timer3.c

采用四端法测试欧姆电阻

#ifndef _TIMER3_C_
#define _TIMER3_C_

#include "c8051f000.h"
#include "timer3.h"
#include "system.h"
#include "typedef.h"
#include "rtos.h"


//-----------------------------------------------------------------------------
// Timer3_Init
//-----------------------------------------------------------------------------
//
// Configure Timer3 to auto-reload at interval specified by <counts> (no 
// interrupt generated) using SYSCLK as its time base.
//
void fTimer3_Init (void)
{
// set up Timer3 for auto-reload to generate interrupts at 100ms intervals
	TMR3CN = 0x00;									// stop Timer3
	TMR3RLH = ((-TC_10ms >> 8) & 0xff);	// init Timer3 reload value
	TMR3RLL = (-TC_10ms & 0xff);
	TMR3H = 0xff;									// init Timer3 to reload immediately
	TMR3L = 0xff;	
	EIE2 = 0x01;									// enable Timer3 OVR interrupt
	TMR3CN = 0x04;									// start Timer3
}

//------------------------------------------------------------------------------------
// Interrupt Service Routines
//------------------------------------------------------------------------------------

//------------------------------------------------------------------------------------
// Timer3_ISR
//------------------------------------------------------------------------------------
// This routine  work as time stick every 10 ms 
//

void fTimer3_ISR (void) interrupt 14
{
	TMR3CN &= ~(0x80);							    // clear timer3 interrupt flag，must clear by softeare
	vGlobalFlag |= bHavePassed2ms;
	fRTOS_OperateMission();	
}	
   

#endif