#include<reg51.h>
unsigned int t = 0;
unsigned char cnt = 0;
unsigned char a = 0;
void ConfigTimer0()
{
TMOD = 0x02;
TH0 = 0x9C;
TL0 = 0x9C;
ET0 = 1;
TR0 = 1;
EA = 1;
}
void main()
{
ConfigTimer0();
while(1)
{
switch(a)
{
case 0: P0 = 0xFe; break;
case 1: P0 = 0xFD; break;
case 2: P0 = 0xFB; break;
case 3: P0 = 0xF7; break;
case 4: P0 = 0xEF; break;
case 5: P0 = 0xDF; break;
case 6: P0 = 0xBF; break;
case 7: P0 = 0x7F; break;
default: break;
}
}
}
void interruptTimer0() interrupt 1
{
t++;
if(t >= 10000)
{
t = 0;
a++;
if(a >= 8)
{
a = 0;
}
}
}
2.
#include<reg51.h>
unsigned int t = 0;
unsigned char cnt = 0;
unsigned char a = 0;
void ConfigTimer0()
{
TMOD = 0x02;
TH0 = 0x9C;
TL0 = 0x9C;
ET0 = 1;
TR0 = 1;
EA = 1;
}
void main()
{
ConfigTimer0();
while(1)
{
switch(a)
{
case 0: P0 = 0xE7; break;
case 1: P0 = 0xC3; break;
case 2: P0 = 0x81; break;
case 3: P0 = 0x00; break;
case 4: P0 = 0x18; break;
case 5: P0 = 0x3C; break;
case 6: P0 = 0x7E; break;
case 7: P0 = 0xFF; break;
default: break;
}
}
}
圖還是壹樣的， 我只是壹個大概的仿真，實際的電路， P0 口要加10k的上拉電阻，LEd燈要加 1K的電阻限流
void interruptTimer0() interrupt 1
{
t++;
if(t >= 5000)
{
t = 0;
a++;
if(a >= 8)
{
a = 0;
}
}
}