avr的M16单片机：在INT1中启动定时器为什么不准？

只看该作者 · 2014-7-23 15:31

/******************************************************************************/
//中断向量：
//iv_TIM0_OVF:10
//iv_TIM1_OVF:9
//iv_TIM2_OVF:5
//int0: PD2
//int1: PD3

#include <iom16v.h>
#include <macros.h>

#define CTLPORTD    PORTD
#define SW9    0
#define SW10       1

#define SET_SW9    CTLPORTD|=(1<<SW9)
#define CLR_SW9    CTLPORTD&=~(1<<SW9)

#define SET_SW10 CTLPORTD|=(1<<SW10)
#define CLR_SW10    CTLPORTD&=~(1<<SW10)

unsigned char t0_ovfnum;//t0软件定时计数器
unsigned char t1_ovfnum;//t1软件定时计数器
unsigned char t2_ovfnum;//t1软件定时计数器

unsigned char K9_fnum=0,K10_fnum=0;//K9为右侧翻身按键，K10为左侧翻身按键


void timer0_init(void);//32.68ms
void timer1_init(void);//10ms
void timer2_init(void);//10ms
void interrupt_init(void);

void main(void)
{
unsigned char n;
timer1_init();
port_init();
interrupt_init();
while(1)
{
;
}
}
void port_init(void)
{
DDRD = 0xF3; //INT0，INT1对应的上拉电阻有效
PORTD = 0xFF;
PORTA =0x00;
}
void interrupt_init(void)
{
CLI();
MCUCR = 0x0A;//外部中断1，外部中断0均为下降沿产生中断
GICR = 0xC0;//开外部中断0,1；
TIMSK = 0;
SEI();       //开总中断
}
#pragma interrupt_handler int1_isr:3
void int1_isr (void)
{
   PORTA =0x00;
   CLI();
   K9_fnum++;
   TIMSK |= 0x04; //timer interrupt sources
   GICR = 0xC0;
}

//TIMER1 initialize - prescale:64
// WGM: 0) Normal, TOP=0xFFFF
// desired value: 10mSec
// actual value: 10.000mSec (0.0%)
void timer1_init(void)
{
TCCR1B = 0x00; //stop
TCNT1H = 0x00; //setup
TCNT1L = 0x67;
OCR1AH = 0x69;
OCR1AL = 0xE2;
OCR1BH = 0x04;
OCR1BL = 0xE2;
ICR1H  = 0x04;
ICR1L  = 0xE2;
TCCR1A = 0x00;
TCCR1B = 0x05; //start Timer
//TIMSK |= 0x04; //timer interrupt sources
}

#pragma interrupt_handler timer1_ovf_isr:9
void timer1_ovf_isr(void)
{
TCNT1H = 0x67; //reload counter high value
TCNT1L = 0x69; //reload counter low value
//t1_ovfnum++;
PORTA =0xFF;
}

//TIMER2 initialize - prescale:1024
// WGM: Normal
// desired value: 10mSec
// actual value:  9.984mSec (0.2%)
void timer2_init(void)
{
TCCR2 = 0x00; //stop
ASSR  = 0x00; //set async mode
TCNT2 = 0xB2; //setup
OCR2  = 0x4E;
TCCR2 = 0x07; //start
TIMSK |= 0x40; //timer interrupt sources
}

#pragma interrupt_handler timer2_ovf_isr:5
void timer2_ovf_isr(void)
{
TCNT2 = 0xB2; //reload counter value
t2_ovfnum ++;
if(t2_ovfnum == 200)//500ms
{
t2_ovfnum = 0;
PORTD^=BIT(2);//LED电平取反

}
}
/*
程序功能:
k9按键按下，继电器K1动作，平衡信号为高电平；
当平衡信号为低电平时，即到达平恒位置，此时k9按键5S时间内失灵，即K1断开；
5s延时后，再次按K9按键，按键正常工作。
*/

