1144 lines
41 KiB
C
1144 lines
41 KiB
C
/*
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******************************************************************************
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* @file HAL_I2C.c
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* @version V1.0.0
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* @date 2020
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* @brief I2C HAL module driver.
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* This file provides firmware functions to manage the following
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* functionalities of the Inter Integrated Circuit (I2C) peripheral:
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* @ Initialization and de-initialization functions
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* @ IO operation functions
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* @ Peripheral Control functions
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******************************************************************************
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*/
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#include "ACM32Fxx_HAL.h"
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/* Private functions for I2C */
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static HAL_StatusTypeDef I2C_Set_Clock_Speed(I2C_HandleTypeDef *hi2c, uint32_t ClockSpeed);
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static HAL_StatusTypeDef I2C_Master_Request_Write(I2C_HandleTypeDef *hi2c, uint8_t DevAddress, uint32_t Timeout);
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static HAL_StatusTypeDef I2C_Master_Request_Read(I2C_HandleTypeDef *hi2c, uint8_t DevAddress, uint32_t Timeout);
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static HAL_StatusTypeDef I2C_Check_Device_Ready(I2C_HandleTypeDef *hi2c, uint8_t DevAddress, uint32_t Timeout);
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static HAL_StatusTypeDef I2C_WaitOnFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, FlagStatus Status, uint32_t Timeout);
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/************************************************************************
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* function : HAL_I2C_IRQHandler
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* Description: This function handles I2C interrupt request.
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* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for I2C module
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************************************************************************/
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__weak void HAL_I2C_IRQHandler(I2C_HandleTypeDef *hi2c)
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{
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uint32_t i;
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/* Slave ADDR1 Interrupt */
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if (READ_BIT(hi2c->Instance->SR, I2C_SR_RX_ADDR1))
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{
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/* Clear ADDR1 Interrupt Flag */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_RX_ADDR1);
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/* Slave Transmit */
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if (READ_BIT(hi2c->Instance->SR, I2C_SR_SRW))
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{
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i = 1;
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/* Wait for transmission End*/
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while(!READ_BIT(hi2c->Instance->SR, I2C_SR_MTF));
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/* Clear MTF */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
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/* BUS BUSY */
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while(READ_BIT(hi2c->Instance->SR, I2C_SR_BUS_BUSY))
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{
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if (i >= hi2c->Tx_Size && hi2c->Tx_Size != 0)
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{
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break;
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}
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if (READ_BIT(hi2c->Instance->SR, I2C_SR_MTF))
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{
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/* Clear MTF */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
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}
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if (READ_BIT(hi2c->Instance->SR, I2C_SR_TXE))
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{
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hi2c->Instance->DR = hi2c->Tx_Buffer[i++];
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hi2c->Tx_Count++;
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}
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}
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/* Set Slave machine is DILE */
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hi2c->Slave_TxState = SLAVE_TX_STATE_IDLE;
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}
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/* Slave Receive */
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else
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{
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i = 0;
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/* Wait for transmission End*/
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while(!READ_BIT(hi2c->Instance->SR, I2C_SR_MTF));
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/* Clear MTF */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
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/* BUS BUSY */
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while(READ_BIT(hi2c->Instance->SR, I2C_SR_BUS_BUSY))
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{
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/* Receive Data */
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if (READ_BIT(hi2c->Instance->SR, I2C_SR_RXNE))
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{
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hi2c->Rx_Buffer[i++] = hi2c->Instance->DR;
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/* Wait for transmission End*/
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while(!READ_BIT(hi2c->Instance->SR, I2C_SR_MTF));
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/* Clear MTF */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
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hi2c->Rx_Count++;
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if (hi2c->Rx_Size != 0)
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{
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if (i >= hi2c->Rx_Size)
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{
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break;
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}
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}
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}
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}
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/* Set Slave machine is DILE */
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hi2c->Slave_RxState = SLAVE_RX_STATE_IDLE;
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}
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if (hi2c->Slave_RxState == SLAVE_RX_STATE_IDLE && hi2c->Slave_TxState == SLAVE_TX_STATE_IDLE)
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{
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/* Disable RX_ADDR1_INT_EN */
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CLEAR_BIT(hi2c->Instance->CR, I2C_CR_RX_ADDR1_INT_EN);
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}
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}
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/* STOP Flag Interrupt */
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if (READ_BIT(hi2c->Instance->SR, I2C_SR_STOPF))
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{
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/* Clear STOPF Interrupt Flag */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_STOPF);
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/* Clear STOPF */
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CLEAR_BIT(hi2c->Instance->CR, I2C_CR_STOPF_INTEN);
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if (hi2c->I2C_STOPF_Callback != NULL)
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{
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hi2c->I2C_STOPF_Callback();
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}
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}
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}
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/************************************************************************
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* function : HAL_I2C_MspInit
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* Description:
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* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for I2C module
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************************************************************************/
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__weak void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
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{
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/*
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NOTE : This function should be modified by the user.
