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STM32F103C8: CubeMX reports conflicts when selecting 3 UARTs plus USB

Question asked by Johannes Segmüller on Dec 17, 2017

I was setting up a project which uses 3 UARTs + USB on a F103.

CubeMX reports a conflict on UART 1 when USB is configured.

I checked the ref man and datasheet but was unable to

see from what this conflict should arise.

There are no shared pins between these IPs.


I also diffed the generated code between variants with USART1

disabled or enabled and did not see obviuos diffs which do not originated

in the fact of wether USARt1 was configured or not.


Is this a false positive on CubeMXes' side?