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| /\*-------------------------------
--------------------------------\*/
#include <STC89C5xRC.H>
unsigned char num[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; //数字0~9
unsigned char ctr[]={0xfa,0xf5}; //0xfa(P3\_0和P3\_2为0,即高位有效)0xf5(P3\_1和P3\_3为0,即低位有效)
unsigned char disEW[2]; //记录东西向高低位数值
unsigned char disSN[2]; //记录南北向高低位数值
unsigned char v;
unsigned char cnt_ctr;
unsigned int scdEW,scdSN;
unsigned int cntSN,cntEW;
unsigned char cntP3_4,cntP3_5,cntP3_6;
unsigned int cnt_num,cnt_key,cnt_flash,keyMemory;
int greenEW = 20,yellowEW = 3,greenSN = 25,yellowSN = 3;
//正常显示秒数
void display(void)
{
cnt_num++;
if(cnt_ctr == 10)
{
cnt_ctr = 0;
P3 = 0xff;
P3 = ctr[v];
P2 = num[disEW[v]]; //显示东西方向秒数
P0 = num[disSN[v]]; //显示南北方向秒数
if(v++ == 1)
{
v = 0;
}
}
}
//闪烁显示秒数
void dspFlash(void)
{
cnt_flash++;
if(cnt_flash < 660)
{
P3 = 0xff;
//数码管灭
}
else
{
if(cnt_flash == 1333)
//数码管亮 1333=4000/3 即1秒闪3次
{
cnt_flash = 0;
}
if(cnt_ctr == 25)
{
cnt_ctr = 0;
P3 = 0xff;
P3 = ctr[v];
switch(cntP3_4)
{
case 1:
P30 = 1;
P31 = 1;
P2 = num[disEW[v]];
break;
case 2:
P30 = 1;
P31 = 1;
P2 = num[disEW[v]];
break;
case 3:
P32 = 1;
P33 = 1;
P0 = num[disSN[v]];;
break;
case 4:
P32 = 1;
P33 = 1;
P0 = num[disSN[v]];
break;
}
if(v++ == 1)
{
v = 0;
}
}
}
}
//T0中断
void t0(void) interrupt 1
{
cnt_ctr++;
if(cntP3_4 == 0)
{
display(); //正常显示秒数
}
if(cntP3_4 != 0)
{
dspFlash(); //闪烁显示秒数
}
if(cnt_num == 4000)
{
cnt_num = 0;
if(scdEW-- == 0)
{
cntEW++; //东西向秒数减至0,标志位加1
}
if(scdSN-- == 0)
{
cntSN++; //南北向秒数减至0,标志位加1
}
}
switch(cntEW)
{
case 1:
scdEW = yellowEW; //东西向黄灯亮,显示黄灯秒数
P13 = 1;
P14 = 0;
P15 = 1;
cntEW++; //避免程序到此阻塞,故将其至为2
break;
case 3: //避免cntEW为2
scdEW = greenSN + yellowSN + 1; //东西向红灯亮,显示红灯秒数
P13 = 1;
P14 = 1;
P15 = 0;
cntEW++; //避免程序到此阻塞,故将其至为4
break;
case 5: //避免cntEW为4
scdEW = greenEW; //东西向绿灯亮,显示绿灯秒数
P13 = 0;
P14 = 1;
P15 = 1;
cntEW = 0;
break;
}
switch(cntSN)
{
case 1:
scdSN = greenSN; //南北向绿灯亮,显示绿灯秒数
P10 = 0;
P11 = 1;
P12 = 1;
cntSN++; //避免程序到此阻塞,故将其至为2
break;
case 3: //避免cntSN为2
scdSN = yellowSN; //南北向黄灯亮,显示黄灯秒数
P10 = 1;
P11 = 0;
P12 = 1;
cntSN++; //避免程序到此阻塞,故将其至为4
break;
case 5: //避免cntSN为4
scdSN = greenEW + yellowEW + 1; //南北向红灯亮,显示红灯秒数
P10 = 1;
P11 = 1;
P12 = 0;
cntSN = 0;
break;
}
disEW[0] = scdEW/10;
disEW[1] = scdEW%10;
disSN[0] = scdSN/10;
disSN[1] = scdSN%10;
}
//主函数
void main(void)
{
TMOD = 0x02; //设置定时器0为工作方式2
TH0 = 0x06;
TL0 = 0x06; //初始化8位定时器 (256 - 6)\*40000 = 1s
EA = 1; //总中断允许
ET0 = 1; //T0中断允许
TR0 = 1; //打开T0中断
P1 = 0xf3; //东西向绿灯,南北向红灯
P34 = 1;
scdEW = greenEW; //设置东西向显示秒数
scdSN = greenEW + yellowEW + 1; //设置南北向显示秒数
while(1)
{
}
}
|
