Car/Core/Inc/syscalls.h

#ifndef __SYSCALLS_H
#define __SYSCALLS_H

#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "usart.h"

#define HUART1 (&huart1)
#define HUART2 (&huart2)

// 条件编译，适配不同平台 (GNU, GCC)
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#define GETCHAR_PROTOTYPE int __io_getchar(void)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#define GETCHAR_PROTOTYPE int fgetc(FILE *f)
#endif /* __GNUC__ */

int _read(int file, char *ptr, int len);
int _write(int file, char *ptr, int len);

PUTCHAR_PROTOTYPE;
GETCHAR_PROTOTYPE;

void delay_us(uint16_t us);
void my_printf(UART_HandleTypeDef *huart, const char *buf, ...);

#endif