Hi Alan, > So, even following these steps you found the issue? Yes I followed the tutorial very carefully, albeit on a slightly different STM32F4 board.
> Hmm, probably you forgot this step: > > Device Drivers ---> > [ ] Serial Driver Support ---- (disable serial driver) I followed this step, still had the issue. stm32_serial.c is compiled when CONFIG_STM32_USART=y. Maybe that the key difference with your stm32f4discovery your were using in the tutorial? CONFIG_STM32_USART=n fixes the issue... but what about applications where you use semihosting for your console because you run out of UARTs (and for which you'd like CONFIG_STM32_USART=y, CONFIG_STM32_SERIALDRIVER=y, etc.)? This is a use case I frequently have. > Could you please submit it as a PR in our github? Will do! Thanks, Jean
