/**
* @brief I2C MSP Initialization
* This function configures the hardware resources used in this example:
* - Peripheral's clock enable
* - Peripheral's GPIO Configuration
* - DMA configuration for transmission request by peripheral
* - NVIC configuration for DMA interrupt request enable
* @param hi2c: I2C handle pointer
* @retval None
*/
void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{
static DMA_HandleTypeDef hdma_tx;
static DMA_HandleTypeDef hdma_rx;
GPIO_InitTypeDef GPIO_InitStruct;
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
I2Cx_SCL_GPIO_CLK_ENABLE();
I2Cx_SDA_GPIO_CLK_ENABLE();
/* Enable I2Cx clock */
I2Cx_CLK_ENABLE();
/* Enable DMAx clock */
I2Cx_DMA_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* I2C TX GPIO pin configuration */
GPIO_InitStruct.Pin = I2Cx_SCL_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = I2Cx_SCL_AF;
HAL_GPIO_Init(I2Cx_SCL_GPIO_PORT, &GPIO_InitStruct);
/* I2C RX GPIO pin configuration */
GPIO_InitStruct.Pin = I2Cx_SDA_PIN;
GPIO_InitStruct.Alternate = I2Cx_SDA_AF;
HAL_GPIO_Init(I2Cx_SDA_GPIO_PORT, &GPIO_InitStruct);
/*##-3- Configure the DMA ##################################################*/
/* Configure the DMA handler for Transmission process */
hdma_tx.Instance = I2Cx_DMA_CHANNEL_TX;
hdma_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_tx.Init.Mode = DMA_NORMAL;
hdma_tx.Init.Priority = DMA_PRIORITY_LOW;
HAL_DMA_Init(&hdma_tx);
/* Associate the initialized DMA handle to the the I2C handle */
__HAL_LINKDMA(hi2c, hdmatx, hdma_tx);
/* Configure the DMA handler for Transmission process */
hdma_rx.Instance = I2Cx_DMA_CHANNEL_RX;
hdma_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_rx.Init.Mode = DMA_NORMAL;
hdma_rx.Init.Priority = DMA_PRIORITY_HIGH;
HAL_DMA_Init(&hdma_rx);
/* Associate the initialized DMA handle to the the I2C handle */
__HAL_LINKDMA(hi2c, hdmarx, hdma_rx);
/*##-4- Configure the NVIC for DMA #########################################*/
/* NVIC configuration for DMA transfer complete interrupt (I2C1_TX) */
HAL_NVIC_SetPriority(I2Cx_DMA_TX_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(I2Cx_DMA_TX_IRQn);
/* NVIC configuration for DMA transfer complete interrupt (I2C1_RX) */
HAL_NVIC_SetPriority(I2Cx_DMA_RX_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(I2Cx_DMA_RX_IRQn);
}
/**
* @brief I2C MSP Initialization
* This function configures the hardware resources used in this example:
* - Peripheral's clock enable
* - Peripheral's GPIO Configuration
* - DMA configuration for transmission request by peripheral
* - NVIC configuration for DMA interrupt request enable
* @param hi2c: I2C handle pointer
* @retval None
*/
void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{
GPIO_InitTypeDef GPIO_InitStruct;
static DMA_HandleTypeDef hdma_tx;
static DMA_HandleTypeDef hdma_rx;
RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct;
/*##-1- Configure the I2C clock source. The clock is derived from the SYSCLK #*/
RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2Cx;
RCC_PeriphCLKInitStruct.I2c1ClockSelection = RCC_I2CxCLKSOURCE_SYSCLK;
HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct);
/*##-2- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
I2Cx_SCL_GPIO_CLK_ENABLE();
I2Cx_SDA_GPIO_CLK_ENABLE();
/* Enable I2Cx clock */
I2Cx_CLK_ENABLE();
/* Enable DMAx clock */
I2Cx_DMA_CLK_ENABLE();
/*##-3- Configure peripheral GPIO ##########################################*/
/* I2C TX GPIO pin configuration */
GPIO_InitStruct.Pin = I2Cx_SCL_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = I2Cx_SCL_SDA_AF;
HAL_GPIO_Init(I2Cx_SCL_GPIO_PORT, &GPIO_InitStruct);
/* I2C RX GPIO pin configuration */
GPIO_InitStruct.Pin = I2Cx_SDA_PIN;
GPIO_InitStruct.Alternate = I2Cx_SCL_SDA_AF;
HAL_GPIO_Init(I2Cx_SDA_GPIO_PORT, &GPIO_InitStruct);
/*##-4- Configure the DMA Channels #########################################*/
/* Configure the DMA handler for Transmission process */
hdma_tx.Instance = I2Cx_DMA_INSTANCE_TX;
hdma_tx.Init.Request = I2Cx_DMA_REQUEST_TX;
hdma_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_tx.Init.Mode = DMA_NORMAL;
hdma_tx.Init.Priority = DMA_PRIORITY_LOW;
HAL_DMA_Init(&hdma_tx);
/* Associate the initialized DMA handle to the the I2C handle */
__HAL_LINKDMA(hi2c, hdmatx, hdma_tx);
/* Configure the DMA handler for Transmission process */
hdma_rx.Instance = I2Cx_DMA_INSTANCE_RX;
hdma_rx.Init.Request = I2Cx_DMA_REQUEST_RX;
hdma_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_rx.Init.Mode = DMA_NORMAL;
hdma_rx.Init.Priority = DMA_PRIORITY_HIGH;
HAL_DMA_Init(&hdma_rx);
/* Associate the initialized DMA handle to the the I2C handle */
__HAL_LINKDMA(hi2c, hdmarx, hdma_rx);
/*##-5- Configure the NVIC for DMA #########################################*/
/* NVIC configuration for DMA transfer complete interrupt (I2Cx_TX) */
HAL_NVIC_SetPriority(I2Cx_DMA_TX_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(I2Cx_DMA_TX_IRQn);
/* NVIC configuration for DMA transfer complete interrupt (I2Cx_RX) */
HAL_NVIC_SetPriority(I2Cx_DMA_RX_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(I2Cx_DMA_RX_IRQn);
}
