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Diffstat (limited to 'lib/hal-stm32f1/include/stm32f1xx_ll_i2c.h')
| -rw-r--r-- | lib/hal-stm32f1/include/stm32f1xx_ll_i2c.h | 1802 |
1 files changed, 1802 insertions, 0 deletions
diff --git a/lib/hal-stm32f1/include/stm32f1xx_ll_i2c.h b/lib/hal-stm32f1/include/stm32f1xx_ll_i2c.h new file mode 100644 index 00000000..8d06c8ad --- /dev/null +++ b/lib/hal-stm32f1/include/stm32f1xx_ll_i2c.h @@ -0,0 +1,1802 @@ +/**
+ ******************************************************************************
+ * @file stm32f1xx_ll_i2c.h
+ * @author MCD Application Team
+ * @version V1.1.1
+ * @date 12-May-2017
+ * @brief Header file of I2C LL module.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32F1xx_LL_I2C_H
+#define __STM32F1xx_LL_I2C_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f1xx.h"
+
+/** @addtogroup STM32F1xx_LL_Driver
+ * @{
+ */
+
+#if defined (I2C1) || defined (I2C2)
+
+/** @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(). */
+
+ 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 */
+/**
+ * @}
+ */
+
+/** @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));
+}
+
+
+/**
+ * @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)
+{
+ register uint32_t freqrange = 0x0U;
+ register 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 occured.
+ * 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 */
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32F1xx_LL_I2C_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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