avr单片机秒表Proteus仿真程序 tm1637数码管显示 -

/**
*版权所有（c）2018，艁ukasz Marcin Podkalicki
*2009年12月13日
*简单定时器（启动/复位/停止），使用基于TM1637的一个按钮和7段显示模块。 *
*注意，这个ATtiny13项目使用的内部时钟并不精确
*时间可以向前或向后流动，但是嘿！
*它仍然足够做一个好的鸡蛋计时器：）
*/
//#include <stdint.h>
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include "tm1637.h"
#define BUTTON_PIN PB2
#define TIMER_UPDATE (1 << 1)
#define TIMER_STOP (1 << 2)
#define TIMER_START (1 << 3)
#define TIMER_RESET (1 << 4)
static volatile uint8_t timer_counter;
static volatile uint8_t timer_events;
static volatile uint8_t timer_seconds;
static volatile uint8_t timer_minutes;
static volatile uint8_t timer_colon;
static void timer_init(void);
static void timer_handler(void);
static void timer_process(void);
static void timer_display(const uint8_t minutes, const uint8_t seconds, const uint8_t colon);
ISR(TIM0_COMPA_vect)
{
timer_handler();
}
int main(void)
{
/* setup */
timer_init();
/* loop */
while (1) {
timer_process();
}
}
void timer_init(void)
{
TM1637_init(1, 4);
DDRB &= ~_BV(BUTTON_PIN); //明确设置按钮针作为输入
PORTB |= _BV(BUTTON_PIN); // 设置按钮销的上拉电阻器
TCCR0A |= _BV(WGM01); // 将计时器计数器模式设置为CTC
TCCR0B |= _BV(CS01)|_BV(CS00); // 将预分频器设置为64（CLK=1200000Hz/64/250=75Hz）
OCR0A = 249; // 设置定时器计数器最大值（250-1）
TIMSK |= _BV(OCIE0A);// 启用定时器CTC中断
timer_counter = timer_seconds = timer_minutes = 0; // 重置计数器
timer_events = TIMER_UPDATE | TIMER_RESET; // 重置计时器和更新显示
timer_colon = 1; // 显示冒号
sei(); //启用全局中断
}
void timer_handler(void)
{
if (!(timer_events & TIMER_START)) {
return;
}
timer_counter++;
if (timer_counter == 38) {
timer_colon = 1;
timer_events |= TIMER_UPDATE;
} else if (timer_counter == 75) {
timer_colon = 0;
timer_counter = 0;
if (++timer_seconds == 60) {
timer_seconds = 0;
if (++timer_minutes == 100) {
timer_minutes = 0;
}
}
timer_events |= TIMER_UPDATE;
}
}
void timer_process(void)
{
/* 过程启动/停止/重置 */
if ((PINB & _BV(BUTTON_PIN)) == 0) {
_delay_ms(10); // 去噪时间
while((PINB & _BV(BUTTON_PIN)) == 0);
if (timer_events & TIMER_START) {
timer_colon = 1;
timer_events = TIMER_UPDATE | TIMER_STOP;
} else if (timer_events & TIMER_STOP) {
timer_minutes = timer_seconds = 0;
timer_colon = 1;
timer_events = TIMER_UPDATE | TIMER_RESET;
} else if (timer_events & TIMER_RESET) {
timer_events = TIMER_START;
}
}
/* 更新显示 */
if (timer_events & TIMER_UPDATE) {
timer_display(timer_minutes, timer_seconds, timer_colon);
timer_events &= ~TIMER_UPDATE;
}
}
void timer_display(const uint8_t minutes, const uint8_t seconds, const uint8_t colon)
{
/* 显示分钟数*/
TM1637_display_digit(0, minutes / 10);
TM1637_display_digit(1, minutes % 10);
/* 显示秒数 */
TM1637_display_digit(2, seconds / 10);
TM1637_display_digit(3, seconds % 10);
/* 显示/隐藏冒号 */
TM1637_display_colon(colon);
}

复制代码