Support for STM32H7xx family CPUs

[digitalentity]

I'd like to use tinygo for a real-world use-case, but the board I need to support is built around the STM32H743 CPU, which, unfortunately, doesn't have TinyGo support.

Is it planned in the near future? How can I contribute to make it happen?

[digitalentity]

Looks like some STM32H7 support can be derived from the #1909

[digitalentity]

I'll have a crack at this one - I should have a NUCLEO-H753ZI board collecting dust somewhere, might as well put it to a good use and bring support for STM32H7xx to TinyGo.

[jwetzell]

I've got a STM32H750 but not sure how much will crossover.

[digitalentity]

I've got a STM32H750 but not sure how much will crossover.

Should be effectively the same CPU, with a different FLASH/RAM size. Will probably require a different build tag for the CPU itself, but otherwise should be supported as well.

[jwetzell]

Nice, I looked into a bit but would definitely be down to assist in getting a working target!

[digitalentity]

I have initial (untested) draft PR - #5376. Would greatly appreciate initial review and feedback.

[digitalentity]

The scheduler boots (according to the GDB). LED doesn't blink, so it's either GPIO or I got the system tick timer wrong.