动态显示字符.c

8×8LED实现汉字显示

#include <reg51.h>
#define uint unsigned int 
#define uchar unsigned char
const unsigned char char_7[8]={0x10,0x38,0x7C,0xFE,0x38,0x38,0x38,0x38};
const unsigned char char_8[32]={ 0x7C,0x48,0x48,0xFF,0x48,0x48,0x7C,0x0,
                                 0x1C,0x30,0x1,0xFF,0x0,0x20,0x18,0x04,
							     0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x02,
                                 0x3E,0x2,0x2,0xFE,0x2,0x2,0x3F,0x00  
								};//中
const unsigned char char_9[32]={ 0x7C,0x48,0x48,0xFF,0x48,0x48,0x7C,0x0,
                                0x04,0x18,0x20,0x0, 0xFF,0x1,0x30,0x1C,
							     0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x02,
                                 0x3E,0x2,0x2,0xFE,0x2,0x2,0x3F,0x00  
								};//中

void delay_ms(uint k)
 { uint i,j;
   for(i=0;i<k;i++)
     for(j=0;j<125;j++);
}   
void display(char row)
{
char i;
for (i=0;i<=8;i++)
{
if (row <= 31)
P2 = char_9[row];
else
P2 = 0;
//P3 = ~(1<<i);
P3=~(0x80>>i);
delay_ms(2);
P3 = 0xFF;
if (++row >= 31 ) row = 0;
}
}
void main(void)
{
char time_counter,i = 0;
P2=0xFF;
P3=0x00;
delay_ms(1000); //全亮一秒
while (1)
{
display(i);
delay_ms(30);
if (++time_counter >= 4)
{
time_counter = 0;
if(++i >= 31) i=0;
}
}
}