#include "config.h"

//#define IN_CHIP  	//如果下载到FLASH，存储器重映射
//#define IN_RAM 		//如果下载到RAM
void Fiq_exp(void)
{
}


void TargetInit(void)
{
#ifdef  IN_RAM
    MEMMAP=0x02;
#endif

#ifdef IN_CHIP
    MEMMAP=0x01;
#endif

    /***************************************/
    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;

    MAMCR=0;
#if Fcclk<20000000
    MAMTIM=1;
#else
#if Fcclk<40000000
    MAMTIM=2;
#else
    MAMTIM=3;
#endif
#endif

    MAMCR=2;

    VICIntEnClr=0xffffffff;
    VICVectAddr=0;
    VICIntSelect=0;
}



#include "rt_sys.h"
#include "stdio.h"

#pragma import(__use_no_semihosting_swi)

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

int fputc(int ch,FILE *f)
{
    ch = ch;
    f = f;
    return 0;
}

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