debug.c

本程序为ST公司开发的源代码

/**************************************************
 *
 * <filename>
 *
 * CVS ID:   $Id: debug.c,v 1.13 2006/09/25 13:49:55 belardi Exp $
 * Author:   Leos Longauer [LL] - STM
 * Date:     $Date: 2006/09/25 13:49:55 $
 * Revision: $Revision: 1.13 $
 * 
 * Description:
 * 
 *   - TRACE32 feature: printf() to terminal window
 *
 ***************************************************
 * 
 * COPYRIGHT (C) ST Microelectronics  2005
 *            All Rights Reserved
 *
 ****************************************************
 *
 * STM CVS Log:
 *
 * $Log: debug.c,v $
 * Revision 1.13  2006/09/25 13:49:55  belardi
 * Added #pragma to force ARM compilation , due to inline _asm
 *
 * Revision 1.12  2006/09/18 09:55:21  belardi
 * Corrected CVS keyword usage
 *
 * Revision 1.11  2006/09/18 09:22:43  belardi
 * Added Log CVS keyword into file header
 *
 * Revision 1.10  2006/09/15 20:18:11  belardi
 * Added Log CVS keyword into file header
 *
 *
 ***************************************************/

#include "configuration.h"
 
#ifdef TRACE_DEBUG

// [RB] this file contains __asm instructions which cannot
// be compiled in Thumb mode
#pragma ARM

#include "debug.h"
#include <stdio.h>

struct __FILE { unsigned int handle;   /* Add whatever you need here */};

size_t __fread_bytes_avail(void *buf, size_t nbytes, FILE *stream)
/* Read a single character into buf[] using fgetc() */
{
  *(char *)buf = (char)fgetc(stream);
  return 1;
}

int putcc(int ch)
{
    int temp = ch;
    int DCCStatus;
    do 
    {
        __asm  {MRC p14,0,DCCStatus,c0,c0;}
    }while (DCCStatus & DCC_WRITEBUSY);   
    __asm  {MCR p14,0,temp,c1,c0;} 
      
    return temp;    
}

int getcc()
{
    int temp;
    int DCCStatus;
    do
    {
        __asm  {MRC p14,0,DCCStatus,c0,c0;}                  
    }while (!(DCCStatus & DCC_READFULL));
    __asm  {MRC p14,0,temp,c1,c0;}                   
    
    return temp;
}

#if (HAVE_PRINTF==0)
// [RB] doubly defined function, use the pdebug.c version with HAVE_PRINTF
int fputc(int ch, FILE *f)
{
	return putcc(ch);
}
#endif

int fgetc(FILE *f)
{
	return getcc();
}

#endif // TRACE_DEBUG