c8051f020单片机数字时钟Word文档格式.docx
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c8051f020单片机数字时钟Word文档格式.docx
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OSCXCN=0x67;
//外部晶振22.1184MHz
for(i=0;
i<
256;
i++);
while(!
(OSCXCN&
0x80));
//等待外部晶振稳定
OSCICN=0x88;
//选择外部晶振作系统时钟源,允许时钟丢失检测
}
//*****端口初始化*****//
voidPORT_Init(void)
XBR0=0x07;
//允许SMBus、SPI0和UART0
XBR1=0x00;
XBR2=0x44;
//使能交叉开关和弱上拉
//*****定时器T0初始化*****//
voidTimer0_Init(void)
CKCON|=0x8;
//T0按系统时钟频率计数
TMOD|=0x1;
//T0方式1
Count1ms=10;
TR0=0;
//停止T0
TH0=(-SYSCLK/1000)>
>
8;
//定时1ms的时间常数
TL0=-SYSCLK/1000;
TR0=1;
//启动T0
IE|=0x2;
//开T0中断
//*****定时器T0中断服务程序(每隔1ms中断1次)*****//
voidTimer0_ISR(void)interrupt1
TH0=(-SYSCLK/1000)>
//重新装入初值
if(Count1ms)Count1ms--;
//定时时间减1
//******延时Tμs(软件实现)******//
voidDelay1us(unsignedcharT)
while(T)
{
_nop_();
--T;
}
//******延时Tms(定时器T0实现)******//
voidDelay1ms(unsignedcharT)
Count1ms=T;
while(Count1ms);
//在T0中断服务程序中减1
//*****延时Ts(定时器T0实现)******//
voidDelay1s(unsignedcharT)
Delay1ms(200);
T--;
voidSend7279Byte(unsignedcharch)
{
chari;
SELECT7279;
//置CS低电平
Delay1us(50);
//延时50μ
i<
8;
i++)
{
if(ch&
0x80)//输出1位到HD7279A的DATA端
Set7279DAT;
else
Clr7279DAT;
Set7279CLK;
ch=ch<
<
1;
//待发数据左移
Delay1us(8);
Clr7279CLK;
Clr7279DAT;
//发送完毕,DATA端置低,返回
//*****仿真I2C总线时序接收一字节*****//
unsignedcharReceive7279Byte(void)
unsignedchari,ch=0;
Set7279DAT;
//DATA端置为高电平(输入状态)
//接收数据左移1位
if(HD7279_DAT)ch+=1;
//接收1位数据
//接收完毕,DATA端重新置成低电平(输出状态)
returnch;
//*****让第No(0到5)位LED闪烁*****//
voidFlashLED(unsignedcharNo)
unsignedchari;
Send7279Byte(0x88);
//发闪烁指令
i=0x01;
while(No)//将1移到第No位
i=i<
No--;
Send7279Byte(~i);
//0闪烁、1不闪烁
NOSELECT7279;
}
//******HD7279A左移命令*****//
voidMoveLeft(void)
Send7279Byte(0xA1);
//发左移指令
//******采用不译码方式显示时数字0到F的段码******//
unsignedcharcodeBdSeg[]={
0x7e,0x30,0x6d,0x79,//0123
0x33,0x5b,0x5f,0x70,//4567
0x7f,0x7b,0x77,0x1f,//89ab
0x4e,0x3d,0x4f,0x47,//cdef
0x00,0x01};
//*显示指针DispBuf所指6个单元数据,点亮第ShowDot(1到6)个LED的小数点*//
voidDispLED(unsignedchar*DispBuf,unsignedcharShowDot)
chari,ch;
ShowDot--;
6;
ch=DispBuf[i];
//取一字符
if((ch>
='
a'
)&
&
(ch<
f'
))//转换成数字
{
ch-='
;
ch+=0xa;
}
A'
F'
))
Send7279Byte(0x90+5-i);
//用不译码方式显示在第i位
if(ch=='
'
)//发送不译码方式显示命令的第2字节
Send7279Byte(0x00);
if(ch=='
-'
)
Send7279Byte(0x01);
else
{
if(ShowDot==i)//查表显示,同时点亮小数点
Send7279Byte(0x80|BdSeg[ch&
0x0f]);
else
Send7279Byte(BdSeg[ch&
}
//置CS高电平
//*****读取按键值*****//
unsignedcharGetKeyValue(void)
unsignedcharKeyValue;
if(CPT1CN&
0x40)return-1;
//if(P17==1)return-1;
//无键按下
Send7279Byte(0x15);
//发读键盘命令
KeyValue=Receive7279Byte();
returnKeyValue;
//***等待按键释放,用C8051F020的比较器硬件检测,也可以用软件延时实现***//
voidWaitKeyOff(void)
(CPT1CN&
0x40));
//*****显示任意长整型数据*****//
voidDispValue(unsignedlongxx)
unsignedcharbuf[6];
buf[0]=(xx%1000000)/100000;
//最高位
buf[1]=(xx%100000)/10000;
buf[2]=(xx%10000)/1000;
buf[3]=(xx%1000)/100;
buf[4]=(xx%100)/10;
buf[5]=(xx%10);
//最低位
DispLED(buf,0);
//调用显示函数,所有小数点都不点亮
//**从键盘读取6位数据,用于存储时间,格式是HHMMSS,所读数据转换成长整型**//
unsignedlongInputNum(void)
