Import STM32CubeH7 v1.9.1 on 03-Jan-2022.

[mocleiri]

I tried to enable I2S on my Nucleo H743ZI2 but it failed due to missing HAL functions.

mocleiri/tensorflow-micropython-examples#54

I was able to run the fetch_from_upstream.sh script to update to the files contained here and the build worked properly with I2S enabled.

[mocleiri]

I think I moved to fast on filing this pull request.

I did a clean build and got the HAL errors again which shouldn't happen if the STM32H7 update had fixed my issue.

Upon deeper inspection I can see that there are some HAL API differences between the STM32F4xx HAL files used in machine-i2s.c for stm32 and the HAL API provided by the STM32H7xx HAL files.

[dpgeorge]

The H7 HAL could do with updating, but it seems that's a separate issue to getting I2S working. So I'll hold off on this.

[mocleiri]

I've confirmed that there are just differences between the STM32F4 and STM32H7 HAL's as they relate to i2s and this proposed update doesn't effect that in any way.

I should be able to can get machine.I2S working for STM32H7 using the existing HAL without needing this update.

I'm going to close this request. I don't expect to be able to look at the issue for a few months so will reopen or refile if it is needed for I2S support on STM32H7.