基于LPC2131(LPC21XX)的频率显示

/****************************************Copyright (c)************************************************** ** Guangzou ZLG-MCU Development Co.,LTD. ** graduate school ** http://www.zlgmcu.com ** **--------------File Info------------------------------------------------------------------------------- ** File name: target.c ** Last modified Date: 2004-09-17 ** 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: Chenmingji ** Modified date: 2004-09-17 ** Version: 1.01 ** Descriptions: Renewed the template, added more compiler supports ** **------------------------------------------------------------------------------------------------------ ** Modified by: ** Modified date: ** Version: ** Descriptions: ** ********************************************************************************************************/ #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: Chenmingji ** Created Date: 2004/02/02 **------------------------------------------------------------------------------------------------------- ** Modified by: ** Modified date: **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ 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: None ** Returned value: None ** ** Used global variables: None ** Calling modules: None ** ** Created by: Chenmingji ** Created Date: 2004/02/02 **------------------------------------------------------------------------------------------------------- ** 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: 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: Chenmingji ** Created Date: 2004/02/02 **------------------------------------------------------------------------------------------------------- ** Modified by: ** Modified date: **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ 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: None ** Returned value: None ** ** Used global variables: None ** Calling modules: None ** ** Created by: Chenmingji ** Created Date: 2004/02/02 **------------------------------------------------------------------------------------------------------- ** Modified by: ** Modified date: **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ void TargetResetInit(void) { #ifdef __DEBUG_RAM MEMMAP = 0x2; //remap #endif #ifdef __DEBUG_FLASH MEMMAP = 0x1; //remap #endif #ifdef __IN_CHIP MEMMAP = 0x1; //remap #endif /* 设置系统各部分时钟 */ /* Set system timers for each component */ 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 */ /* Set memory accelerater module*/ MAMCR = 0; #if Fcclk < 20000000 MAMTIM = 1; #else #if Fcclk < 40000000 MAMTIM = 2; #else MAMTIM = 3; #endif #endif MAMCR = 2; /* 初始化VIC */ /* initialize 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 ********************************************************************************************************/ /********************************************************************************************************* ** 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) 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 =