Retargeting getchar() function
Thank you very much for the answer and the suggested code!
It’s well witten.
I was wondering if there is a “simpler” way to retarget the getchar() function.
Infact, I’ve already retargeted the putchar() function, redefining it in this way:
> int __io_putchar(int ch) {
> HAL_UART_Transmit (&huart3, (uint8_t *)&ch, 1, 0xFFFF);
> return ch;
> }
But when trying with the getchar() function, the following code doesn’t work:
> int __io_getchar(void) {
> int ch;
> HAL_UART_Receive (&huart3, (uint8_t *)&ch, 1, 0xFFFF);
> return ch;
> }
Any suggestion?
PS: How do you higlight the code in the post, using the gray square? 
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