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*/
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/* For Example */
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GPIO_InitTypeDef GPIO_Handle;
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/* I2C1 */
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if (hi2c->Instance == I2C1)
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{
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/* Enable Clock */
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System_Module_Enable(EN_I2C1);
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System_Module_Enable(EN_GPIOAB);
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/* I2C1 SDA PortB Pin7 */
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/* I2C1 SCL PortB Pin6 */
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GPIO_Handle.Pin = GPIO_PIN_6 | GPIO_PIN_7;
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GPIO_Handle.Mode = GPIO_MODE_AF_PP;
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GPIO_Handle.Pull = GPIO_PULLUP;
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GPIO_Handle.Alternate = GPIO_FUNCTION_6;
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HAL_GPIO_Init(GPIOB, &GPIO_Handle);
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/* Clear Pending Interrupt */
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NVIC_ClearPendingIRQ(I2C1_IRQn);
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/* Enable External Interrupt */
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NVIC_EnableIRQ(I2C1_IRQn);
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}
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/* I2C2 */
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else if (hi2c->Instance == I2C2)
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{
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}
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}
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/************************************************************************
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* function : HAL_I2C_MspDeInit
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* Description:
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* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for I2C module
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************************************************************************/
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__weak void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c)
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{
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/*
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NOTE : This function should be modified by the user.
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*/
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/* For Example */
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GPIO_InitTypeDef GPIO_Handle;
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/* I2C1 */
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if (hi2c->Instance == I2C1)
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{
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/* Disable Clock */
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System_Module_Disable(EN_I2C1);
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/* I2C1 SDA PortB Pin7 */
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/* I2C1 SCL PortB Pin6 */
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HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6 | GPIO_PIN_7);
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/* Clear Pending Interrupt */
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NVIC_ClearPendingIRQ(I2C1_IRQn);
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/* Disable External Interrupt */
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NVIC_DisableIRQ(I2C1_IRQn);
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}
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/* I2C2 */
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else if (hi2c->Instance == I2C2)
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{
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}
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}
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/************************************************************************
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* function : HAL_I2C_Init
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* Description: I2c initial with parameters.
