target.c

汽车仪表板开发

#define IN_TARGET
#include "config.h"

//以下，无向量IRQ中断代码
void __irq IRQ_Exception(void)
{
     //这添加自己的代码
	VICVectAddr = 0x00;			// 通知VIC中断处理结束							
}

void FIQ_Exception(void)
{
}


//以下，目标板上电初始化
void TargetResetInit(void)
{
  #ifdef __DEBUG_RAM    
    MEMMAP = 0x2;                   //remap
  #endif

  #ifdef __DEBUG_FLASH    
    MEMMAP = 0x1;                   //remap
  #endif

  #ifdef __IN_CHIP    
    MEMMAP = 0x1;                   //remap
  #endif

  //设置系统各部分时钟 
  PLLCON = 1;
  #if (Fpclk / (Fcclk / 4)) == 1
     VPBDIV = 0;
  #endif
  #if (Fpclk / (Fcclk / 4)) == 2
    VPBDIV = 2;
  #endif
  #if (Fpclk / (Fcclk / 4)) == 4
    VPBDIV = 1;
  #endif

  #if (Fcco / Fcclk) == 2
    PLLCFG = ((Fcclk / Fosc) - 1) | (0 << 5);
  #endif
  #if (Fcco / Fcclk) == 4
    PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5);
  #endif
  #if (Fcco / Fcclk) == 8
    PLLCFG = ((Fcclk / Fosc) - 1) | (2 << 5);
  #endif
  #if (Fcco / Fcclk) == 16
    PLLCFG = ((Fcclk / Fosc) - 1) | (3 << 5);
  #endif
  PLLFEED = 0xaa;
  PLLFEED = 0x55;
  while((PLLSTAT & (1 << 10)) == 0);
  PLLCON = 3;
  PLLFEED = 0xaa;
  PLLFEED = 0x55;
    
  //设置存储器加速模块
  MAMCR = 0;
  #if Fcclk < 20000000
    MAMTIM = 1;
  #else
   #if Fcclk < 40000000
    MAMTIM = 2;
    #else
     MAMTIM = 3;
    #endif
  #endif
  MAMCR = 2;
    
  // 初始化VIC 
  VICIntEnClr = 0xffffffff;
  VICDefVectAddr=(uint32)IRQ_Exception;
  VICVectAddr = 0;
  VICIntSelect = 0;

  //以下，可添加自己的代码
}

// 以下为一些与系统相关的库函数的实现
// 具体作用请ads的参考编译器与库函数手册
// 用户可以根据自己的要求修改 
      
#include <rt_sys.h>
#include <stdio.h>

//#pragma import(__use_no_semihosting_swi)



int fgetc(FILE *f)
{
    f = f;
    return 0;
}


int __rt_div0(int a)
{
    a = a;
    return 0;
}

/*
int _sys_close(FILEHANDLE fh)
{
    fh = fh;
    return 0;
}

int _sys_write(FILEHANDLE fh, const unsigned char * buf,unsigned len, int mode)
{
    fh = fh;
    buf = buf;
    len =len;
    mode = mode;
    return 0;
}

int _sys_read(FILEHANDLE fh, unsigned char * buf, unsigned len, int mode)
{
    fh = fh;
    buf = buf;
    len =len;
    mode = mode;
    return 0;
}

void _ttywrch(int ch)
{
    ch = ch;
}

int _sys_istty(FILEHANDLE fh)
{
    fh = fh;
    return 0;
}

int _sys_seek(FILEHANDLE fh, long pos)
{
    fh = fh;
    return 0;
}

int _sys_ensure(FILEHANDLE fh)
{
    fh = fh;
    return 0;
}

long _sys_flen(FILEHANDLE fh)
{
    fh = fh;
    return 0;
}

int _sys_tmpnam(char * name, int sig, unsigned maxlen)
{
    name = name;
    sig = sig;
    maxlen = maxlen;
    return 0;
}

void _sys_exit(int returncode)
{
    returncode = returncode;
}

char *_sys_command_string(char * cmd, int len)
{
    cmd = cmd;
    len = len;
    return 0;
}
*/



//=============================================================================