文件仅供参考：
链接：https://pan.baidu.com/s/1yUigOtG7_7a2sxrYD_KB-Q
提取码：tviy

硬件设计

功能：
1、8位数码管显示当前时间。
2、使用DS1302获得时钟信号，能够进行时钟设置
3、能够设置10组打铃时间，并具有临时打铃功能，打铃的时长为5S钟
4、使用1602液晶屏幕显示。

仿真图：

程序设计

#include <all.h>

u8 LCD1602_Cursor_address=0;	//光标标记
//	uchar code degree[]={0x16,0x09,0x08,0x08,0x08,0x09,0x06,0x00};  //摄氏度 符号

 bit lcd_busy_test(void) 		//忙状态监测
{
  bit result;
  RS=0;           
  RW=1;
  EN=1;
  _nop_();
  _nop_();
  _nop_();
  _nop_();
  result = (bit)(DB&0x80);
  EN=0;
  return result;
}

void lcd_write_cmd (u8 cmd)	//写命令
{
  while (lcd_busy_test());
  RS=0;
  RW=0;
  EN=0;
  _nop_();
  _nop_();
  DB=cmd ;
  _nop_();
  _nop_();
  _nop_();
  _nop_();
  EN=1;
  _nop_();
  _nop_();
  _nop_();
  _nop_();
  EN=0;
}

void lcd_position (u8 pos)//显示起始位置
{
	if(pos<16)
		lcd_write_cmd (pos|0x80);
	else
		lcd_write_cmd (((pos)-16)|0xC0);
}

void lcd_write_data (u8 dat)//写数据
{
   while (lcd_busy_test());
  RS=1;
  RW=0;
  EN=0;
  _nop_();
  _nop_();
  DB=dat ;
  _nop_();
  _nop_();
  _nop_();
  _nop_();
  EN=1;
  _nop_();
  _nop_();
  _nop_();
  _nop_();
  EN=0;
}

//初始化
void lcd_start (void)
{
  lcd_write_cmd (0x01);
  delay_ms(1);
  lcd_write_cmd (0x02);
  delay_ms(1);
  lcd_write_cmd (0x06);
  delay_ms(1);
  lcd_write_cmd (0x0c);
  delay_ms(1);
  lcd_write_cmd (0x14);
  delay_ms(1);
  lcd_write_cmd (0x38);
  delay_ms(1);

}

void lcd_CLS()
{
	data u8 i;
	lcd_position(0x80);
	for(i=0;i<16;i++)
		lcd_write_data(' ');
	lcd_position(0xc0);
	for(i=0;i<16;i++)
		lcd_write_data(' ');
}

void LCD_1602_Cursor_address()				//光标状态
{
	switch(LCD1602_Cursor_address)
	{
		case 0:lcd_write_cmd(0x0c);break;//不显示
		//(先开启 0x0f,后地址,上0x8,下0xc)          
		case 1:lcd_write_cmd(0x0f);lcd_write_cmd(0xcb);break;//时间秒		
		case 2:lcd_write_cmd(0x0f);lcd_write_cmd(0xc8);break;//时间分
		case 3:lcd_write_cmd(0x0f);lcd_write_cmd(0xc5);break;//时间时
		case 4:lcd_write_cmd(0x0f);lcd_write_cmd(0x8c);break;//星期
		case 5:lcd_write_cmd(0x0f);lcd_write_cmd(0x8a);break;//时间日
		case 6:lcd_write_cmd(0x0f);lcd_write_cmd(0x87);break;//时间月
		case 7:lcd_write_cmd(0x0f);lcd_write_cmd(0x84);break;//时间年
	}
}


void lcd_printf_Ds1302()			//正常模式显示
{
	lcd_position(3);
	lcd_write_data(Time[6]/16%16+'0');//时间年显示
	lcd_write_data(Time[6]%16+'0');
	lcd_write_data('/');
	
	lcd_write_data(Time[5]/16%16+'0');//时间月显示
	lcd_write_data(Time[5]%16+'0');
	lcd_write_data('/');
	