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* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for I2C module
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************************************************************************/
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HAL_StatusTypeDef HAL_I2C_Init(I2C_HandleTypeDef *hi2c)
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{
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/* Check I2C Parameter */
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if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
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if (!IS_I2C_ALL_MODE(hi2c->Init.I2C_Mode)) return HAL_ERROR;
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if (!IS_I2C_CLOCK_SPEED(hi2c->Init.Clock_Speed)) return HAL_ERROR;
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if (!IS_I2C_TX_AUTO_EN(hi2c->Init.Tx_Auto_En)) return HAL_ERROR;
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if (!IS_I2C_STRETCH_EN(hi2c->Init.No_Stretch_Mode)) return HAL_ERROR;
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/* Disable the selected I2C peripheral */
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CLEAR_BIT(hi2c->Instance->CR, I2C_CR_MEN);
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/* Init the low level hardware : GPIO, CLOCK, NVIC */
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HAL_I2C_MspInit(hi2c);
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switch (hi2c->Init.I2C_Mode)
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{
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/* Master Mode */
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case I2C_MODE_MASTER:
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{
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/* Set Master Mode */
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SET_BIT(hi2c->Instance->CR, I2C_CR_MASTER);
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/* Set Clock Speed */
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I2C_Set_Clock_Speed(hi2c, hi2c->Init.Clock_Speed);
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/* Set SDA auto change the direction */
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if (hi2c->Init.Tx_Auto_En == TX_AUTO_EN_ENABLE)
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SET_BIT(hi2c->Instance->CR, I2C_CR_TX_AUTO_EN);
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else
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CLEAR_BIT(hi2c->Instance->CR, I2C_CR_TX_AUTO_EN);
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/* Enable the selected I2C peripheral */
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SET_BIT(hi2c->Instance->CR, I2C_CR_MEN);
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}break;
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/* Slave Mode */
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case I2C_MODE_SLAVE:
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{
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SET_BIT(hi2c->Instance->CR, I2C_CR_TXE_SEL);
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/* Set SDA auto change the direction */
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if (hi2c->Init.Tx_Auto_En == TX_AUTO_EN_ENABLE)
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SET_BIT(hi2c->Instance->CR, I2C_CR_TX_AUTO_EN);
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else
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CLEAR_BIT(hi2c->Instance->CR, I2C_CR_TX_AUTO_EN);
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/* Set Clock Stretch Mode */
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if (hi2c->Init.No_Stretch_Mode == NO_STRETCH_MODE_NOSTRETCH)
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SET_BIT(hi2c->Instance->CR, I2C_CR_NOSTRETCH);
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else
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CLEAR_BIT(hi2c->Instance->CR, I2C_CR_NOSTRETCH);
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/* Set Address 1 */
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hi2c->Instance->SLAVE_ADDR1 = hi2c->Init.Own_Address;
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/* Enable the selected I2C peripheral */
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SET_BIT(hi2c->Instance->CR, I2C_CR_MEN);
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}break;
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default: break;
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}
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return HAL_OK;
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}
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/************************************************************************
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* function : HAL_I2C_DeInit
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* Description: I2c De-initial with parameters.
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* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for I2C module
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************************************************************************/
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HAL_StatusTypeDef HAL_I2C_DeInit(I2C_HandleTypeDef *hi2c)
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{
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/* Check I2C Parameter */
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if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
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hi2c->Slave_RxState = SLAVE_RX_STATE_IDLE;
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hi2c->Slave_TxState = SLAVE_TX_STATE_IDLE;
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HAL_I2C_MspDeInit(hi2c);
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hi2c->Tx_Size = 0;
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hi2c->Rx_Size = 0;
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hi2c->Tx_Count = 0;
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hi2c->Rx_Count = 0;
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return HAL_OK;
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}
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/************************************************************************
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* function : HAL_I2C_Master_Transmit
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* Description: Transmits in master mode an amount of data in blocking mode.
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* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for I2C module
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* DevAddress : Target device address
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* pData : Pointer to data buffer
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* Size : Amount of data to be sent
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* Timeout : Timeout value
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************************************************************************/
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HAL_StatusTypeDef HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
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{
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uint32_t i;
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/* Check I2C Parameter */
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if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
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hi2c->Tx_Buffer = pData;
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hi2c->Tx_Size = Size;
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hi2c->Tx_Count = 0;
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/* Send Write Access Request */
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if (I2C_Master_Request_Write(hi2c, DevAddress, 0) == HAL_OK)
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{
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for (i = 0; i < hi2c->Tx_Size; i++)
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{
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/* Wait TXE Flag */
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_TXE, RESET, Timeout) != HAL_OK) return HAL_ERROR;
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/* Send Data */
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hi2c->Instance->DR = hi2c->Tx_Buffer[hi2c->Tx_Count++];
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/* Wait for transmission End*/
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
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/* Clear MTF */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
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/* Get NACK */
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if (READ_BIT(hi2c->Instance->SR, I2C_SR_RACK))
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{
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/* Generate Stop */
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SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
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/* Wait for the bus to idle */
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
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return HAL_ERROR;
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}
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}
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/* Generate Stop */
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SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
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/* Wait for the bus to idle */
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
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}
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else
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{
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return HAL_ERROR;
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}
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return HAL_OK;
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}
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/************************************************************************
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* function : HAL_I2C_Master_Receive
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* Description: Transmits in master mode an amount of data in blocking mode.
