252 lines
8.3 KiB
C
252 lines
8.3 KiB
C
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/**
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******************************************************************************
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* @file stm32f4xx_ll_i2c.c
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* @author MCD Application Team
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* @brief I2C LL module driver.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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#if defined(USE_FULL_LL_DRIVER)
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_ll_i2c.h"
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#include "stm32f4xx_ll_bus.h"
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#include "stm32f4xx_ll_rcc.h"
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#ifdef USE_FULL_ASSERT
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#include "stm32_assert.h"
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#else
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#define assert_param(expr) ((void)0U)
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#endif
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/** @addtogroup STM32F4xx_LL_Driver
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* @{
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*/
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#if defined (I2C1) || defined (I2C2) || defined (I2C3)
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/** @defgroup I2C_LL I2C
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* @{
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*/
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/** @addtogroup I2C_LL_Private_Macros
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* @{
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*/
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#define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__) (((__VALUE__) == LL_I2C_MODE_I2C) || \
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((__VALUE__) == LL_I2C_MODE_SMBUS_HOST) || \
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((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \
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((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP))
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#define IS_LL_I2C_CLOCK_SPEED(__VALUE__) (((__VALUE__) > 0U) && ((__VALUE__) <= LL_I2C_MAX_SPEED_FAST))
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#define IS_LL_I2C_DUTY_CYCLE(__VALUE__) (((__VALUE__) == LL_I2C_DUTYCYCLE_2) || \
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((__VALUE__) == LL_I2C_DUTYCYCLE_16_9))
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#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
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#define IS_LL_I2C_ANALOG_FILTER(__VALUE__) (((__VALUE__) == LL_I2C_ANALOGFILTER_ENABLE) || \
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((__VALUE__) == LL_I2C_ANALOGFILTER_DISABLE))
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#define IS_LL_I2C_DIGITAL_FILTER(__VALUE__) ((__VALUE__) <= 0x0000000FU)
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#endif
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#define IS_LL_I2C_OWN_ADDRESS1(__VALUE__) ((__VALUE__) <= 0x000003FFU)
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#define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__) (((__VALUE__) == LL_I2C_ACK) || \
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((__VALUE__) == LL_I2C_NACK))
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#define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__) (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \
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((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT))
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/**
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* @}
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*/
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/* Private function prototypes -----------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @addtogroup I2C_LL_Exported_Functions
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* @{
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*/
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/** @addtogroup I2C_LL_EF_Init
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* @{
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*/
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/**
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* @brief De-initialize the I2C registers to their default reset values.
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* @param I2Cx I2C Instance.
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS I2C registers are de-initialized
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* - ERROR I2C registers are not de-initialized
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*/
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uint32_t LL_I2C_DeInit(I2C_TypeDef *I2Cx)
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{
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ErrorStatus status = SUCCESS;
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/* Check the I2C Instance I2Cx */
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assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
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if (I2Cx == I2C1)
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{
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/* Force reset of I2C clock */
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LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);
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/* Release reset of I2C clock */
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LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);
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}
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else if (I2Cx == I2C2)
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{
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/* Force reset of I2C clock */
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LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C2);
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/* Release reset of I2C clock */
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LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C2);
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}
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#if defined(I2C3)
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else if (I2Cx == I2C3)
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{
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/* Force reset of I2C clock */
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LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C3);
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/* Release reset of I2C clock */
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LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C3);
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}
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#endif
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else
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{
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status = ERROR;
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}
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return status;
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}
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/**
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* @brief Initialize the I2C registers according to the specified parameters in I2C_InitStruct.
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* @param I2Cx I2C Instance.
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* @param I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure.
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS I2C registers are initialized
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* - ERROR Not applicable
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*/
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uint32_t LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct)
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{
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LL_RCC_ClocksTypeDef rcc_clocks;
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/* Check the I2C Instance I2Cx */
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assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
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/* Check the I2C parameters from I2C_InitStruct */
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assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode));
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assert_param(IS_LL_I2C_CLOCK_SPEED(I2C_InitStruct->ClockSpeed));
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assert_param(IS_LL_I2C_DUTY_CYCLE(I2C_InitStruct->DutyCycle));
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#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
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assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter));
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assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter));
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#endif
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assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1));
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assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge));
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assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize));
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/* Disable the selected I2Cx Peripheral */
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LL_I2C_Disable(I2Cx);
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/* Retrieve Clock frequencies */
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LL_RCC_GetSystemClocksFreq(&rcc_clocks);
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#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
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/*---------------------------- I2Cx FLTR Configuration -----------------------
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* Configure the analog and digital noise filters with parameters :
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* - AnalogFilter: I2C_FLTR_ANFOFF bit
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* - DigitalFilter: I2C_FLTR_DNF[3:0] bits
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*/
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LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter);
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#endif
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/*---------------------------- I2Cx SCL Clock Speed Configuration ------------
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* Configure the SCL speed :
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* - ClockSpeed: I2C_CR2_FREQ[5:0], I2C_TRISE_TRISE[5:0], I2C_CCR_FS,
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* and I2C_CCR_CCR[11:0] bits
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* - DutyCycle: I2C_CCR_DUTY[7:0] bits
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*/
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LL_I2C_ConfigSpeed(I2Cx, rcc_clocks.PCLK1_Frequency, I2C_InitStruct->ClockSpeed, I2C_InitStruct->DutyCycle);
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/*---------------------------- I2Cx OAR1 Configuration -----------------------
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* Disable, Configure and Enable I2Cx device own address 1 with parameters :
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* - OwnAddress1: I2C_OAR1_ADD[9:8], I2C_OAR1_ADD[7:1] and I2C_OAR1_ADD0 bits
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* - OwnAddrSize: I2C_OAR1_ADDMODE bit
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*/
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LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize);
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/*---------------------------- I2Cx MODE Configuration -----------------------
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* Configure I2Cx peripheral mode with parameter :
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* - PeripheralMode: I2C_CR1_SMBUS, I2C_CR1_SMBTYPE and I2C_CR1_ENARP bits
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*/
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LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode);
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/* Enable the selected I2Cx Peripheral */
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LL_I2C_Enable(I2Cx);
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/*---------------------------- I2Cx CR2 Configuration ------------------------
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* Configure the ACKnowledge or Non ACKnowledge condition
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* after the address receive match code or next received byte with parameter :
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* - TypeAcknowledge: I2C_CR2_NACK bit
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*/
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LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge);
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return SUCCESS;
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}
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/**
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* @brief Set each @ref LL_I2C_InitTypeDef field to default value.
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* @param I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure.
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* @retval None
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*/
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void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct)
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{
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/* Set I2C_InitStruct fields to default values */
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I2C_InitStruct->PeripheralMode = LL_I2C_MODE_I2C;
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I2C_InitStruct->ClockSpeed = 5000U;
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I2C_InitStruct->DutyCycle = LL_I2C_DUTYCYCLE_2;
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#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
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I2C_InitStruct->AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
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I2C_InitStruct->DigitalFilter = 0U;
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#endif
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I2C_InitStruct->OwnAddress1 = 0U;
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I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK;
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I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* I2C1 || I2C2 || I2C3 */
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/**
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* @}
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*/
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#endif /* USE_FULL_LL_DRIVER */
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