UARTs: select pins choosen by manufacturer#41

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p3p merged 4 commits intop3p:masterfrom ruedli:Uart_pin_modes

Sep 7, 2020

+124-47

Commits on Sep 6, 2020

RR 17/08/2020

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Instead of using pin numbers of 100 pins quad flat package for the #define's, I now use the port and the bit number of the TX UART pin for the name of the #define. The logic is not changed. In this…

ruedli
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Updated the README, to reflect the choices of the defines.

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Commits on Sep 7, 2020

cleanup
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