tim2_ar.c

8051试验程序 基础教材

//====================================================================
//
// Author        : ADI - Apps
//
// Date          : November 2001
//
// File          : Tim2_AR.c
//
// Hardware      : ADuC834
//
// Description   : Flashes light every 256*128 machine cycles (@ 4Hz
//                 for core freq = 1.573MHz) using timer 2 in Auto
//                 Reload Mode.
//____________________________________________________________________

#include <stdio.h>
#include <ioADuC834.h>

#define adcled P3_bit.P33
#define LED P3_bit.P34		//P3.4 drives red LED on eval board


#pragma vector = extern0
__interrupt void interrupt_0 ()
{
        LED ^= 1;
        T2CON_bit.TF2 = 0;
}


void main (void)
{
    IE_bit.ET2 = 1;
   	TL2 = 0x00;
	TH2 = 0x80;
	RACAP2L = 0x00;
    RACAP2H = 0x80;

    IE_bit.EA = 1;
	T2CON = 0x04;

	while(1);
}