printf through uart
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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