serial_console.c

/*****************************************************************************************
 * Purpose:
 *     Providing sending / receiving the printf / scanf strings to/from a specified
 * UART interface.
 *
 *
 *****************************************************************************************
 * Author:      Usama
 * Created on:  July 28, 2022
 *****************************************************************************************
 * Changes:
 *
 * Date         Changed by      Description
 * ----         ----------      -----------
 *
 *
 *
 *
 *****************************************************************************************/

#include "stm32f7xx_hal.h"

//- IMPORTANT:
//-     Set this handle to any initialized UART
UART_HandleTypeDef *console_io_uart_ptr = 0;


int __io_putchar(int _char)
{
	if (console_io_uart_ptr)
	{
		HAL_UART_Transmit(console_io_uart_ptr, (unsigned char *) &_char, 1, HAL_MAX_DELAY);
		return _char;
	}

	return 0;
}

int __io_getchar(void)
{
	if (console_io_uart_ptr)
	{
		unsigned char _char;

		HAL_UART_Receive(console_io_uart_ptr, &_char, 1, HAL_MAX_DELAY);
		HAL_UART_Transmit(console_io_uart_ptr, &_char, 1, HAL_MAX_DELAY);

		if (_char == '\r')
		{
			unsigned char repl = '\n';
			HAL_UART_Transmit(console_io_uart_ptr, &repl, 1, HAL_MAX_DELAY);
		}

		return _char;
	}

	return 0;
}