note Clearing this flag is done by a read access to the I2Cx_SR1
* register followed by a read access to the I2Cx_SR2 register.
* @rmtoll SR1 ADDR LL_I2C_ClearFlag_ADDR
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearFlag_ADDR(I2C_TypeDef *I2Cx)
{
__IO uint32_t tmpreg;
tmpreg = I2Cx->SR1;
(void) tmpreg;
tmpreg = I2Cx->SR2;
(void) tmpreg;
}
/**
* @brief Clear Acknowledge failure flag.
* @rmtoll SR1 AF LL_I2C_ClearFlag_AF
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearFlag_AF(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->SR1, I2C_SR1_AF);
}
/**
* @brief Clear Stop detection flag.
* @note Clearing this flag is done by a read access to the I2Cx_SR1
* register followed by a write access to I2Cx_CR1 register.
* @rmtoll SR1 STOPF LL_I2C_ClearFlag_STOP\n
* CR1 PE LL_I2C_ClearFlag_STOP
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearFlag_STOP(I2C_TypeDef *I2Cx)
{
__IO uint32_t tmpreg;
tmpreg = I2Cx->SR1;
(void) tmpreg;
SET_BIT(I2Cx->CR1, I2C_CR1_PE);
}
/**
* @brief Clear Bus error flag.
* @rmtoll SR1 BERR LL_I2C_ClearFlag_BERR
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearFlag_BERR(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->SR1, I2C_SR1_BERR);
}
/**
* @brief Clear Arbitration lost flag.
* @rmtoll SR1 ARLO LL_I2C_ClearFlag_ARLO
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearFlag_ARLO(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->SR1, I2C_SR1_ARLO);
}
/**
* @brief Clear Overrun/Underrun flag.
* @rmtoll SR1 OVR LL_I2C_ClearFlag_OVR
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearFlag_OVR(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->SR1, I2C_SR1_OVR);
}
/**
* @brief Clear SMBus PEC error flag.
* @rmtoll SR1 PECERR LL_I2C_ClearSMBusFlag_PECERR
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearSMBusFlag_PECERR(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->SR1, I2C_SR1_PECERR);
}
/**
* @brief Clear SMBus Timeout detection flag.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll SR1 TIMEOUT LL_I2C_ClearSMBusFlag_TIMEOUT
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearSMBusFlag_TIMEOUT(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->SR1, I2C_SR1_TIMEOUT);
}
/**
* @brief Clear SMBus Alert flag.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll SR1 SMBALERT LL_I2C_ClearSMBusFlag_ALERT
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_ClearSMBusFlag_ALERT(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->SR1, I2C_SR1_SMBALERT);
}
/**
* @}
*/
/** @defgroup I2C_LL_EF_Data_Management Data_Management
* @{
*/
/**
* @brief Enable Reset of I2C peripheral.
* @rmtoll CR1 SWRST LL_I2C_EnableReset
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableReset(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_SWRST);
}
/**
* @brief Disable Reset of I2C peripheral.
* @rmtoll CR1 SWRST LL_I2C_DisableReset
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableReset(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR1, I2C_CR1_SWRST);
}
/**
* @brief Check if the I2C peripheral is under reset state or not.
* @rmtoll CR1 SWRST LL_I2C_IsResetEnabled
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsResetEnabled(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR1, I2C_CR1_SWRST) == (I2C_CR1_SWRST));
}
/**
* @brief Prepare the generation of a ACKnowledge or Non ACKnowledge condition after the address receive match code or next received byte.
* @note Usage in Slave or Master mode.
* @rmtoll CR1 ACK LL_I2C_AcknowledgeNextData
* @param I2Cx I2C Instance.
* @param TypeAcknowledge This parameter can be one of the following values:
* @arg @ref LL_I2C_ACK
* @arg @ref LL_I2C_NACK
* @retval None
*/
__STATIC_INLINE void LL_I2C_AcknowledgeNextData(I2C_TypeDef *I2Cx, uint32_t TypeAcknowledge)
{
MODIFY_REG(I2Cx->CR1, I2C_CR1_ACK, TypeAcknowledge);
}
/**
* @brief Generate a START or RESTART condition
* @note The START bit can be set even if bus is BUSY or I2C is in slave mode.
* This action has no effect when RELOAD is set.
* @rmtoll CR1 START LL_I2C_GenerateStartCondition
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_GenerateStartCondition(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_START);
}
/**
* @brief Generate a STOP condition after the current byte transfer (master mode).
* @rmtoll CR1 STOP LL_I2C_GenerateStopCondition
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_GenerateStopCondition(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_STOP);
}
/**
* @brief Enable bit POS (master/host mode).
* @note In that case, the ACK bit controls the (N)ACK of the next byte received or the PEC bit indicates that the next byte in shift register is a PEC.
* @rmtoll CR1 POS LL_I2C_EnableBitPOS
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableBitPOS(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_POS);
}
/**
* @brief Disable bit POS (master/host mode).
* @note In that case, the ACK bit controls the (N)ACK of the current byte received or the PEC bit indicates that the current byte in shift register is a PEC.