	lcd_write_data(Time[4]/16%16+'0');//时间日显示
	lcd_write_data(Time[4]%16+'0');
	lcd_write_data('/');
	
	lcd_write_data(Time[3]%16+'0');//星期显示

	lcd_position(20);
	
	lcd_write_data(Time[2]/16%16+'0');//时间时显示
	lcd_write_data(Time[2]%16+'0');
	lcd_write_data('/');
	
	lcd_write_data(Time[1]/16%16+'0');//时间分显示
	lcd_write_data(Time[1]%16+'0');
	lcd_write_data('/');
	
	lcd_write_data(Time[0]/16%16+'0');//时间秒显示
	lcd_write_data(Time[0]%16+'0');
}

void lcd_printf_Ring()					//铃声调整数据显示
{
	lcd_position(20);
	
	lcd_write_data(Ring_Data[Ring][2]/16%16+'0');//时间时显示
	lcd_write_data(Ring_Data[Ring][2]%16+'0');
	lcd_write_data('/');
	
	lcd_write_data(Ring_Data[Ring][1]/16%16+'0');//时间分显示
	lcd_write_data(Ring_Data[Ring][1]%16+'0');
	lcd_write_data('/');
	
	lcd_write_data(Ring_Data[Ring][0]/16%16+'0');//时间秒显示
	lcd_write_data(Ring_Data[Ring][0]%16+'0');
}

void Alarm_Clock()				//铃声调整数据处理
{
	if(Key4x4A=='+')
	{
		Key4x4_tt=0;Key4x4A=0;
		
		Ring_Data[Ring][LCD1602_Cursor_address-1]++;
		
		if((Ring_Data[Ring][LCD1602_Cursor_address-1]&0x0f)>9) //十进制转BCD码
			(Ring_Data[Ring][LCD1602_Cursor_address-1])+=6;
		if(Ring_Data[Ring][0]>0x59)			//数据限制
			Ring_Data[Ring][0]=0x00;
		
		if(Ring_Data[Ring][1]>0x59)			//数据限制
			Ring_Data[Ring][1]=0x00;
		
		if(Ring_Data[Ring][2]>0x23)			//数据限制
			Ring_Data[Ring][2]=0x00;
		
		lcd_printf_Ring();					//铃声调整数据刷新
	}
	
	if(Key4x4A=='-')
	{
		Key4x4_tt=0;Key4x4A=0;
		
		if(Ring_Data[Ring][LCD1602_Cursor_address-1]>0)			//数据限制
			Ring_Data[Ring][LCD1602_Cursor_address-1]--;
		
		if((Ring_Data[Ring][LCD1602_Cursor_address-1]&0x0f)>9)	//十进制转BCD码
			(Ring_Data[Ring][LCD1602_Cursor_address-1])-=6;
		
		lcd_printf_Ring();					//铃声调整数据刷新
	}
}

void Time_Settings()						//时间调整数据处理
{
	if(Key4x4A=='+')
	{
		Key4x4_tt=0;Key4x4A=0;
		Time[LCD1602_Cursor_address-1]++;
		
		if((Time[LCD1602_Cursor_address-1]&0x0f)>9)	//十进制转BCD码
			(Time[LCD1602_Cursor_address-1])+=6;
		if(Time[0]>0x59)		//数据限制
			Time[0]=0x00;
		
		if(Time[1]>0x59)		//数据限制
			Time[1]=0x00;
		
		if(Time[2]>0x23)		//数据限制
			Time[2]=0x00;
		
		if(Time[3]>0x07)		//数据限制
			Time[3]=0x07;
		
		if(Time[4]>0x31)		//数据限制
			Time[4]=0x00;
		
		if(Time[5]>0x12)		//数据限制
			Time[5]=0x00;
		
		if(Time[6]>0x99)		//数据限制
			Time[6]=0x00;
		
		lcd_printf_Ds1302();	//时间调整数据刷新
	}
	

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