Need to manually take newer commits from LeafLabs/libmaple into this repo about arduino_stm32 HOT 3 CLOSED

I don't think that there are too much fixes left, maybe this one:
USART hangs on read overrun #107: leaflabs/libmaple#107 from ctz.

and maybe this can be useful for DAC boards:
leaflabs/libmaple@cb53e68

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Hi Matthias

I tried manually applying all the fixes into a branch of the repo,

https://github.com/rogerclarkmelbourne/Arduino_STM32/tree/apply-libmaple-updates

but somehow it completely wrecked it and it didnt work any more ;-(

I think the problem is possibly the replacement of the "__always_inline" with "inline" which happened in about 20 places, with the purpose of getting rid of the compiler warnings

I think what I'll need to do is to go back to the first checkin of that branch and test build each of the commits one by one, rather than what I actually did, which was to do all the changes one by one, but only rebuilding to test at the end.

I think the change in #107 is likely to be low risk and didn't cause the problems that I have with that branch

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I have manually applied the fixes to usart_private.h and dma_private and committed

See

912098d

I also put one other small change into this commit, to prevent the compiler from warning about unused args in USBSerial:begin()

I will implement the fixes for __always_inline, in a separate commit, as there is a separate issue for this

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