只看该作者 · 2014-7-23 15:33

问题补充：
外部中断1中启动定时器1，为了延时5s，可怎么测试着延时时间又长又短呢？而且不是定值

只看该作者 · 2014-7-23 19:04

你的INT1中断处理函数关总中断了，没有打开吗

1万 · 2014-7-23 21:22

标志寄存器也是要清的

只看该作者 · 2014-7-24 10:28

我记得见过这个历程，没有不准啊

只看该作者 · 2014-7-24 13:25

star21 发表于 2014-7-24 10:28
我记得见过这个历程，没有不准啊

有没有相关的例程，可以发一下吗？

只看该作者 · 2014-7-24 17:13

#define  uchar  unsigned char
#define  uint unsigned int
#include <iom16v.h>
#include <macros.h>

unsigned char t0_ovfnum;//t0软件定时计数器
unsigned char t1_ovfnum;//t1软件定时计数器
unsigned char t2_ovfnum;//t1软件定时计数器

void timer0_init(void);//10ms
void timer1_init(void);//10ms
void timer2_init(void);//10ms

void main(void)
{
unsigned char n;
DDRD= 0xFF;
PORTD=0xFF;
timer0_init();//初始化定时器0
timer1_init();//初始化定时器1
timer2_init();//初始化定时器2
SEI();       //开总中断
while(1)
{
}
}

//TIMER0 initialize - prescale:1024
// WGM: Normal
// desired value: 10mSec
// actual value:  9.984mSec (0.2%)
void timer0_init(void)//10ms
{
TCCR0 = 0x00; //stop
TCNT0 = 0xB2; //set count
OCR0  = 0x4E;  //set compare
TCCR0 = 0x05; //start timer
    TIMSK |= 0x01; //timer interrupt sources
}

#pragma interrupt_handler timer0_ovf_isr:iv_TIM0_OVF
void timer0_ovf_isr(void)
{
TCNT0 = 0xB2; //reload counter value
t0_ovfnum ++;
if(t0_ovfnum == 50)//500ms
{
t0_ovfnum = 0;
PORTD^=BIT(0);//LED电平取反
//LED_PORT ^= BIT(LED1);
}
}

//TIMER1 initialize - prescale:64
// WGM: 0) Normal, TOP=0xFFFF
// desired value: 10mSec
// actual value: 10.000mSec (0.0%)
void timer1_init(void)
{
TCCR1B = 0x00; //stop
TCNT1H = 0xFB; //setup
TCNT1L = 0x1E;
OCR1AH = 0x04;
OCR1AL = 0xE2;
OCR1BH = 0x04;
OCR1BL = 0xE2;
ICR1H  = 0x04;
ICR1L  = 0xE2;
TCCR1A = 0x00;
TCCR1B = 0x03; //start Timer
TIMSK |= 0x04; //timer interrupt sources
}

#pragma interrupt_handler timer1_ovf_isr:iv_TIM1_OVF
void timer1_ovf_isr(void)
{
//TIMER1 has overflowed
TCNT1H = 0xFB; //reload counter high value
TCNT1L = 0x1E; //reload counter low value
t1_ovfnum ++;
if(t1_ovfnum == 100)//500ms
{
t1_ovfnum = 0;
      PORTD^=BIT(1);//LED电平取反
//LED_PORT ^= BIT(LED3);
}
}

//TIMER2 initialize - prescale:1024
// WGM: Normal
// desired value: 10mSec
// actual value:  9.984mSec (0.2%)
void timer2_init(void)
{
TCCR2 = 0x00; //stop
ASSR  = 0x00; //set async mode
TCNT2 = 0xB2; //setup
OCR2  = 0x4E;
TCCR2 = 0x07; //start
TIMSK |= 0x40; //timer interrupt sources
}

#pragma interrupt_handler timer2_ovf_isr:iv_TIM2_OVF
void timer2_ovf_isr(void)
{
TCNT2 = 0xB2; //reload counter value
t2_ovfnum ++;
if(t2_ovfnum == 200)//500ms
{
t2_ovfnum = 0;
PORTD^=BIT(2);//LED电平取反

}
}