Posted on September 26, 2014 at 00:26Hi,
I have a problem with a SPI data transfer with DMA. I use a STM32L051 as SPI slave and created the code with STM32CubeMX.
I used the sample code as a reference and do something like this:
if (HAL_SPI_TransmitReceive_DMA(&hspi1, &txb, &rxb, 5) != HAL_OK)
{
/* Transfer error in transmission process */
}
while (HAL_SPI_GetState(&hspi1) != HAL_SPI_STATE_READY)
{
HAL_Delay(1);
}
The transfer never completes (HAL_SPI_GetState always returns busy). The bytes are transmitted to the SPI master but the last byte is wrong (duplicated from the byte before).
Before that I transfer a single byte (with the blocking function not with DMA) and that works. I also tried to use the blocking HAL function instead of the DMA version for transmitting the 5 bytes above but it also will not terminate.
I've spent hours on that, any ideas anyone?
Danny
