STM32H5: recent example of SPI slave with DMA for both RX/TX please

[Ping1]

Dear all

I am relatively new to STM32, using STM32H563 as an SPI slave to receive data and send some feedback data as same time, The SPI master is a Tiva MCU form Ti,  as data is relatively long, I need to use DMA, I tried to find an example for it, but there is none with DMA, could some one please provide some starting point for me? 

Thanks in advance.

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[Ping1]

Hi, thanks for reply

I understand the example is running once - a specified number of bytes only ( or a data packet). I tried to do modified it to do it continuously, i.e. master sends a data packet, slave receives and reply with something, and then wait for next data packet. however, after it receives a packet, it hangs with some errors and not be able to receive more.

Any suggestions?

Regards!

Ping 

[TDK]

If you want some help debugging the code you've modified, post the code so that it can be seen by others. "some errors" is not a helpful description if you are looking for help.

[Ping1]

Hi, RDK

Thanks for response, after calling HAL_StatusTypeDef status = HAL_SPI_TransmitReceive_DMA() first time, slave receives data from master, however, when calling it again for transmit and further receive, status returns HAL_BUSY, that means it failed to send any response back to master, right? 

Please advise.

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