retarget.c

STM32F103 串口中断方式例子程序

/*----------------------------------------------------------------------------
 * Name:    Retarget.c
 * Purpose: 'Retarget' layer for target-dependent low level functions
 * Version: V1.0
 *----------------------------------------------------------------------------
 * This file is part of the uVision/ARM development tools.
 * This software may only be used under the terms of a valid, current,
 * end user licence from KEIL for a compatible version of KEIL software
 * development tools. Nothing else gives you the right to use this software.
 *
 * Copyright (c) 2005-2007 Keil Software. All rights reserved.
 *----------------------------------------------------------------------------*/

#include <stdio.h>
#include <rt_misc.h>

#pragma import(__use_no_semihosting_swi)


/*----------------------------------------------------------------------------
  external functions
 *----------------------------------------------------------------------------*/
extern int  SendChar(int ch);
extern int  GetKey(void);


struct __FILE {
  int handle;                 // Add whatever you need here 
};
FILE __stdout;
FILE __stdin;


/*----------------------------------------------------------------------------
  fputc
 *----------------------------------------------------------------------------*/
int fputc(int ch, FILE *f) {
  return (SendChar(ch));
}

/*----------------------------------------------------------------------------
  fgetc
 *----------------------------------------------------------------------------*/
int fgetc(FILE *f) {
  int ch;

  do {
    ch = GetKey ();
  }
  while (ch == -1);
  SendChar(ch);
  return (ch);
}

/*----------------------------------------------------------------------------
  _ttywrch
 *----------------------------------------------------------------------------*/
void _ttywrch(int ch) {
 SendChar (ch);
}

/*----------------------------------------------------------------------------
  ferror
 *----------------------------------------------------------------------------*/
int ferror(FILE *f) {
                              // Your implementation of ferror
  return EOF;
}

/*----------------------------------------------------------------------------
  _sys_exit
 *----------------------------------------------------------------------------*/
void _sys_exit(int return_code) {
label:  goto label;           // endless loop
}