51单片机里面的定时器2如何使用中断

ID:440202 · 发表于 2018-12-15 11:55

void init2()
{
T2CON|=0x04;

EXEN2=0;
TH2=0xff;
RCAP2H=0xff;
TL2=0xf7;
RCAP2L=0xf7;
EA=1;
ET2=1;
TF2=1;
PT2=0;
TR2=1;
}

ID:277550 · 发表于 2018-12-15 14:47

/* interrupt vector */
#define INT0_VECTOR 0
#define TIMER0_VECTOR 1
#define INT1_VECTOR 2
#define TIMER1_VECTOR 3
#define UART1_VECTOR 4
#define ADC_VECTOR 5
#define LVD_VECTOR 6
#define PCA_VECTOR 7
#define UART2_VECTOR 8
#define SPI_VECTOR 9
#define INT2_VECTOR 10
#define INT3_VECTOR 11
#define TIMER2_VECTOR 12
#define INT4_VECTOR 16
#define UART3_VECTOR 17
#define UART4_VECTOR 18
#define TIMER3_VECTOR 19
#define TIMER4_VECTOR 20
#define CMP_VECTOR 21

ID:230975 · 发表于 2019-11-23 15:20

#include "reg51.h"
#include "intrins.h"

//测试工作频率为11.0592MHz

sfr    T2L       = 0xd7;
sfr    T2H       = 0xd6;
sfr    AUXR       = 0x8e;
sfr    IE2       = 0xaf;
#define ET2          0x04
sfr    AUXINTIF = 0xef;
#define T2IF          0x01

sbit P10       = P1^0;

void TM2_Isr() interrupt 12 using 1
{
P10 = !P10;                               //测试端口
AUXINTIF &= ~T2IF;                         //清中断标志
}

void main()
{
T2L = 0x66;                               //65536-11.0592M/12/1000
T2H = 0xfc;
AUXR = 0x10;                               //启动定时器
IE2 = ET2;                               //使能定时器中断
EA = 1;

while (1);
}

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