STM32H5xx SPI DMA

[NagaHimanshu]

Hi, I am working on SPI DMA transfers on STM32H563ZI. I was able to transfer data over SPI using DMA and I observed that it is a blocking transfer and core waits till transfer is complete. The polling sequence are as follows:

zephyr/drivers/spi/spi_ll_stm32.c

Line 1061 in ca4ff1e

spi_stm32_complete(dev, ret);

zephyr/drivers/spi/spi_ll_stm32.h

Line 223 in ca4ff1e

while (LL_SPI_IsActiveMasterTransfer(spi)) {

Is there any support for non-blocking SPI DMA transfer?

[ajarmouni-st]

Hi @NagaHimanshu, for now non-blocking DMA transfers are not supported, but I'm working on it, hopefully will submit a PR next week.

[NagaHimanshu]

Hi @ajarmouni-st, any update on this?

[ajarmouni-st]

Hi @NagaHimanshu, yes I have been working on it since last week, here is what I have for now https://github.com/ajarmouni-st/zephyr_dev/tree/dev_stm32_spi_async, not yet ready to be submitted since the second buffer in async call test is not received correctly, only half of it (18 bytes) is. Tested on nucleo_h753zi, nucelo_f767zi & nucleo_f429zi.
To reproduce the result west build -p always -b nucleo_h753zi tests/drivers/spi/spi_loopback -T drivers.spi.stm32_spi_async_dma.loopback

[NagaHimanshu]

@ajarmouni-st Thanks for the reply. I will try to reproduce the result from the branch. I hope it will be resolved at the earliest.

[ajarmouni-st]

Hi @NagaHimanshu, the loopback test now passes with no errors on nucleo_f767zi & nucleo_f429zi.

[NagaHimanshu]

Thanks for the update @ajarmouni-st.