📄 target.c
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/****************************************Copyright (c)**************************************************
** ZhaiHai Creawor Development Co.,LTD.
** http://www.creawor.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name: target.c
** Last modified Date: 2004-11-01
** Last Version: 1.0
** 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: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
**
** Created by: Xuzhiping
** Created Date: 2004/11/02
**------------------------------------------------------------------------------------------------------*/
void __irq IRQ_Exception(void)
{
while(1); // change it to your code 这一句替换为自己的的中断服务代码
}
/*********************************************************************************************************
** Function name: FIQ_Exception
**
** Descriptions: Fast interrupt exceptional handler , change it as needed
**
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
**
** Created by: Xuzhiping
** Created Date: 2004/11/02
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------*/
/********************************************************************************************************/
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: 初始化目标板在内部是一个必须放置的命令，如需要可以改变它
** Initialize the target board; it is called in a necessary place, change it as needed
**
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
**
** Created by: xuzhiping
** Created Date: 2004/11/02
**--------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------
***************************************************************************************************/
void TargetInit(void)
{
/* 添加自己的代码 */
/* Add your codes here */
}
/***************************************************************************************************
** Function name: TargetResetInit
**
** Descriptions: 在运行main()函数之前初始化目标板; 如需要用户可以修改代码，当不能删除
** Initialize the target board before running the main() function; User
** may change it as needed, but may not deleted it.
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
** Created by: xuzhiping
** Created Date: 2004/11/02
**/
/*===================================================================================*/
/* 存储器映射控制 */
/*===================================================================================*/
void TargetResetInit(void)
{
PCON = 0X0; // 关闭空闲模式和掉电模式
PCONP = 0X800; // 关闭所有外设，只打开外部存储器接口(EMC)
#ifdef __DEBUG
MEMMAP = 0x3; //remap 如是调试状态，用户外部存储器模式，
//BCFG0 = 0X010000400; //16位配置存储器0速度最快，0X20000400 32位配置速度最快
#endif //中断向量从外部存储器重新映射
#ifdef __OUT_CHIP
MEMMAP = 0x3; //remap 如从片外运行，用户外部存储器模式，
#endif //中断向量从外部存储器重新映射
#ifdef __IN_CHIP
MEMMAP = 0x1; //remap 如从片内运行程序，用户Flash模式，
#endif //中断向量不重新映射
/*==============================================================================================*/
/* Set system timers for each component 设置系统各部分时钟 */
/*==============================================================================================*/
PLLCON = 1; //PLL允许激活 PLLCON寄存器的第一位
#if (Fpclk / (Fcclk / 4)) == 1 //VPB总线时钟位处理器时钟的1/4
VPBDIV = 0; //Fpclk = Fosc * 4 / 4
#endif
#if (Fpclk / (Fcclk / 5)) == 1 //VPB总线时钟位处理器时钟的1/4
VPBDIV = 0; //Fpclk = Fosc * 5 / 5
#endif
#if (Fpclk / (Fcclk / 4)) == 2 //VPB总线时钟位处理器时钟的1/2
VPBDIV = 2;
#endif
#if (Fpclk / (Fcclk / 5)) == 2 //VPB总线时钟位处理器时钟的1/2
VPBDIV = 2;
#endif
#if (Fpclk / (Fcclk / 4)) == 4 //VPB总线时钟位处理器时钟相同
VPBDIV = 1;
#endif
#if (Fpclk / (Fcclk / 5)) == 4 //VPB总线时钟位处理器时钟相同
VPBDIV = 1;
#endif
/*=============================================================================================*/
/* 设置PLLCFG寄存器的M、P值 */
/*=============================================================================================*/
#if (Fcco / Fcclk) == 2
PLLCFG = ((Fcclk / Fosc) - 1) | (0 << 5);
#endif
#if (Fcco / Fcclk) == 4
PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5); //M=(Fcclk / Fosc) - 1) P=2 << 5 Fcclk=44
#endif
#if (Fcco / Fcclk) == 4 // Fcco = Fcclk * 2 * p , Fcclk = Fosc * 5
PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5); //M=(Fcclk / Fosc) - 1) P=2 << 5 Fcclk=55.296
#endif
#if (Fcco / Fcclk) == 8
PLLCFG = ((Fcclk / Fosc) - 1) | (2 << 5); //M=(Fcclk / Fosc) - 1) P=4 << 5 Fcclk=33.1776
#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;
/*====================================================================================*/
/* Set memory accelerater module 设置存储器加速模块 */
/*====================================================================================*/
MAMCR = 0; //存储器加速器模块控制寄存器，设置为禁止
#if Fcclk < 20000000
MAMTIM = 1; //存储器加速器定时控制寄存器，取指周期为1个CPU时钟（cclk）
#else
#if Fcclk < 40000000
MAMTIM = 2; //取指周期为2个CPU时钟（cclk）
#else
MAMTIM = 3; //取指周期为3个CPU时钟（cclk）
#endif
#endif
MAMCR = 2; //存储器加速器模块控制寄存器，设置为MAM功能完全允许
/*====================================================================================*/
/* initialize VIC 初始化VIC */
/*====================================================================================*/
VICIntEnClr = 0xffffffff;
VICVectAddr = 0;
VICIntSelect = 0;
/* 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)
#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
********************************************************************************************************/
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