Stm32f429 dma data width change on the fly

prothan · ‎2015-06-29

Posted on June 29, 2015 at 09:13

Tesla DeLorean · ‎2015-06-29

Posted on June 29, 2015 at 15:02

I'd expect you'd have to stop it, and then restart it with the new settings you want.

Tips, Buy me a coffee, or three.. PayPal Venmo
Up vote any posts that you find helpful, it shows what's working..

prothan · ‎2015-06-29

Posted on June 30, 2015 at 06:56

clive1,

Thanks, looks like my msg got cut off, but that is the answer I was looking for. Does this look good as far as reconfiguring the tx stream.

Thanks

void dmareconfig(uint32_t PeriphDataAlignment,uint32_t MemDataAlignment){

__HAL_DMA_DISABLE(SpiHandle.hdmatx);

__HAL_SPI_DISABLE(&SpiHandle);

static DMA_HandleTypeDef hdma_tx = SpiHandle.hdmatx;

hdma_tx.Init.PeriphDataAlignment = PeriphDataAlignment;

hdma_tx.Init.MemDataAlignment = MemDataAlignment;

__HAL_SPI_ENABLE(&SpiHandle);

__HAL_DMA_ENABLE(SpiHandle.hdmatx);

}