sensor.c.svn-base

AVR单片机下

/*                ****ROBOCON 2009 | BUPT TEAM*******
 * ------------------------------------------------------------------------
 * FileName   : sensor.c
 * Version    : 1.0
 * Brief      :
 * Code by    : Leaf
 * Date       : Tue Mar 31 00:05:13 2009
 * Note       :
 *
 *
 * ------------------------------------------------------------------------
 */



#include "lib_bupt.h"
#ifdef   SENSOR_H_INCLUDED

static UINT8 judgeTimes = 4;
void setJudgeTimes( UINT8 t)
{
	judgeTimes = t;
}
/*
 * 1ms采样一次，采样若干次，若这几次都为所需，则判断成功, 之所以时间控制器要用传入参数，是为了维持可重入性
 */

/*所需的是低电平*/
Bool judgeSensorLow(volatile UINT8 *p, UINT8 b, pTimerControlBlock tmr){
	UINT8 i;
	Bool res = True;
	for(i = 0; i < judgeTimes; ++i){
		if(bit_is_set(*p, b)){
			res = False;
			break;
		}
		AvrXDelay(tmr, 1);
	}
	return res;
}

/*所需的是高电平*/
Bool judgeSensorHigh(volatile UINT8 *p, UINT8 b, pTimerControlBlock tmr){
	UINT8 i;
	Bool res = True;
	for(i = 0; i < judgeTimes; ++i){
		if(bit_is_clear(*p, b)){
			res = False;
			break;
		}
		AvrXDelay(tmr, 1);
	}
	return res;
}
#endif