电子闹钟（atmega16）

电子闹钟

功能要求：

1、实时时钟（由数码管显示时:分，中间的“：”一亮一灭表示1秒，可用小数点表示，也可以用一个LED表示）；

2、时钟的时、分可调节；

3、闹钟时间可以设置，闹钟初值为8：00，（并保存在EEPROM中，掉电不丢失）；

4、闹钟时间到，蜂鸣器响10秒；

5、按键使用数量不宜超过5个；

6、整点时间，通过串行口上传一次时钟信息；

7、自行补充新功能（选做项）；

单片机型号：atmega16

流程图

proteus模拟电路图：

代码（适用于atmega16实物，如需用以上电路图模拟还需修改IO口配置）

#include <iom16v.h>
#include <macros.h>unsigned char led_buf[] = { 0x3F, 0x06, 0x5B, 0x4F,0x66, 0x6D, 0x7D, 0x07,0x7F, 0x6F };  //共阴极数码管编码表,分别表示0~f;
unsigned char position[6] = { 0xfe, 0xfd, 0xef, 0xdf, 0xbf, 0x7f }; // 位选码
unsigned char show[] = "NOW IS : ";
unsigned char transmit_time[10] = "0123456789";
unsigned char maohao = ':', temp[6];
unsigned char time[3], time_set[3], YuSheTime[3] = { 0, 0, 8 }; //时、分、秒计数和设置单元及定时时间8:00,确保掉电不清除
unsigned char dis_buf[10]; //显示缓冲区，存放要显示的10个字符的段码值
unsigned char  timecounterofkeys, timecounter;
unsigned char clock_state = 2, set_state, return_time;
int time_add, point, set_on, time_1second, key_stime_ok;#define key_input PINB //按键输入口
#define key_mask 0B00001111 //按键输入屏蔽码
#define key_no 0
#define key_s1 1 //s1按键
#define key_s2 2 //s2按键
#define key_s3 3 //s3按键
#define key_s4 4 //s4按键
#define key_state_0 0 //按键状态0 1 2
#define key_state_1 1
#define key_state_2 2void io_init(void);//I/O口初始化函数//
void T0_init(void);//T/C0初始化函数///
void usart_init(unsigned int baud);//usart初始化//
void usart_transmit_byte(unsigned char data);//发送一个字符//
void usart_transmit_string(unsigned char* buf);//发送一个字符串//
unsigned char usart_recieve_byte(void);//接收一个字符//
void time_to_disbuffer(unsigned char* time);//时钟时间送显示缓冲区函数//
void display(void);//时钟时间送显示缓冲区函数//
void timer0_comp_isr(void);//显示输出函数///
unsigned char read_key(void);//读取按键函数//
void time_dealer(void)；//时间处理函数//
void zhengdianhanshu(void)；//整点时间函数//
void main(void);//主函数//I/O口初始化函数//
void io_init(void)
{DDRC = 0xFF; //LED段码输出DDRD = 0xfe;  //LED位控输出(1111 1110)PORTD = 0xFF; //输出高电平DDRB = 0xe0; //按钮输入口(1110 0000)PORTB = 0xFF;DDRA = 0xff;  //输出口PORTA = 0xff; //输出高电平
}///T/C0初始化函数///
void T0_init(void)
{OCR0 = 0xF9;  //OCR0 = 0xF9(249),(249+1)/125=2msTCCR0 = 0x0B; //内部时钟，CTC模式，64分频，8M/64=125KHz
}usart初始化//
void usart_init(unsigned int baud)
{UBRRH = (unsigned char)(baud >> 8);UBRRL = (unsigned char)baud;         // 波特率:4800，时钟频率:8MHz (0110 0111)UCSRA = 0x20;UCSRB = (1 << TXEN) | (1 << RXEN);   //发送使能|接收时能(0001 1000)UCSRC = (1 << URSEL) | (3 << UCSZ0); //异步模式,帧格式:1个起始位,8个数据位,无校验,1个停止位;
}
发送一个字符//
void usart_transmit_byte(unsigned char data)
{while (!(UCSRA & (1 << UDRE))){;}UDR = data;
}
计时器Timer0:比较匹配中断服务,定时:2ms
#pragma interrupt_handler timer0_comp_isr: iv_TIMER0_COMP //计时器Timer0:比较匹配输出
void timer0_comp_isr(void)
{display();if (++timecounterofkeys >= 5){timecounterofkeys = 0;key_stime_ok = 1;  //10ms时,给key_stime_ok赋值为1if (!(++timecounter % 25)){set_on = !set_on;}if (timecounter >= 100) //判断是否达到一秒{timecounter = 0;time_1second = 1;}}
}
发送一个字符串//
void usart_transmit_string(unsigned char* databuf)
