Posted on April 06, 2017 at 16:15Hello! I use dma on spi3 rx & tx (STM32F302K8U6). When I call HAL_SPI_Transmit_DMA before HAL_SPI_Receive_DMA data from slave came damaged. Pseudocode:
void WriteFifo( uint8_t * buf, uint16_t size )
{
TxCmpltFlag = 0;
__START_SPI_TRANSACTION; // Software NSS
HAL_SPI_Transmit_DMA( &hspi3, buf, size );
}
void HAL_SPI_TxCpltCallback(SPI_HandleTypeDef *hspi)
{
__STOP_SPI_TRANSACTION; // Software NSS
TxCpmltFlag = 1;
}
void ReadFifo( uint8_t * buf, uint16_t size )
{
R
xCmpltFlag = 0;
__START_SPI_TRANSACTION; // Software NSS
HAL_SPI_Receive_DMA( &hspi3, buf, size );
}
void HAL_SPI_RxCpltCallback(SPI_HandleTypeDef *hspi)
{
__STOP_SPI_TRANSACTION; // Software NSS
Pseudocode
}
void Proc( void )
{
if( NeedTx&RxCmpltFlag&TxCmpltFlag )
WriteFifo( Tbuf, size);
if( NeedRx&RxCmpltFlag&TxCmpltFlag) ReadFifo( Rbuf, size);
}
I found it when start to use FW 1.7.0 for STM32F3 in Cube MX 4.20.0. This fixed by add following code in
line 3608 of stm32f3xx_hal_spi.c
if(SPI_WaitFifoStateUntilTimeout(hspi, SPI_FLAG_FRLVL, SPI_FRLVL_EMPTY, Timeout, Tickstart) != HAL_OK)
{
SET_BIT(hspi->ErrorCode, HAL_SPI_ERROR_FLAG);
return HAL_TIMEOUT;
}
I did't have this problem on
FW 1.3.0 for STM32F3. Maybe there's a bug in FW 1.7.0? or how to use HAL Drivers correct?.
#bug #stm32f3 #dma #spi