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* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for I2C module
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* DevAddress : Target device address
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* pData : Pointer to data buffer
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* Size : Amount of data to be Receive
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* Timeout : Timeout value
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************************************************************************/
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HAL_StatusTypeDef HAL_I2C_Master_Receive(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
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{
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uint32_t i;
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/* Check I2C Parameter */
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if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
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hi2c->Rx_Buffer = pData;
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hi2c->Rx_Size = Size;
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hi2c->Rx_Count = 0;
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/* Send Read Access Request */
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if (I2C_Master_Request_Read(hi2c, DevAddress, Timeout) == HAL_OK)
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{
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/* Wait Master Transition receiving state */
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_TX_RX_FLAG, RESET, Timeout) != HAL_OK) return HAL_ERROR;
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/* Clear TX_RX_FLAG */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_TX_RX_FLAG);
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/* Generate ACK */
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CLEAR_BIT(hi2c->Instance->CR, I2C_CR_TACK);
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for (i = 0; i < hi2c->Rx_Size - 1; i++)
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{
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/* Wait RXNE Flag */
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_RXNE, RESET, Timeout) != HAL_OK) return HAL_ERROR;
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/* Read Data */
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hi2c->Rx_Buffer[hi2c->Rx_Count++] = hi2c->Instance->DR;
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/* Wait for transmission End*/
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
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/* Clear MTF */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
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}
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/* Prepare for Generate NACK */
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SET_BIT(hi2c->Instance->CR, I2C_CR_TACK);
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/* Prepare for Generate STOP */
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SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
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/* Wait RXNE Flag */
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_RXNE, RESET, Timeout) != HAL_OK) return HAL_ERROR;
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/* Read Data */
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hi2c->Rx_Buffer[hi2c->Rx_Count++] = hi2c->Instance->DR;
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/* Wait for transmission End*/
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
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/* Clear MTF */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
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/* Wait for the bus to idle */
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
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/* Generate ACK */
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CLEAR_BIT(hi2c->Instance->CR, I2C_CR_TACK);
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}
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else
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{
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return HAL_ERROR;
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}
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return HAL_OK;
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}
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/************************************************************************
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* function : HAL_I2C_Slave_Transmit
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* Description: Transmits in Slave mode an amount of data in blocking mode.
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* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for I2C module
