Hardword: STM32F0_Discovery
Develop_Kit: Keil5.30+STM32CubeMX
I define the printf function in main.c as below:
#include "stdio.h"
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar (int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch,FILE *f)
#endif
PUTCHAR_PROTOTYPE
{
HAL_UART_Transmit(&huart1,(uint8_t *)&ch,1,0xFFFF);
return ch;
}
It can be print the message when I using [printf].
Just want to getchar from the serial port, I define the getchar_prototype as below:
#ifdef __GNUC__
#define GETCHAR_PROTOTYPE int __io_getchar (void)
#else
#define GETCHAR_PROTOTYPE int fgetc(FILE *f)
#endif
GETCHAR_PROTOTYPE
{
uint8_t ch=0;
__HAL_UART_CLEAR_OREFLAG(&huart1);
HAL_UART_Receive(&huart1,(uint8_t *)&ch,1,0xFFFF);
HAL_UART_Transmit(&huart1,(uint8_t *)&ch,1,0xFFFF);
return ch;
}
Unfortunately, the printf and scanf function aren`t useful in the MCU. How can I recover this function? And how to define the scanf function in the MDK keil.
