在8x8点阵屏上循环显示数字0~9
使用的是普中科技的开发板,一个点阵显示模块是由8x8共64个LED按照共阴或共阳的连接方式组成。
每行的8个LED的负极连接一起,构成8根行线,每列的8个LED的正极连接一起,构成8根列线,就是共阴极接法。
每行的8个LED的正极连接一起,构成8根行线,每列的8个LED的负极连接一起,构成8根列线,就是共阳极接法。
若要点亮8x8点阵屏给每个LED连接到IO口是不够的,所以要使用到74Hc595芯片,只需要连接到AT89C52芯片上3个IO口即可点亮8x8LED点阵屏。
代码
循环数字0~9
#include <reg51.h>
#include <intrins.h>
typedef unsigned char u8;
typedef unsigned int u16;
sbit SRCLK=P3^6;
sbit RCLK=P3^5;
sbit SER=P3^4;
u8 code ledduan[][8]={{0x00,0x00,0x3e,0x41,0x41,0x41,0x3e,0x00}, //0
{0x00,0x00,0x00,0x21,0x7f,0x01,0x00,0x00}, //1
{0x00,0x00,0x27,0x45,0x45,0x45,0x39,0x00}, //2
{0x00,0x00,0x2a,0x49,0x49,0x49,0x36,0x00}, //3
{0x00,0x00,0x0c,0x14,0x24,0x7f,0x04,0x00}, //4
{0x00,0x00,0x72,0x51,0x51,0x51,0x4e,0x00}, //5
{0x00,0x00,0x3e,0x49,0x49,0x49,0x26,0x00}, //6
{0x00,0x00,0x40,0x40,0x4f,0x50,0x60,0x00}, //7
{0x00,0x00,0x36,0x49,0x49,0x49,0x36,0x00}, //8
{0x00,0x00,0x32,0x49,0x49,0x49,0x3e,0x00},}; //9
u8 ledwei[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
void delay(u16 i)
{
while(i--);
}
void Hc595SendByte(u8 dat)
{
u8 i;
SRCLK=0;
RCLK=0;
for(i=0;i<8;i++)
{
SER=dat>>7;
dat<<=1;
SRCLK=1;
_nop_();
_nop_();
SRCLK=0;
}
RCLK=1;
_nop_();
_nop_();
RCLK=0;
}
int main()
{
u16 i,j,k;
while(1)
{
for(j=0;j<80;j++) //控制数字到下一个数字的速度
{
for(i=0;i<8;i++)
{
P0=ledwei[i];
Hc595SendByte(ledduan[k][i]);
delay(50);
Hc595SendByte(0x00);
}
}
k++; //ldeduan的数组++
if(k>=10) //当k>=10,
{
k=0; //k=0
}
}
}
|