@gmx that looks promising
I ran into this issue recently while trying to get the pico-examples/uart/hello_uart example.
Characters output to serial uart worked with uart_putc but not with printf, despite this code comment:
This seems to not be true with SDK 2.2.0
https://github.com/raspberrypi/pico-exa ... llo_uart.c
I ran into this issue recently while trying to get the pico-examples/uart/hello_uart example.
Characters output to serial uart worked with uart_putc but not with printf, despite this code comment:
Code:
// In a default system, printf will also output via the default UARThttps://github.com/raspberrypi/pico-exa ... llo_uart.c
Statistics: Posted by breaker — Wed Jan 21, 2026 7:00 pm