target.c

philips arm7 lpc2103的常用功能的库函数第二部分

/***********************************************Copyright (c)*********************************************
**                                Guangzou ZLG-MCU Development Co.,LTD.
**                                     
**                                       http://www.zlgmcu.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name:			    target.c
** Last modified Date:      2007-09-20
** Last Version:		    1.0
** Descriptions:		    header file of the specific codes for LPC2100 target boards
**						    Every project should include a copy of this file, user may modify it as needed
**--------------------------------------------------------------------------------------------------------
** Created by:			    Chenmingji
** Created date:		    2004-02-02
** Version:				    1.0
** Descriptions:		    The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             LiXiaoCheng
** Modified Date:           2007-09-25
** Version:                 1.1
** Descriptions:            增加了中断寄存器保护功能，用户操作VIC必须通过库函数来操作
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             LiXiaoCheng
** Modified Date:           2007-09-27
** Version:                 1.2
** Descriptions:            增加了管脚链接设置功能
**
*********************************************************************************************************/
#include "config.h"

/*********************************************************************************************************
** Function name:           FIQ_Exception
** Descriptions:            快速中断服务函数,用户设置好快中后,在该函数中添加用户代码就可.
** Input parameters:        NONE
** Output parameters:       NONE
** Returned value:          NONE
*********************************************************************************************************/
void FIQ_Exception (void)
{
    /* 添加用户代码 */
}

/*********************************************************************************************************
** Function name:           TargetResetInit
** Descriptions:            目标板初始化.
** Input parameters:        NONE
** Output parameters:       NONE
** Returned value:          NONE
*********************************************************************************************************/
void TargetResetInit (void)
{
    #ifdef __DEBUG_RAM    
        MEMMAP = 0x02;                                                  /* 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;
    VICVectAddr = 0;
    VICIntSelect = 0;
	VICProtection = 0x01;					                            /* 禁止修改中断向量寄存器       */
	
    /*  
     *  初始化P0管脚连接
     */ 
	PINSEL0  = (P0_15_FNUC <<30)|(P0_14_FNUC <<28)|(P0_13_FNUC <<26)|(P0_12_FNUC <<24)|(P0_11_FNUC <<22)| 
	           (P0_10_FNUC <<20)|(P0_09_FNUC <<18)|(P0_08_FNUC <<16)|(P0_07_FNUC <<14)|(P0_06_FNUC <<12)| 
	           (P0_05_FNUC <<10)|(P0_04_FNUC << 8)|(P0_03_FNUC << 6)|(P0_02_FNUC << 4)|(P0_01_FNUC << 2)| P0_00_FNUC;
	                                                                    /* P0.00 -- P0.15               */
	                                                                    
	PINSEL1  = (P0_31_FNUC <<30)|(P0_30_FNUC <<28)|(P0_29_FNUC <<26)|(P0_28_FNUC <<24)|(P0_27_FNUC <<22)| 
	           (P0_26_FNUC <<20)|(P0_25_FNUC <<18)|(P0_24_FNUC <<16)|(P0_23_FNUC <<14)|(P0_22_FNUC <<12)| 
	           (P0_21_FNUC <<10)|(P0_20_FNUC << 8)|(P0_19_FNUC << 6)|(P0_18_FNUC << 4)|(P0_17_FNUC << 2)| P0_16_FNUC;
                                                                        /* P0.16 -- P0.31               */
    /* 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        
*********************************************************************************************************/
/* #ifdef __TTY_SEMI */

#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;
}

/*********************************************************************************************************
   END FILE
*********************************************************************************************************/