{while (*databuf != '\0'){usart_transmit_byte(*databuf++);}
}接收一个字符//
unsigned char usart_recieve_byte(void)
{// 等待接收数据while (!(UCSRA & (1 << RXC)));// 从缓冲器中获取并返回数据return UDR;
}时钟时间送显示缓冲区函数//
void time_to_disbuffer(unsigned char* time)
{unsigned char i, j = 0;for (i = 0; i <= 2; i++){dis_buf[j++] = time[i] % 10;dis_buf[j++] = time[i] / 10;}
}///显示输出函数///
void display(void)
{static unsigned char posit = 2; //从分钟开始显示PORTD = 0xFF; //!输出高电平PORTC = led_buf[dis_buf[posit]]; //缓存段码if (set_on && (posit == clock_state)) //被调位闪烁{PORTC = 0x00;}if (point && posit == 4) //控制第四位小数点闪烁{PORTC |= 0x80;}PORTD = position[posit]; //控制输出的位if (++posit >= 6){posit = 2;          //从分钟开始显示}
}读取按键函数//
unsigned char read_key(void)
{static unsigned char key_state = 0, key_press;unsigned char key_return = key_no; //相当于key_return =0;key_press = key_input & key_mask; //读取按键I/O电平switch (key_state){case key_state_0: //按键初始态if (key_press != key_mask){key_state = key_state_1;}break; //键被按下,状态转换到键确认态case key_state_1: //按键确认态if (key_press == (key_input & key_mask)){if (key_press == 0b00001110){key_return = key_s1;}else if (key_press == 0b00001101){key_return = key_s2;}else if (key_press == 0b00001011){key_return = key_s3;}else if (key_press == 0b00000111){key_return = key_s4;}key_state = key_state_2; // 状态转换到键释放态}else{key_state = key_state_0; // 按键已抬起，转换到按键初始态}break;case key_state_2:if (key_press == key_mask){key_state = key_state_0;}break; //按键已释放，转换到按键初始态}return key_return;
}
//时间处理函数//
void time_dealer(void)
{while (1){if (++time[0] >= 60)      // 秒加1{time[0] = 0;          //秒超过60,秒数清0if (++time[1] >= 60){time[1] = 0;         //分数超过60,分清0if (++time[2] >= 24){time[2] = 0;     //时超过24,时清0}}}}
} //整点时间函数//
void zhengdianhanshu(void)//整点时间，通过串行口上传一次时钟信息/
{if ((time[1] == 0) && (time[0] == 0)) //分秒同时为零,表示整点,向串口上传一次时间{temp[5] = time[2] % 10;temp[4] = (unsigned char)time[2] / 10;temp[3] = time[1] % 10;temp[2] = (unsigned char)time[1] / 10;temp[1] = time[0] % 10;temp[0] = (unsigned char)time[0] / 10;usart_transmit_string(show);usart_transmit_byte(transmit_time[temp[4]]);usart_transmit_byte(transmit_time[temp[5]]);usart_transmit_byte(maohao);usart_transmit_byte(transmit_time[temp[2]]);usart_transmit_byte(transmit_time[temp[3]]);usart_transmit_byte(maohao);usart_transmit_byte(transmit_time[temp[0]]);usart_transmit_byte(transmit_time[temp[1]]);usart_transmit_string("\r\n");}
}
主函数//
void main(void)
{unsigned char key_temp, i;//初始化T0_init(); //T/C0初始化io_init(); //I/O口初始化usart_init(103); //usart初始化,波特率设置为4800;//设时间初值07:59:00time[2] = 7;time[1] = 59;time[0] = 0;TIMSK = 0x12; //允许T/C1比较匹配A中断,允许T/C0比较匹配中断,开放全局中断SEI();while (1){if (time_1second) //1秒到{time_1second = 0;point = ~point; //闪烁标志,一秒亮，一秒灭//     time_dealer();if (++time[0] >= 60) //! 秒加1，{time[0] = 0;         //!秒数超过60,秒数清0if (++time[1] >= 60) //!分加1{time[1] = 0;         //!分数超过60,分数清0if (++time[2] >= 24) //!时加1{time[2] = 0; //!时数超过24,时数清0}}}//最初十秒不操作就进入初始设置时间if ((++return_time >= 10) && (clock_state != 6)){clock_state = 6;}if (clock_state == 6){time_to_disbuffer(time);}zhengdianhanshu();/*整点时间，通过串行口上传一次时钟信息*/