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* pData : Pointer to data buffer
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* Size : Amount of data to be sent
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* Timeout : Timeout value
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************************************************************************/
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HAL_StatusTypeDef HAL_I2C_Slave_Transmit(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint32_t Size, uint32_t Timeout)
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{
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uint32_t i = 0;
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/* Check I2C Parameter */
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if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
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hi2c->Tx_Buffer = pData;
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hi2c->Tx_Size = Size;
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hi2c->Tx_Count = 0;
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/* Clear RX_ADDR1 Flag */
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hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_RX_ADDR1);
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/* Match the Address 1 */
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if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_RX_ADDR1, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear RX_ADDR1 Flag */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_RX_ADDR1);
|
|
|
|
/* Slave Transmit */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_SRW))
|
|
{
|
|
/* BUS BUSY */
|
|
while(READ_BIT(hi2c->Instance->SR, I2C_SR_BUS_BUSY))
|
|
{
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_MTF))
|
|
{
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
hi2c->Tx_Count++;
|
|
}
|
|
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_TXE))
|
|
{
|
|
if (i < hi2c->Tx_Size || hi2c->Tx_Size == 0)
|
|
{
|
|
hi2c->Instance->DR = hi2c->Tx_Buffer[i++];
|
|
}
|
|
}
|
|
}
|
|
hi2c->Instance->SR = READ_REG(hi2c->Instance->SR);
|
|
}
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
hi2c->Tx_Count--;
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_Slave_Transmit_IT
|
|
* Description: Transmit in slave mode an amount of data in non-blocking mode with Interrupt
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* pData : Pointer to data buffer
|
|
* Size : Amount of data to be sent
|
|
* return : HAL_StatusTypeDef
|
|
************************************************************************/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Transmit_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint32_t Size)
|
|
{
|
|
/* Check I2C Parameter */
|
|
if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
|
|
|
|
/* Rx machine is running */
|
|
if (hi2c->Slave_TxState != SLAVE_TX_STATE_IDLE)
|
|
return HAL_ERROR;
|
|
|
|
/* Set Slave machine is sending */
|
|
hi2c->Slave_TxState = SLAVE_TX_STATE_SENDING;
|
|
|
|
hi2c->Tx_Buffer = pData;
|
|
hi2c->Tx_Size = Size;
|
|
hi2c->Tx_Count = 0;
|
|
|
|
CLEAR_BIT(hi2c->Instance->CR, I2C_CR_TXE_SEL);
|
|
|
|
hi2c->Instance->DR = hi2c->Tx_Buffer[0];
|
|
|
|
hi2c->Tx_Count++;
|
|
|
|
/* Clear RX ADDR1 Flag */
|
|
SET_BIT(hi2c->Instance->SR, I2C_SR_RX_ADDR1);
|
|
/* RX ADDR1 Interrupt Enable */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_RX_ADDR1_INT_EN);
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_Slave_Receive
|
|
* Description: Receive in Slave mode an amount of data in blocking mode.
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* pData : Pointer to data buffer
|
|
* Size : Amount of data to be sent
|
|
* Timeout : Timeout value
|
|
* return : HAL_StatusTypeDef
|
|
************************************************************************/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Receive(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint32_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t i = 0;
|
|
HAL_StatusTypeDef Status;
|
|
|
|
/* Check I2C Parameter */
|
|
if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;;
|
|
|
|
hi2c->Rx_Buffer = pData;
|
|
hi2c->Rx_Size = Size;
|
|
hi2c->Rx_Count = 0;
|
|
|
|
/* Match the Address 1 */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_RX_ADDR1, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear RX_ADDR1 Flag */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_RX_ADDR1);
|
|
|
|
/* Slave Receive */
|
|
if (!READ_BIT(hi2c->Instance->SR, I2C_SR_SRW))
|
|
{
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* BUS BUSY */
|
|
while(READ_BIT(hi2c->Instance->SR, I2C_SR_BUS_BUSY))
|
|
{
|
|
/* Receive Data */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_RXNE))
|
|
{
|
|
hi2c->Rx_Buffer[hi2c->Rx_Count++] = hi2c->Instance->DR;
|
|
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
if (hi2c->Rx_Size != 0)
|
|
{
|
|
if (hi2c->Rx_Count >= hi2c->Rx_Size)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Generate ACK */
