Posted on March 27, 2015 at 22:03I have an STM32F427 using the 1.4 version of the STMCube software with the HAL drivers.
I am using the stock 1.4 and calling HAL_SD_ReadBlocks_DMA to transfer 1 block from the SD card. Periodically, it hangs in the following function waiting for the SD transfer to complete:
static void SD_DMA_RxCplt(DMA_HandleTypeDef *hdma)
{
SD_HandleTypeDef *hsd = (SD_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
/* DMA transfer is complete */
hsd->DmaTransferCplt = 1;
/* Wait until SD transfer is complete */
while(hsd->SdTransferCplt == 0) <----- hangs forever
{
}
...
It happens one time out of maybe 1000 times when transferring one block. When transferring more than one block in the ReadBlocks_DMA... call, it hangs one time out of 50.
It looks like the DMA and SD command are setup correctly, but the SD complete status is never set in the HAL_SD_IRQHandler. When it hangs like this, it appears that the SD IRQ Handler is never called with the SDIO_IT_DATAEND flag.
I am using DMA for ethernet as well, but that is on a different DMA channel.
I have the SD and DMA interrupt priorities set the same as the v1.4 code.
Any thoughts?
Thanks...Keith
#sdio #stm32 #fatfs
