数码管: 基于STC89C52的数码管设计详解

时间：11-22 来源：互联网点击：

流水灯从上至下移动，当数码管上数减到停止时，实验板上流水灯也停止然后全部开始闪烁，3秒后（用T0定时）流水灯全部关闭、数码管上显示出“HELLO”。到此保持住
#include
#include

#define uint unsigned int
#define uchar unsigned char

sbit dula = P2 ^ 6;
sbit wela = P2 ^ 7;

uchar code table[] = {
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,
0x76,0x79,0x38,0x3f,0
};

uchar temp, t0, t1, bai, shi, ge, flag, flag1;
uint shu;

void init();
void display(uchar, uchar, uchar, uchar, uchar, uchar);
void delayms(uint);

void main()
{
init();
while (1)
{
if (flag1 != 1)
display(7,6,5,bai,shi,ge);
else
display(16,17,18,18,19,20);
}
}

void init()
{
shu = 432;
temp = 0xfe;
P1 = temp;
TMOD = 0x11;
TH0 = (65536 - 50000) / 256;
TL0 = (65536 - 50000) % 256;
TH1 = (65536 - 50000) / 256;
TL1 = (65536 - 50000) % 256;
EA = 1;
ET0 = 1;
ET1 = 1;
TR0 = 1;

TR1 = 1;
}

void T0_timer() interrupt 1
{
TH0 = (65536 - 50000) / 256;
TL0 = (65536 - 50000) % 256;
t0++;
if (flag != 1)
{
if (t0 == 10)
{
t0 = 1;
temp = _crol_(temp,1);
P1 = temp;
}
}
else
{
if (t0 % 4 == 0)
{
P1 = ~P1;
}
if (t0 == 60)
{
TR0 = 0;
P1 = 0xff;
flag1 = 1;
}
}
}

void T1_timer() interrupt 3
{
TH1 = (65536 - 50000) / 256;
TL1 = (65536 - 50000) % 256;
t1++;
if (t1 == 2)
{
t1 = 0;
shu--;
bai = shu / 100;
shi = shu % 100 / 10;
ge = shu % 10;
if (shu == 398)
{
TR0 = 0;
TH0 = (65536 - 50000) / 256;
TL0 = (65536 - 50000) % 256;
TR0 = 1;
flag = 1;
t0 = 0;
P1 = 0xff;
TR1 = 0;
}
}
}

void display(uchar aa, uchar bb, uchar cc, uchar bai, uchar shi, uchar ge)
{
dula = 1;
P0 = table[aa];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
delayms(1);

dula = 1;
P0 = table[bb];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfd;
wela = 0;
delayms(1);

dula = 1;
P0 = table[cc];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfb;
wela = 0;
delayms(1);

dula = 1;
P0 = table[bai];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xf7;
wela = 0;
delayms(1);

dula = 1;
P0 = table[shi];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xef;
wela = 0;
delayms(1);

dula = 1;
P0 = table[ge];

dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xdf;
wela = 0;
delayms(1);
}

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