SPI communication on STM32H7

[Jonathan Kim]

SPI communication on STM32H7

Working on interfacing Nucleo-H7A3 to COMX-CN-FB evaluation board which embedded netX made by Hischer using SPI interface. 

Using SPL's SPI Transmit & Receive library, I implemented and proved the SPI data transmit & receive and confirmed SCK, MISO, MOSI, and SS signal on the Nucleo-H7A3 evaluation board.

And then, I transformed the source code for the Nucleo-H7A3 evaluation board but did not get the expected results on the oscilloscope. What did I miss out on configuring SPI, and what is this phenomenon induced from?

Please refer to the screenshot of the SPI oscilloscope waveform on the Nucleo-H7A3 evaluation board and on the Nucleo-F446 evaluation board in the attachment file.

[S.Ma]

The SPI IP generation/version is different between F4 and H7. HW Fifo being one difference in the data flow.

[Jonathan Kim]

Thank you for your reply.

What are there differences between F4 and H7 for SPI IP generation?

And where can I get some reference materials for SPI implementation of H7?

[Pavel A.]

See the STM32H7 online training

https://st-onlinetraining.s3.amazonaws.com/STM32H7-Peripheral_Serial_Peripheral_interface_%28SPI%29/index.html

They don't have such slides on 'F4. May be the 'L4 slides could help.

https://st-onlinetraining.s3.amazonaws.com/STM32L4_Peripheral_SPI_interface_(SPI)/index.html

[AScha.3]

another problem could be the cache...

just try: D-cache off.