counter.c

基于LPC2136的线阵CCD采集系统的源代码

/****************************************Copyright (c)**************************************************
**                               Guangzou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name:			main.c
** Last modified Date:  2004-09-16
** Last Version:		1.0
** Descriptions:		The main() function example template
**
**------------------------------------------------------------------------------------------------------
** Created by:			Chenmingji
** Created date:		2004-09-16
** Version:				1.0
** Descriptions:		The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by: 		linwensen
** Modified date:		2007-09-25
** Version:				1.01
** Descriptions:		外部中断唤醒掉电CPU，同时产生中断。
**
********************************************************************************************************/
#include "config.h"

void counterinit (void)
{
	PINSEL1 = 1 << 2;				// P0.17连接捕获1.2
	
//	T1PR  = 99;						// 分频系数
	T1CCR = (1 << 7);				// 设置CAP1.2下降沿捕获
			
	T1CTCR = (0x01 << 0) |			// 计数器，在CAP的上升沿
		     (0x02 << 2);			// 选择CAPn.2
	T1TC  = 0;
	T1TCR = 0x01;					// 启动定时器
	
}
/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/