[riot-notifications] [RIOT-OS/RIOT] sys: make uart_stdio RX optional (attempt #2) (#11310)

Kaspar Schleiser notifications at github.com
Mon Apr 1 15:49:10 CEST 2019


> If I understand this correctly, it is currently impossible to have UART RX compiled in _and_ be able to go to low power mode, right?

Nope. On stm32, if an RX callback is configured and uart is initialized (and not powered off through uart_poweroff()), LPM is blocked such that RX still works.
The problem is that stdio_uart always initializes both RX and TX.

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