key.c

单片机项目19-电子日历（1602显示）

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit key_set = P1^4;
sbit key_rset = P1^5;
sbit key_up = P1^6;
sbit key_down = P1^7;
bit key_set_s,key_rset_s,key_up_s,key_down_s;
uchar key_set_flag;
uchar time_tmp[7];
uchar i;
void key(void)
{
	
//设定键按下，第一次跳年，同时年闪烁，第二次调月，月闪烁，一次类推	
	if(key_set == 0)
	{
		delay(300);
		if(key_set == 0)
		{	
			delay(300);
			key_set_s = 1;
		}
	}	
	if(key_set == 1 && key_set_s == 1)
	{
		key_set_s = 0;
		key_set_flag++;
		if(key_set_flag >= 8)
		key_set_flag = 1;
		time_tmp[0] = year;
		time_tmp[1] = moon;
		time_tmp[2] = date;
		time_tmp[3] = week;
		time_tmp[4] = hour;
		time_tmp[5] = min;
		time_tmp[6] = sec;
	}
//确认键按下，正常显示
	if(key_rset == 0)
	{
		delay(300);
		if(key_rset == 0)
		{	
			delay(300);
			key_rset_s = 1;
		}
	}	
	if(key_rset == 1 && key_rset_s == 1)
	{
		key_rset_s = 0;
		key_set_flag = 0;
		for(i = 0;i < 8;i++)
		{
			DEC_BCD_conv(time_tmp[i]);
		}
		write_ds1302_add_dat(0x8e,0x00);		 //写允许
		write_ds1302_add_dat(0x8c,time_tmp[0]);	 //写年
		write_ds1302_add_dat(0x86,time_tmp[1]);	 //写月
		write_ds1302_add_dat(0x88,time_tmp[2]);	 //写日
		write_ds1302_add_dat(0x8a,time_tmp[3]);	 //写周
		write_ds1302_add_dat(0x84,time_tmp[4]);	 //写时
		write_ds1302_add_dat(0x82,time_tmp[5]);	 //写分
		write_ds1302_add_dat(0x80,time_tmp[6]);	 //写秒
	 	write_ds1302_add_dat(0x8e,0x80);
	}
//加键按下	
	if(key_up == 0)
	{
		delay(300);
		if(key_up == 0)
		{	
			delay(300);
			key_up_s = 1;
		}
	}	
	if(key_up == 1 && key_up_s == 1)
	{
		key_up_s = 0;
		time_tmp[key_set_flag - 1]++;		
	}	
	if(key_down == 0)
	{
		delay(300);
		if(key_down == 0)
		{	
			delay(300);
			key_down_s = 1;
		}
	}	
	if(key_down == 1 && key_down_s == 1)
	{
		key_down_s = 0;
		time_tmp[key_set_flag - 1]--;		
	}
}