|
|
CLEAR_BIT(hi2c->Instance->CR, I2C_CR_TACK);
|
|
|
|
hi2c->Instance->SR = READ_REG(hi2c->Instance->SR);
|
|
}
|
|
/* Slave Transmit */
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_Slave_Receive_IT
|
|
* Description: Receive in slave mode an amount of data in non-blocking mode with Interrupt
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* pData : Pointer to data buffer
|
|
* Size : Amount of data to be sent
|
|
************************************************************************/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Receive_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint32_t Size)
|
|
{
|
|
/* Check I2C Parameter */
|
|
if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
|
|
|
|
/* Rx machine is running */
|
|
if (hi2c->Slave_RxState != SLAVE_RX_STATE_IDLE)
|
|
return HAL_ERROR;
|
|
|
|
/* Set Slave machine is receiving */
|
|
hi2c->Slave_RxState = SLAVE_RX_STATE_RECEIVING;
|
|
|
|
hi2c->Rx_Buffer = pData;
|
|
hi2c->Rx_Size = Size;
|
|
hi2c->Rx_Count = 0;
|
|
|
|
/* Clear RX ADDR1 Flag */
|
|
SET_BIT(hi2c->Instance->SR, I2C_SR_RX_ADDR1);
|
|
/* RX ADDR1 Interrupt Enable */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_RX_ADDR1_INT_EN);
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_Slave_Receive_DMA
|
|
* Description: Receive in slave mode an amount of data in non-blocking mode with DMA
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* pData : Pointer to data buffer
|
|
* Size : Amount of data to be sent
|
|
************************************************************************/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Receive_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint32_t Size)
|
|
{
|
|
/* Check I2C Parameter */
|
|
if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
|
|
|
|
hi2c->Rx_Buffer = pData;
|
|
hi2c->Rx_Size = Size;
|
|
hi2c->Rx_Count = Size;
|
|
|
|
/* DMA Enable */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_DMA_EN);
|
|
|
|
/* Clear STOPF Interrupt Flag */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_STOPF);
|
|
/* STOPF Interrupt Enable */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOPF_INTEN);
|
|
|
|
HAL_DMA_Start(hi2c->HDMA_Rx, (uint32_t)&hi2c->Instance->DR, (uint32_t)hi2c->Rx_Buffer, hi2c->Rx_Size);
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_Slave_Transmit_DMA
|
|
* Description: Transmit in slave mode an amount of data in non-blocking mode with DMA
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* pData : Pointer to data buffer
|
|
* Size : Amount of data to be sent
|
|
************************************************************************/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint32_t Size)
|
|
{
|
|
/* Check I2C Parameter */
|
|
if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
|
|
|
|
hi2c->Tx_Buffer = pData;
|
|
hi2c->Tx_Size = Size;
|
|
hi2c->Tx_Count = Size;
|
|
|
|
/* Must Set TXE_SEL In DMA Mode !!! */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_TXE_SEL);
|
|
/* DMA Enable */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_DMA_EN);
|
|
|
|
HAL_DMA_Start_IT(hi2c->HDMA_Tx, (uint32_t)hi2c->Tx_Buffer, (uint32_t)&hi2c->Instance->DR, hi2c->Tx_Size);
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_Mem_Write
|
|
* Description: Write an amount of data in blocking mode to a specific memory address
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* DevAddress : Target device address
|
|
* MemAddress : MemAddress Internal memory address
|
|
* MemAddSize : MemAddSize Size of internal memory address
|
|
* pData : Pointer to data buffer
|
|
* Size : Amount of data to be sent
|
|
* Timeout : Timeout value
|
|
************************************************************************/
|
|
HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint8_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t i;
|
|
|
|
/* Check I2C Parameter */
|
|
if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
|
|
|
|
hi2c->Tx_Buffer = pData;
|
|
hi2c->Tx_Size = Size;
|
|
hi2c->Tx_Count = 0;
|
|
|
|
/* Bus Busy */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_BUS_BUSY))
|
|
return HAL_ERROR;
|
|
|
|
/* Send Write Access Request */
|
|
if (I2C_Master_Request_Write(hi2c, DevAddress,0) == HAL_OK)
|
|
{
|
|
/* If Memory address size is 8Bit */
|
|
if (MemAddSize == I2C_MEMADD_SIZE_8BIT)
|
|
{
|
|
/* Send Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(MemAddress);
|
|
}
|
|
/* If Memory address size is 16Bit */
|
|
else
|
|
{
|
|
/* Send Memory Address MSB*/
|
|
hi2c->Instance->DR = I2C_MEM_ADD_MSB(MemAddress);
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
/* Send Memory Address LSB*/
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(MemAddress);
|
|
}
|
|
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Get NACK */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_RACK))
|
|
{
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
/* Get ACK */
|
|
else
|
|
{
|
|
for (i = 0; i < hi2c->Tx_Size; i++)
|
|
{
|
|
