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Zephyr project on STM32

   Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
  • Install host dependencies.
  • Import toolchain and SDK.
  • Create, configure, build and manage apps.
  • Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench

System Workbench for STM32

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You are viewing a reply to printf through uart  

printf through uart

Posted by rreignier on 2016-08-27 16:22

Hello,

Thank you for the usefull infos.
By copying the syscalls.c file into my project and adding the flollowing function at the end of my main.c, I managed to get some output on a serial monitor by calling print(). 

int __io_putchar(int ch) {
  HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF);
  return ch;
}


But in a project converted to C++, doing the exact same modifications does not work. The function _ _ io_putchar() is never called.

Does anyone know what could cause that?

Thanks.

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