#include <iom48v.h>
#include <macros.h>
#include "delay.h"
//局部变量
unsigned char zhouchang;
unsigned int time;
unsigned long num,sudu;
//全局变量
extern unsigned char mode;
//TIMER1中断声明
#pragma interrupt_handler Timer1_OVF_ISR:iv_TIMER1_OVF
//脉冲中断声明
#pragma interrupt_handler pcint3_isr:iv_WDT
//圈数脉冲
void pcint3_isr(void)
{
// SEI();
if(PINB==0b00000011) //圈数脉冲
{
num++;
sudu=360000/time*zhouchang;
time=0;
}
if(PINB==0b00001001) //上按键 调整按键
{
if(mode==2)
{
zhouchang++;
if(zhouchang==0)
{
zhouchang=100;
}
}
}
if(PINB==0b00001010) //下按键 模式按键
{
mode++;
if(mode==4)
{
mode=0;
}
}
}
//定时器1中断函数
void Timer1_OVF_ISR(void)
{
// SEI();
TCCR1B=0x00;
TCNT1H=0xD8;
TCNT1L=0xF0;
TCCR1B=0x01;
time++;
if(time==500) //5秒超时归零
{
time=0;
sudu=0;
}
}
void main(void)
{
//初始化变量
mode=0;
zhouchang=152;
sudu=0;
//定时器中断
TCNT1H=0xD8;
TCNT1L=0xF0;
TCCR1B=0x01;
TIMSK1=0X01;
//脉冲中断
DDRB=0xF4; //PB0 PB1 口用作上下按键 PB3为圈数脉冲 均为输入
PORTB=0x0B; //打开 PB0 PB1 PB3 上拉电阻
PCICR=0x01; //开启PCINT0-7中断
PCMSK0=0x0B; //使用PB0 PB1 PB3引脚电平变化中断
SEI(); //开启中断
while(1)
{
if(mode==0) //mode=0 显示速度
{
display(sudu);
}
if(mode==1) //mode=1 显示距离
{
display(num*zhouchang);
}
if(mode==2) //mode=2 显示周长
{
display(zhouchang);
}
if(mode==3)
{
display(time);
}
}
}
lichengbiao.rar_atmega48_atmega48 pd_电动车_速度里程_里程表
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2022-09-22
22:23:17
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lichengbiao.rar_atmega48_atmega48 pd_电动车_速度里程_里程表 （237个子文件） 
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