/******************************************************************************************************
** File name:			target.c
** Descriptions:		header file of the specific codes for LPC2200 target boards
**				Every project should include a copy of this file, user may modify it as needed
********************************************************************************************************/

#define IN_TARGET
#include "config.h"

/*********************************************************************************************************
** Function name:			IRQ_Exception
********************************************************************************************************/
        void __irq IRQ_Exception(void)
{
    while(1);                   //  change it to your code 這一句替換為自己的代碼
}

/*********************************************************************************************************
** Function name:			FIQ_Exception
********************************************************************************************************/
        void FIQ_Exception(void)
{
    while(1);                   // change it to your code  這一句替換為自己的代碼
}

/*********************************************************************************************************
** Function name:			TargetInit
********************************************************************************************************/
       void TargetInit(void)
{
    /* 添加自己的代碼 */
    /* Add your codes here */
}

/*********************************************************************************************************
** Function name:			TargetResetInit
**
** Descriptions:			進(jìn)入之前的目標(biāo)板初始化，可以被修改，但不能被刪除
********************************************************************************************************/
        void TargetResetInit(void)
{

	/*設(shè)置存儲(chǔ)器映射方式*/
#ifdef __DEBUG                        
    MEMMAP = 0x3;                   //remap，對(duì)0X00000008讀數(shù)/取指就是從片外0x80000000單元進(jìn)行操作
#endif

#ifdef __OUT_CHIP    
    MEMMAP = 0x3;                   //remap, 對(duì)0X00000008讀數(shù)/取指就是從片外0x80000000單元進(jìn)行操作
#endif

#ifdef __IN_CHIP    
    MEMMAP = 0x1;                   //remap, 對(duì)0X00000008讀數(shù)/取指就是從片外0x00000000單元進(jìn)行操作
#endif

/* 設(shè)置系統(tǒng)各部分時(shí)鐘，由系統(tǒng)硬件決定*/
/* 設(shè)置外設(shè)時(shí)鐘（pclk）與系統(tǒng)時(shí)鐘（cclk）分頻比*/
/* Set system timers for each component,其中cclk=M*Fosc,cclk=Fcco/(2*P),M、P分別是PLLCFG的低5位，高2位*/
    PLLCON = 1;                   //設(shè)置激活但未連接PLL
#if (Fpclk / (Fcclk / 4)) == 1    //此值由系統(tǒng)硬件決定
    VPBDIV = 0;
#endif
#if (Fpclk / (Fcclk / 4)) == 2    //此值由系統(tǒng)硬件決定
    VPBDIV = 2;
#endif
#if (Fpclk / (Fcclk / 4)) == 4    //此值由系統(tǒng)硬件決定
    VPBDIV = 1;
#endif
/*設(shè)定PLL的乘因子M和除因子P的值*/
#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;  /*必須將正確的饋送序列寫入PLLFEED,才能使PLLCON 和 PLLCFG更改生效*/
    PLLFEED = 0x55;
    while((PLLSTAT & (1 << 10)) == 0);  /*判斷PLLSTAT的PLOCK位是否為0，是，則表明PLL為鎖定，否，則表明PLL鎖定到指定頻率*/
    PLLCON = 3;
    PLLFEED = 0xaa;  /*發(fā)送PLL饋送序列，執(zhí)行激活和連接動(dòng)作*/
    PLLFEED = 0x55;
    
    /* 設(shè)置存儲(chǔ)器加速模塊 */
    /* Set memory accelerater module，由于LPC2210沒有片內(nèi)FLASH，MAM設(shè)置無效*/
    MAMCR = 0;           /*禁止MAM功能*/
#if Fcclk < 20000000     /*系統(tǒng)時(shí)鐘低于20MHZ,建議設(shè)置為1 */
    MAMTIM = 1;          /*當(dāng)改變MAM定時(shí)值時(shí)，必須先通過向MAMCR寫入0關(guān)閉MAM，然后將新值寫入MAMTIM。最后將需要的操作模式
                           的對(duì)應(yīng)值(1或2)寫入MAMCR，再次打開MAM。*/
                           
#else
#if Fcclk < 40000000     /*系統(tǒng)時(shí)鐘在20~40MHZ之間，建議設(shè)置為2 */
    MAMTIM = 2;
#else                    /*系統(tǒng)時(shí)鐘高于40MHZ，建議設(shè)置為3 */
    MAMTIM = 3;
#endif
#endif

    MAMCR = 2;                 /*使能MAM*/
    
    /* 初始化VIC */
    /* initialize VIC*/
    VICIntEnClr = 0xffffffff;  /*寫1清零VICIntEnable中斷使能寄存器中的對(duì)應(yīng)位并禁止對(duì)應(yīng)的中斷請(qǐng)求*/
    VICVectAddr = 0;         /*寫0將清零內(nèi)部中斷優(yōu)先級(jí)硬件當(dāng)中對(duì)應(yīng)的標(biāo)志*/
    VICIntSelect = 0;        /*寫0，對(duì)應(yīng)的中斷請(qǐng)求分配為IRQ*/

    /* 添加自己的代碼 */
    /* Add your codes here */

}

/*********************************************************************************************************
**                  以下為一些與系統(tǒng)相關(guān)的庫函數(shù)的實(shí)現(xiàn)
**                  具體作用請(qǐng)參考ads的編譯器與庫函數(shù)手冊(cè)
**                  用戶可以根據(jù)自己的要求修改        
********************************************************************************************************/
/*********************************************************************************************************
**                  The implementations for some library functions
**                  For more details, please refer to the ADS compiler handbook and The library 
**					function manual
**                  User could change it as needed       
********************************************************************************************************/

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

#pragma import(__use_no_semihosting_swi)
#pragma import(__use_two_region_memory)

        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;
}


/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/