unsignedlongNum=0;
unsignedchari=0,KeyValue;
DispLED("
-"
0);
//输入提示
FlashLED(0);
//第一位闪烁
Delay1s
(1);
while
(1)
KeyValue=GetKeyValue();
if(i==6)//6位数据输入完,返回
FlashLED(8);
//关闪烁
returnNum;
if((KeyValue>
=0)&
(KeyValue<
=9))//只接收十进制的0到9
i++;
Send7279Byte(0xC8);
//发送键码值,按方式1译码下载显示
Send7279Byte(KeyValue);
MoveLeft();
//显示并左移一位,仍使低位显示并闪烁。
Send7279Byte(0x90);
Send7279Byte(0x01);
NOSELECT7279;
WaitKeyOff();
Num*=10;
//转换成十进制
Num+=KeyValue;
Delay1ms(500);
}
voidDispTime(void)
Send7279Byte(0x85);
//在最高位(第5位)LED显示小时的高位
Send7279Byte(HourH);
Send7279Byte(0x84);
//在第4位LED显示小时的低位
Send7279Byte(HourL);
Send7279Byte(0x83);
//在第3位LED显示分钟的高位
Send7279Byte(MinuteH);
Send7279Byte(0x82);
//在第2位LED显示分钟的低位
Send7279Byte(MinuteL);
Send7279Byte(0x81);
//在第1位LED显示秒钟的高位
Send7279Byte(SecondH);
Send7279Byte(0x80);
//在第0位LED显示秒钟的低位
Send7279Byte(SecondL);
voidmDispTime(void)
Send7279Byte(mHourH);
Send7279Byte(mHourL);
Send7279Byte(mMinuteH);
Send7279Byte(mMinuteL);
Send7279Byte(mSecondH);
Send7279Byte(mSecondL);
voidset_time()
unsignedlongCurrentTime=0;
do{//从键盘输入时间,格式HHMMSS
CurrentTime=InputNum();
DispValue(CurrentTime);
NowTime[0]=(unsignedchar)((CurrentTime/100000)<
4);
//时
CurrentTime=CurrentTime%100000;
NowTime[0]=NowTime[0]|(CurrentTime/10000);
CurrentTime=CurrentTime%10000;
NowTime[1]=(unsignedchar)((CurrentTime/1000)<
//分
CurrentTime=CurrentTime%1000;
NowTime[1]=NowTime[1]|(CurrentTime/100);
CurrentTime=CurrentTime%100;
NowTime[2]=(unsignedchar)((CurrentTime/10)<
//秒
CurrentTime=CurrentTime%10;
NowTime[2]=NowTime[2]|CurrentTime;
}while((NowTime[0]>
0x24)|(NowTime[1]>
0x59)|(NowTime[2]>
0x59));
HourH=NowTime[0]/16;
//转换成10进制
HourL=NowTime[0]%16;
MinuteH=NowTime[1]/16;
MinuteL=NowTime[1]%16;
SecondH=NowTime[2]/16;
SecondL=NowTime[2]%16;
unsignedlongset_InputNum(void)
intc=0;
while
(1)
if(SecondL>
9){SecondH++,SecondL=0;
if(SecondH>
5){SecondH=0,MinuteL++;
if(MinuteL>
9){MinuteH++,MinuteL=0;
if(MinuteH>
5){MinuteH=0,HourL++;
if(HourL>
9){HourH++;
HourL=0;
if(HourH>
2)HourH=0;
if((HourH==2)&
(HourL>
3)){HourH=0;
c++;
Delay1ms(500);
if(c%2==0)SecondL++;
voidset_ring()
CurrentTime=set_InputNum();
setHourH=NowTime[0]/16;
setHourL=NowTime[0]%16;
setMinuteH=NowTime[1]/16;
setMinuteL=NowTime[1]%16;
setSecondH=NowTime[2]/16;
setSecondL=NowTime[2]%16;
voidm()
unsignedcharcontrol_keyvalue;
intma=0;
inta=1;
mHourH=NowTime[0]/16;
mHourL=NowTime[0]%16;
mMinuteH=NowTime[1]/16;
mMinuteL=NowTime[1]%16;
mSecondH=NowTime[2]/16;
mSecondL=NowTime[2]%16;
ma++;
if(ma%5==0)
mSecondL++;
if(mSecondL>
9){mSecondH++,mSecondL=0;
if(mSecondH>
5){mSecondH=0,mMinuteL++;
if(mMinuteL>
9){mMinuteH++,mMinuteL=0;
if(mMinuteH>
5){mMinuteH=0,mHourL++;
if(mHourL>
9){mHourH++;
mHourL=0;
if(mHourH>
2)mHourH=0;
if((mHourH==2)&
(mHourL>
3)){mHourH=0;
control_keyvalue=GetKeyValue();
if(control_keyvalue==14)break;
if(control_keyvalue==10)a=-a;
if(a==-1&
ma%5==0)mSec
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- c8051f020 单片机 数字 时钟