* @rmtoll CR1 POS LL_I2C_DisableBitPOS
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableBitPOS(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR1, I2C_CR1_POS);
}
/**
* @brief Check if bit POS is enabled or disabled.
* @rmtoll CR1 POS LL_I2C_IsEnabledBitPOS
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledBitPOS(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR1, I2C_CR1_POS) == (I2C_CR1_POS));
}
/**
* @brief Indicate the value of transfer direction.
* @note RESET: Bus is in read transfer (peripheral point of view).
* SET: Bus is in write transfer (peripheral point of view).
* @rmtoll SR2 TRA LL_I2C_GetTransferDirection
* @param I2Cx I2C Instance.
* @retval Returned value can be one of the following values:
* @arg @ref LL_I2C_DIRECTION_WRITE
* @arg @ref LL_I2C_DIRECTION_READ
*/
__STATIC_INLINE uint32_t LL_I2C_GetTransferDirection(I2C_TypeDef *I2Cx)
{
return (uint32_t)(READ_BIT(I2Cx->SR2, I2C_SR2_TRA));
}
/**
* @brief Enable DMA last transfer.
* @note This action mean that next DMA EOT is the last transfer.
* @rmtoll CR2 LAST LL_I2C_EnableLastDMA
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableLastDMA(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR2, I2C_CR2_LAST);
}
/**
* @brief Disable DMA last transfer.
* @note This action mean that next DMA EOT is not the last transfer.
* @rmtoll CR2 LAST LL_I2C_DisableLastDMA
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableLastDMA(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR2, I2C_CR2_LAST);
}
/**
* @brief Check if DMA last transfer is enabled or disabled.
* @rmtoll CR2 LAST LL_I2C_IsEnabledLastDMA
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledLastDMA(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR2, I2C_CR2_LAST) == (I2C_CR2_LAST));
}
/**
* @brief Enable transfer or internal comparison of the SMBus Packet Error byte (transmission or reception mode).
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @note This feature is cleared by hardware when the PEC byte is transferred or compared,
* or by a START or STOP condition, it is also cleared by software.
* @rmtoll CR1 PEC LL_I2C_EnableSMBusPECCompare
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_EnableSMBusPECCompare(I2C_TypeDef *I2Cx)
{
SET_BIT(I2Cx->CR1, I2C_CR1_PEC);
}
/**
* @brief Disable transfer or internal comparison of the SMBus Packet Error byte (transmission or reception mode).
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll CR1 PEC LL_I2C_DisableSMBusPECCompare
* @param I2Cx I2C Instance.
* @retval None
*/
__STATIC_INLINE void LL_I2C_DisableSMBusPECCompare(I2C_TypeDef *I2Cx)
{
CLEAR_BIT(I2Cx->CR1, I2C_CR1_PEC);
}
/**
* @brief Check if the SMBus Packet Error byte transfer or internal comparison is requested or not.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll CR1 PEC LL_I2C_IsEnabledSMBusPECCompare
* @param I2Cx I2C Instance.
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusPECCompare(I2C_TypeDef *I2Cx)
{
return (READ_BIT(I2Cx->CR1, I2C_CR1_PEC) == (I2C_CR1_PEC));
}
/**
* @brief Get the SMBus Packet Error byte calculated.
* @note Macro @ref IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not
* SMBus feature is supported by the I2Cx Instance.
* @rmtoll SR2 PEC LL_I2C_GetSMBusPEC
* @param I2Cx I2C Instance.
* @retval Value between Min_Data=0x00 and Max_Data=0xFF
*/
__STATIC_INLINE uint32_t LL_I2C_GetSMBusPEC(I2C_TypeDef *I2Cx)
{
return (uint32_t)(READ_BIT(I2Cx->SR2, I2C_SR2_PEC) >> I2C_SR2_PEC_Pos);
}
/**
* @brief Read Receive Data register.
* @rmtoll DR DR LL_I2C_ReceiveData8
* @param I2Cx I2C Instance.
* @retval Value between Min_Data=0x0 and Max_Data=0xFF
*/
__STATIC_INLINE uint8_t LL_I2C_ReceiveData8(I2C_TypeDef *I2Cx)
{
return (uint8_t)(READ_BIT(I2Cx->DR, I2C_DR_DR));
}
/**
* @brief Write in Transmit Data Register .
* @rmtoll DR DR LL_I2C_TransmitData8
* @param I2Cx I2C Instance.
* @param Data Value between Min_Data=0x0 and Max_Data=0xFF
* @retval None
*/
__STATIC_INLINE void LL_I2C_TransmitData8(I2C_TypeDef *I2Cx, uint8_t Data)
{
MODIFY_REG(I2Cx->DR, I2C_DR_DR, Data);
}
/**
* @}
*/
#if defined(USE_FULL_LL_DRIVER)
/** @defgroup I2C_LL_EF_Init Initialization and de-initialization functions
* @{
*/
uint32_t LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct);
uint32_t LL_I2C_DeInit(I2C_TypeDef *I2Cx);
void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct);
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */
/**
* @}
*/
/**
* @}
*/
#endif /* I2C1 || I2C2 || I2C3 */
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* __STM32F4xx_LL_I2C_H */
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