/*            if ((time[1] == 0) && (time[0] == 0)) //!分钟,秒钟为零,表示整点,就上传一次时间{temp[5] = time[2] % 10;temp[4] = (unsigned char)time[2] / 10;temp[3] = time[1] % 10;temp[2] = (unsigned char)time[1] / 10;temp[1] = time[0] % 10;temp[0] = (unsigned char)time[0] / 10;usart_transmit_string(show);usart_transmit_byte(transmit_time[temp[4]]);usart_transmit_byte(transmit_time[temp[5]]);usart_transmit_byte(maohao);usart_transmit_byte(transmit_time[temp[2]]);usart_transmit_byte(transmit_time[temp[3]]);usart_transmit_byte(maohao);usart_transmit_byte(transmit_time[temp[0]]);usart_transmit_byte(transmit_time[temp[1]]);usart_transmit_string("\r\n");}
*//*设定闹钟时间到，蜂鸣器响10秒*/if ((time[2] == YuSheTime[2]) && (time[1] == YuSheTime[1]) && (time[0] == YuSheTime[0])){PORTA = 0x7f; //(0111 1111),低电平蜂鸣器响}if ((time[2] == YuSheTime[2]) && (time[1] == YuSheTime[1]) && (time[0] == YuSheTime[0] + 10)){PORTA = 0xff; //(1111 1111),高电平蜂鸣器关}}if (key_stime_ok) //10ms到，键处理{key_stime_ok = 0;key_temp = read_key(); //调用按键接口程序if (key_temp) //确认有按键按下{return_time = 0;        //置零时间,直至等待十秒不操作if (key_temp == key_s1) // s1键按下,设定时钟时间功能{if (++clock_state >= 7){clock_state = 2;}if (clock_state == 2){for (i = 0; i <= 2; i++){time_set[i] = 0;}time_to_disbuffer(time_set);}if (clock_state == 6){for (i = 0; i <= 2; i++){time[i] = time_set[i];}time_to_disbuffer(time);}}if (key_temp == key_s2)   //s2键按下，设定闹钟时间功能{if (++clock_state >= 7){clock_state = 2;}if (clock_state == 2)   //不按按钮,设定闹钟初始值为08:00{time_to_disbuffer(YuSheTime);}if (clock_state == 6){for (i = 0; i <= 2; i++){YuSheTime[i] = time_set[i];}time_to_disbuffer(YuSheTime);}}if ((clock_state != 6) && (key_temp == key_s3))  //每按一下s3，被调试位数值加一{if (clock_state % 2){time_set[clock_state / 2] += 10;}else{if ((time_set[clock_state / 2] % 10) == 9){time_set[clock_state / 2] -= 9;}else{time_set[clock_state / 2] += 1;}}if (time_set[0] >= 60){time_set[0] -= 60;}if (time_set[1] >= 60){time_set[1] -= 60;}if (time_set[2] >= 24){time_set[2] -= 10;}time_to_disbuffer(time_set);  //设置时间送入显示缓存}if (key_temp == key_s4)   //s4按下,向串口传输当前时间{temp[5] = time[2] % 10;temp[4] = (unsigned char)time[2] / 10;temp[3] = time[1] % 10;temp[2] = (unsigned char)time[1] / 10;temp[1] = time[0] % 10;temp[0] = (unsigned char)time[0] / 10;usart_transmit_string(show);usart_transmit_byte(transmit_time[temp[4]]);usart_transmit_byte(transmit_time[temp[5]]);usart_transmit_byte(maohao);usart_transmit_byte(transmit_time[temp[2]]);usart_transmit_byte(transmit_time[temp[3]]);usart_transmit_byte(maohao);usart_transmit_byte(transmit_time[temp[0]]);usart_transmit_byte(transmit_time[temp[1]]);usart_transmit_string("\r\n");}}}}
}

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