[riot-notifications] [RIOT-OS/RIOT] cpu/saml21: can't set baud rate on SERCOM5 (#16692)

benpicco notifications at github.com
Fri Jul 30 11:12:15 CEST 2021


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#### Description

It's not possible to set the baud rate on SERCOM5 when used in UART mode.


#### Steps to reproduce the issue

 - Configure SERCOM5 as UART
 - run `tests/periph_uart` and try to communicate with the UART of a different machine
 
#### Expected results

 - the two machines can talk to each other

#### Actual results

 - baud rate of SAM L21 is always locked to ~1.5 MHz

#### Versions
RIOT master

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https://github.com/RIOT-OS/RIOT/issues/16692
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