8000 STM32F103 PB4 not accessible / remapping not part of modm · Issue #966 · modm-io/modm · GitHub
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STM32F103 PB4 not accessible / remapping not part of modm #966
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@strongly-typed

Hi there,

ST decided to use PB4 as D5 on their F103RB nucleo.

Unfortunately, PB4 is by default mapped as NJTRST, see Table 37 of RM0008.

I have not found a way to remap PB4 to GPIO by modm.

In an example with Blue Pill there is a hint in the code to access AFIO->MAPR directly, which works.

What should we do about it? Add new API to modm?

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