target.c

LPC2294 ARM7 UART 测试程序

/******************************************************************************************************
** 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
**
** Descriptions:			interrupt exceptional handler , change it as needed
**
** input parameters:		无
** Returned value:			无
**         
** Used global variables:	无
** Calling modules:			无
********************************************************************************************************/
        void __irq IRQ_Exception(void)
{
    while(1);                   //  change it to your code 这一句替换为自己的代码
}

/*********************************************************************************************************
** Function name:			FIQ_Exception
**
** Descriptions:			Fast interrupt exceptional handler , change it as needed
**
** input parameters:		无
** Returned value:			无
**         
** Used global variables:	无
** Calling modules:			无
**
********************************************************************************************************/
        void FIQ_Exception(void)
{
    while(1);                   // change it to your code  这一句替换为自己的代码
}

/*********************************************************************************************************
** Function name:			TargetInit
**
** Descriptions:			Initialize the target board; it is called in a necessary place, change it as 
**							needed
**
** input parameters:		无
** Returned value:			无
**         
** Used global variables:	无
** Calling modules:			无
**
********************************************************************************************************/
       void TargetInit(void)
{
    /* 添加自己的代码 */
    /* Add your codes here */
}

/*********************************************************************************************************
** Function name:			TargetResetInit
**
** Descriptions:			Initialize the target board before running the main() function; User may
**							change it as needed, but may not deleted it.
**
** input parameters:		无
** Returned value:			无
**         
** Used global variables:	无
** Calling modules:			无
********************************************************************************************************/
        void TargetResetInit(void)
{
#ifdef __DEBUG    
    MEMMAP = 0x3;                   //remap，对0X00000008读数/取指就是从片外0x80000000单元进行操作
#endif

#ifdef __OUT_CHIP    
    MEMMAP = 0x3;                   //remap, 对0X00000008读数/取指就是从片外0x80000000单元进行操作
#endif

#ifdef __IN_CHIP    
    MEMMAP = 0x1;                   //remap, 对0X00000008读数/取指就是从片外0x00000000单元进行操作
#endif

/* 设置系统各部分时钟 */
/* Set system timers for each component,其中cclk=M*Fosc,cclk=Fcco/(2*P),M、P分别是PLLCFG的低5位，高2位*/
    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;  /*必须将正确的馈送序列写入PLLFEED,才能使PLLCON 和 PLLCFG更改生效*/
    PLLFEED = 0x55;
    while((PLLSTAT & (1 << 10)) == 0);  /*判断PLLSTAT的PLOCK位是否为0，是，则表明PLL为锁定，否，则表明PLL锁定到指定频率*/
    PLLCON = 3;
    PLLFEED = 0xaa;
    PLLFEED = 0x55;
    
    /* 设置存储器加速模块 */
    /* Set memory accelerater module，由于LPC2210没有片内FLASH，MAM设置无效*/
    MAMCR = 0;
#if Fcclk < 20000000
    MAMTIM = 1;          /*当改变MAM定时值时，必须先通过向MAMCR写入0关闭MAM，然后将新值写入MAMTIM。最后将需要的操作模式
                           的对应值(1或2)写入MAMCR，再次打开MAM。*/
                           
#else
#if Fcclk < 40000000
    MAMTIM = 2;
#else
    MAMTIM = 3;
#endif
#endif
    MAMCR = 2;
    
    /* 初始化VIC */
    /* initialize VIC*/
    VICIntEnClr = 0xffffffff;  /*写1清零VICIntEnable中断使能寄存器中的对应位并禁止对应的中断请求*/
    VICVectAddr = 0;         /*写0将清零内部中断优先级硬件当中对应的标志*/
    VICIntSelect = 0;        /*写0，对应的中断请求分配为IRQ*/

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

}

/*********************************************************************************************************
**                  以下为一些与系统相关的库函数的实现
**                  具体作用请参考ads的编译器与库函数手册
**                  用户可以根据自己的要求修改        
********************************************************************************************************/
/*********************************************************************************************************
**                  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
********************************************************************************************************/