/* Wait TXE Flag */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_TXE, RESET, Timeout)!= HAL_OK) return HAL_ERROR;
|
|
|
|
/* Send Data */
|
|
hi2c->Instance->DR = hi2c->Tx_Buffer[hi2c->Tx_Count++];
|
|
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Get NACK */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_RACK))
|
|
{
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Check Device Ready */
|
|
while(I2C_Check_Device_Ready(hi2c, DevAddress, Timeout) != HAL_OK);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_Mem_Read
|
|
* Description: Read an amount of data in blocking mode to a specific memory address
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* DevAddress : Target device address
|
|
* MemAddress : MemAddress Internal memory address
|
|
* MemAddSize : MemAddSize Size of internal memory address
|
|
* pData : Pointer to data buffer
|
|
* Size : Amount of data to be sent
|
|
* Timeout : Timeout value
|
|
************************************************************************/
|
|
HAL_StatusTypeDef HAL_I2C_Mem_Read(I2C_HandleTypeDef *hi2c, uint8_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t i;
|
|
|
|
/* Check I2C Parameter */
|
|
if (!IS_I2C_ALL_INSTANCE(hi2c->Instance)) return HAL_ERROR;
|
|
|
|
hi2c->Rx_Buffer = pData;
|
|
hi2c->Rx_Size = Size;
|
|
hi2c->Rx_Count = 0;
|
|
|
|
/* Bus Busy */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_BUS_BUSY))
|
|
return HAL_ERROR;
|
|
|
|
/* Send Write Access Request */
|
|
if (I2C_Master_Request_Write(hi2c, DevAddress,0) == HAL_OK)
|
|
{
|
|
/* If Memory address size is 8Bit */
|
|
if (MemAddSize == I2C_MEMADD_SIZE_8BIT)
|
|
{
|
|
/* Send Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(MemAddress);
|
|
}
|
|
/* If Memory address size is 16Bit */
|
|
else
|
|
{
|
|
/* Send Memory Address MSB*/
|
|
hi2c->Instance->DR = I2C_MEM_ADD_MSB(MemAddress);
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
/* Send Memory Address LSB*/
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(MemAddress);
|
|
}
|
|
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Get NACK */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_RACK))
|
|
{
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
/* Get ACK */
|
|
else
|
|
{
|
|
/* Send Write Read Request */
|
|
if (I2C_Master_Request_Read(hi2c, DevAddress, Timeout) == HAL_OK)
|
|
{
|
|
/* Wait Master Transition receiving state */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_TX_RX_FLAG, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear TX_RX_FLAG */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_TX_RX_FLAG);
|
|
|
|
/* Generate ACK */
|
|
CLEAR_BIT(hi2c->Instance->CR, I2C_CR_TACK);
|
|
|
|
for (i = 0; i < hi2c->Rx_Size - 1; i++)
|
|
{
|
|
/* Wait RXNE Flag */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_RXNE, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Read Data */
|
|
hi2c->Rx_Buffer[hi2c->Rx_Count++] = hi2c->Instance->DR;
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
}
|
|
|
|
/* Prepare for Generate NACK */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_TACK);
|
|
/* Prepare for Generate STOP */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait RXNE Flag */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_RXNE, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Read Data */
|
|
hi2c->Rx_Buffer[hi2c->Rx_Count++] = hi2c->Instance->DR;
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Generate ACK */
|
|
CLEAR_BIT(hi2c->Instance->CR, I2C_CR_TACK);
|
|
}
|
|
else
|
|
{
|
|
/* Get NACK */
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_GetSlaveRxState
|
|
* Description: Get Slave Rx State
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* return : Slave State
|
|
************************************************************************/
|
|
uint8_t HAL_I2C_GetSlaveRxState(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
return hi2c->Slave_RxState;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : HAL_I2C_GetSlaveTxState
|
|
* Description: Get Slave Tx State
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* return : Slave State
|
|
************************************************************************/
|
|
uint8_t HAL_I2C_GetSlaveTxState(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
return hi2c->Slave_TxState;
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : I2C_Set_Clock_Speed
|
|
* Description: Set I2C Clock Speed
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* ClockSpeed: I2C Clock Speed
|
|
************************************************************************/
|
|
static HAL_StatusTypeDef I2C_Set_Clock_Speed(I2C_HandleTypeDef *hi2c, uint32_t ClockSpeed)
|
|
{
|
|
uint32_t APB_Clock;
|
|
|
|
APB_Clock = System_Get_APBClock();
|
|
|
|
hi2c->Instance->CLK_DIV = APB_Clock / (4 * ClockSpeed) - 1;
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C Communication Timeout.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @param Flag specifies the I2C flag to check.
|
|
* @param Status The new Flag status (SET or RESET).
