linesctr.c.svn-base

AVR单片机下

/*                ****ROBOCON 2009 | BUPT TEAM*******
 * ------------------------------------------------------------------------
 * FileName   : linesctr.c
 * Version    : 1.0
 * Brief      : 数线器，使用EI4，需要AVRX环境
 * Code by    : Leaf
 * Date       : Tue Mar 31 00:04:57 2009
 * Note       :
 *
 *
 * ------------------------------------------------------------------------
 */



#include "lib_bupt.h"
#ifdef LINESCTR_H_INCLUDED

volatile UINT8 linesCtr;
Mutex          linesCtrInc;
/*数线器初始化*/
void  linesCtrInit(void){
	AvrXResetSemaphore(&linesCtrInc);
	SBI(DDRE,  PE4);
	SBI(PORTE, PE4);
	linesCtrStop();
	setLinesCtr(0);
}

/*停止数线器*/
void linesCtrStop(void){
	CBI(EIMSK, INT4);
}

/*重开数线器*/
void linesCtrStart(void){
	CBI(EIMSK, INT4);
	SBI(EICRB, ISC40);
	SBI(EICRB, ISC41);
	SBI(EIMSK, INT4);
}

/*获得当前经过了几条线*/
UINT8 getLinesCtr(void){
	return linesCtr;
}

/*设置数线器值*/
void  setLinesCtr(UINT8 val){
	linesCtr = val;
}

/*数线器中断*/
AVRX_SIGINT(SIG_INTERRUPT4)
{
	IntProlog();
	++linesCtr;
	linesCtrStop();
	AvrXIntSetSemaphore(&linesCtrInc);
	Epilog();
}

#endif