我用ＡＴ８９Ｃ２０５１的外部中断０做键中断，也就是在Ｐ３.２上拉了１Ｋ电阻，下接一按键，怎么按，都不会有中断，程序如下，用过ＡＴ８９Ｃ２０５１的大虾门帮忙看看！
//compiler is keil c51 6.23c UP
/**** this is n. v2 version in 22;56 5/14 *****/
#include <AT89C2051.H>
//#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
/***************************************
*PIN defines
*
****************************************/
sbit OPCLS = P1^7;
sbit START = P3^0;
/********when ms is 200 ,time is 500ms**************/
void clk_int(void) interrupt 0
{ uchar i=0;
//EA=0;
/*if(OPCLS==0)
{OPCLS=1;
i=1;
}
*/
while(START); //暂停动作
/*if(i==1)
{OPCLS=0;}
*/
EA=1;
}
void delay(uchar ms)
{
uchar t;
do {
for(t=0;t!=255;t++);
for(t=0;t<60;t++);
}
while(ms--);
}
void InitSystem(void)
{
P1=0xff;
//P0=0xff;
//P2=0xff;
//P3=0xff;
EX0=1; //打开中断0
IT0=0; //电平触发
//EA=0; //关闭中断
}
void Point5s(uint ss) //5s点击子程序
{ uchar i;
while(ss)
{ for(i=0;i<10;i++)
{ OPCLS=0;
delay(500);
OPCLS=1;
delay(500);
}
ss--;
}
}
void Light5s(uint ss) //5s长明子程序
{ uchar i;
while(ss)
{ for(i=0;i<20;i++)
{ OPCLS=0;
delay(500);
}
ss--;
}
OPCLS=1;
}
void main(void)
{InitSystem();
EA=1;
while(1)
{
while (START==0)
{ Point5s(60); //点击360*5S=30M
Light5s(60); //点击360*5S=30M
}
}
}
头文件如下：
/*--------------------------------------------------------------------------
AT892051.H
Header file for the Atmel AT89C2051.
Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.
All rights reserved.
--------------------------------------------------------------------------*/
#ifndef __AT892051_H__
#define __AT892051_H__
/*------------------------------------------------
Byte Registers
------------------------------------------------*/
sfr SP = 0x81;
sfr DPL = 0x82;
sfr DPH = 0x83;
sfr PCON = 0x87;
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr TL0 = 0x8A;
sfr TL1 = 0x8B;
sfr TH0 = 0x8C;
sfr TH1 = 0x8D;
sfr P1 = 0x90;
sfr SCON = 0x98;
sfr SBUF = 0x99;
sfr IE = 0xA8;
sfr P3 = 0xB0;
sfr IP = 0xB8;
sfr PSW = 0xD0;
sfr ACC = 0xE0;
sfr B = 0xF0;
/*------------------------------------------------
PCON Bit Values
------------------------------------------------*/
#define IDL_ 0x01
#define STOP_ 0x02
#define EWT_ 0x04
#define EPFW_ 0x08
#define WTR_ 0x10
#define PFW_ 0x20
#define POR_ 0x40
#define SMOD_ 0x80
/*------------------------------------------------
TCON Bit Registers
------------------------------------------------*/
sbit IT0 = 0x88;
sbit IE0 = 0x89;
sbit IT1 = 0x8A;
sbit IE1 = 0x8B;
sbit TR0 = 0x8C;
sbit TF0 = 0x8D;
sbit TR1 = 0x8E;
sbit TF1 = 0x8F;
/*------------------------------------------------
TMOD Bit Values
------------------------------------------------*/
#define T0_M0_ 0x01
#define T0_M1_ 0x02
#define T0_CT_ 0x04
#define T0_GATE_ 0x08
#define T1_M0_ 0x10
#define T1_M1_ 0x20
#define T1_CT_ 0x40
#define T1_GATE_ 0x80
#define T1_MASK_ 0xF0
#define T0_MASK_ 0x0F
/*------------------------------------------------
P1 Bit Registers
------------------------------------------------*/
sbit P1_0 = 0x90;
sbit P1_1 = 0x91;
sbit P1_2 = 0x92;
sbit P1_3 = 0x93;
sbit P1_4 = 0x94;
sbit P1_5 = 0x95;
sbit P1_6 = 0x96;
sbit P1_7 = 0x97;
sbit AIN0 = 0x90; /* + Analog comparator input */
sbit AIN1 = 0x91; /* - Analog comparator input */
/*------------------------------------------------
SCON Bit Registers
------------------------------------------------*/
sbit RI = 0x98;
sbit TI = 0x99;
sbit RB8 = 0x9A;
sbit TB8 = 0x9B;
sbit REN = 0x9C;
sbit SM2 = 0x9D;
sbit SM1 = 0x9E;
sbit SM0 = 0x9F;
/*------------------------------------------------
IE Bit Registers
------------------------------------------------*/
sbit EX0 = 0xA8; /* 1=Enable External interrupt 0 */
sbit ET0 = 0xA9; /* 1=Enable Timer 0 interrupt */
sbit EX1 = 0xAA; /* 1=Enable External interrupt 1 */
sbit ET1 = 0xAB; /* 1=Enable Timer 1 interrupt */
sbit ES = 0xAC; /* 1=Enable Serial port interrupt */
sbit ET2 = 0xAD; /* 1=Enable Timer 2 interrupt */
sbit EA = 0xAF; /* 0=Disable all interrupts */
/*------------------------------------------------
P3 Bit Registers (Mnemonics & Ports)
------------------------------------------------*/
sbit P3_0 = 0xB0;
sbit P3_1 = 0xB1;
sbit P3_2 = 0xB2;
sbit P3_3 = 0xB3;
sbit P3_4 = 0xB4;
sbit P3_5 = 0xB5;
/* P3_6 Hardwired as AOUT */
sbit P3_7 = 0xB7;
sbit RXD = 0xB0; /* Serial data input */
sbit TXD = 0xB1; /* Serial data output */
sbit INT0 = 0xB2; /* External interrupt 0 */
sbit INT1 = 0xB3; /* External interrupt 1 */
sbit T0 = 0xB4; /* Timer 0 external input */
sbit T1 = 0xB5; /* Timer 1 external input */
sbit AOUT = 0xB6; /* Analog comparator output */
/*------------------------------------------------
IP Bit Registers
------------------------------------------------*/
sbit PX0 = 0xB8;
sbit PT0 = 0xB9;
sbit PX1 = 0xBA;
sbit PT1 = 0xBB;
sbit PS = 0xBC;
/*------------------------------------------------
PSW Bit Registers
------------------------------------------------*/
sbit P = 0xD0;
sbit FL = 0xD1;
sbit OV = 0xD2;
sbit RS0 = 0xD3;
sbit RS1 = 0xD4;
sbit F0 = 0xD5;
sbit AC = 0xD6;
sbit CY = 0xD7;
/*------------------------------------------------
Interrupt Vectors:
Interrupt Address = (Number * 8) + 3
------------------------------------------------*/
#define IE0_VECTOR 0 /* 0x03 External interrupt 0 */
#define TF0_VECTOR 1 /* 0x0B Timer 0 */
#define IE1_VECTOR 2 /* 0x13 External interrupt 1 */
#define TF1_VECTOR 3 /* 0x1B Timer 1 */
#define SIO_VECTOR 4 /* 0x23 Serial port */
#endif |
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