retarget.c

来自「stm32初级例程」· C语言 代码 · 共 83 行

/*----------------------------------------------------------------------------
 * 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
}