/**
* @brief Enable the DMA clock and initialize needed DMA Streams
* used by the I2C device.
* @param Device : I2C Device instance.
* @param Direction : Transfer direction.
* @param Options : Transfer Options.
* @retval None.
*/
void CPAL_I2C_HAL_DMAInit(CPAL_DevTypeDef Device, CPAL_DirectionTypeDef Direction, uint32_t Options)
{
/* Enable I2Cx DMA */
__DMA_CLK_CMD(CPAL_I2C_DMA_CLK[Device], ENABLE);
/* I2Cx Common Stream Configuration */
CPAL_DMA_InitStructure.DMA_Channel = CPAL_I2C_DMA_CHANNEL[Device];
CPAL_DMA_InitStructure.DMA_Memory0BaseAddr = 0;
CPAL_DMA_InitStructure.DMA_BufferSize = 0;
CPAL_DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
CPAL_DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
CPAL_DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
CPAL_DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
CPAL_DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
CPAL_DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
CPAL_DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
CPAL_DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull;
CPAL_DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
CPAL_DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
/* Select I2Cx DR Address register as DMA PeripheralBaseAddress */
CPAL_DMA_InitStructure.DMA_PeripheralBaseAddr = CPAL_I2C_DR [Device];
/* If TX Direction (Transmission) selected */
if ((Direction & CPAL_DIRECTION_TX) != 0)
{
/* Select Memory to Peripheral transfer direction */
CPAL_DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
/* Initialize I2Cx DMA Tx Stream */
DMA_Init((DMA_Stream_TypeDef*)CPAL_I2C_DMA_TX_Stream[Device], &CPAL_DMA_InitStructure);
}
/* If RX Direction (Reception) selected */
if ((Direction & CPAL_DIRECTION_RX ) != 0)
{
/* Select Peripheral to Memory transfer direction */
CPAL_DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
/* Initialize I2Cx DMA Rx Stream */
DMA_Init((DMA_Stream_TypeDef*)CPAL_I2C_DMA_RX_Stream[Device], &CPAL_DMA_InitStructure);
}
}
/**
* @brief Enable the DMA clock and initialize needed DMA Channels
* used by the I2C device.
* @param Device : I2C Device instance.
* @param Direction : Transfer direction.
* @param Options : Transfer Options.
* @retval None.
*/
void CPAL_I2C_HAL_DMAInit(CPAL_DevTypeDef Device, CPAL_DirectionTypeDef Direction, uint32_t Options)
{
/* Enable I2Cx DMA */
__DMA_CLK_CMD(CPAL_I2C_DMA_CLK[Device], ENABLE);
/* I2Cx Common Channel Configuration */
CPAL_DMA_InitStructure.DMA_BufferSize = 0xFFFF;
CPAL_DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
CPAL_DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
CPAL_DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte ;
CPAL_DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
CPAL_DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
CPAL_DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
CPAL_DMA_InitStructure.DMA_MemoryBaseAddr = 0;
CPAL_DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
/* If TX Direction (Transmission) selected */
if ((Direction & CPAL_DIRECTION_TX) != 0)
{
/* Select I2Cx TXDR Address register as DMA PeripheralBaseAddress */
CPAL_DMA_InitStructure.DMA_PeripheralBaseAddr = CPAL_I2C_TXDR [Device];
/* Select Memory to Peripheral transfer direction */
CPAL_DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
/* Initialize I2Cx DMA Tx Channel */
DMA_Init((DMA_Channel_TypeDef*)CPAL_I2C_DMA_TX_Channel[Device], &CPAL_DMA_InitStructure);
}
/* If RX Direction (Reception) selected */
if ((Direction & CPAL_DIRECTION_RX ) != 0)
{
/* Select I2Cx RXDR Address register as DMA PeripheralBaseAddress */
CPAL_DMA_InitStructure.DMA_PeripheralBaseAddr = CPAL_I2C_RXDR [Device];
/* Select Peripheral to Memory transfer direction */
CPAL_DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
/* Initialize I2Cx DMA Rx Channel */
DMA_Init((DMA_Channel_TypeDef*)CPAL_I2C_DMA_RX_Channel[Device], &CPAL_DMA_InitStructure);
}
}