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_WaitOnFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, FlagStatus Status, uint32_t Timeout)
|
|
{
|
|
__IO uint32_t lu32_Timeout;
|
|
/* have no timeout */
|
|
if (Timeout == 0)
|
|
{
|
|
while (__HAL_I2C_GET_FLAG(hi2c, Flag)==Status);
|
|
}
|
|
else
|
|
{
|
|
lu32_Timeout = Timeout * 0xFF;
|
|
|
|
while (__HAL_I2C_GET_FLAG(hi2c, Flag)==Status)
|
|
{
|
|
if (lu32_Timeout-- == 0)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
/************************************************************************
|
|
* function : I2C_Master_Request_Write
|
|
* Description: I2C Write Access Request
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure
|
|
* DevAddress: Device address
|
|
* Timeout: Timeout value
|
|
************************************************************************/
|
|
static HAL_StatusTypeDef I2C_Master_Request_Write(I2C_HandleTypeDef *hi2c, uint8_t DevAddress, uint32_t Timeout)
|
|
{
|
|
/* Generate Start */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_START);
|
|
|
|
/* Clear MTF, To Prevent Errors */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Send Device Address */
|
|
hi2c->Instance->DR = DevAddress & 0xFE;
|
|
|
|
/* Wait for transmission End*/
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Get NACK */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_RACK))
|
|
{
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
/* Get ACK */
|
|
else
|
|
{
|
|
return HAL_OK;
|
|
}
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : I2C_Master_Request_Read
|
|
* Description: I2C Read Access Request
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure
|
|
* DevAddress: Device address
|
|
* Timeout: Timeout value
|
|
************************************************************************/
|
|
static HAL_StatusTypeDef I2C_Master_Request_Read(I2C_HandleTypeDef *hi2c, uint8_t DevAddress, uint32_t Timeout)
|
|
{
|
|
/* Generate Start */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_START);
|
|
|
|
/* Clear MTF, To Prevent Errors */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Send Device Address */
|
|
hi2c->Instance->DR = DevAddress | 0x01;
|
|
|
|
/* Wait for transmission End */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Get NACK */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_RACK))
|
|
{
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
/* Get ACK */
|
|
else
|
|
{
|
|
return HAL_OK;
|
|
}
|
|
}
|
|
|
|
/************************************************************************
|
|
* function : I2C_Check_Device_Ready
|
|
* Description: Check Device Ready
|
|
* input : hi2c : pointer to a I2C_HandleTypeDef structure
|
|
* DevAddress: Device address
|
|
* Timeout: Timeout value
|
|
************************************************************************/
|
|
static HAL_StatusTypeDef I2C_Check_Device_Ready(I2C_HandleTypeDef *hi2c, uint8_t DevAddress, uint32_t Timeout)
|
|
{
|
|
/* Bus Busy */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_BUS_BUSY))
|
|
return HAL_ERROR;
|
|
|
|
/* Generate Start */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_START);
|
|
|
|
/* Send Device Address */
|
|
hi2c->Instance->DR = DevAddress;
|
|
|
|
/* Wait for transmission End */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_MTF, RESET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
/* Clear MTF */
|
|
hi2c->Instance->SR = READ_BIT(hi2c->Instance->SR, I2C_SR_MTF);
|
|
|
|
/* Get NACK */
|
|
if (READ_BIT(hi2c->Instance->SR, I2C_SR_RACK))
|
|
{
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
/* Get ACK */
|
|
else
|
|
{
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR, I2C_CR_STOP);
|
|
|
|
/* Wait for the bus to idle */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_SR_BUS_BUSY, SET, Timeout) != HAL_OK) return HAL_ERROR;
|
|
|
|
return HAL_OK;
|
|
}
|
|
}
|