led矩阵实验的问题/2020-03-20

//实验未实现，主函数的for循环只在内层，导致无法选在行
#include <reg51.h>
#include <intrins.h>
sbit ser=P3^4;//595芯片数据位
sbit rck=P3^5;//上升沿发送
sbit sck=P3^6;//上升沿移位
char h[]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};//行，共阴极
char l[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//列

void delay(int i)
{
    while(i--);
}

void fs (unsigned char dat)
{
    unsigned char a;
    sck=0;
    rck=0;
    for(a=0;a<8;a++)
    {
        ser=dat>>7;
        dat<<=1;

        sck=1;
        _nop_();
        _nop_();
        sck=0;  
    }

    rck=1;
    _nop_();
    _nop_();
    rck=0;
}
int main()
{
    int i,j;
    P0=0XFF;//消隐
    while(1)
    {
        for(i=0;i<8;i++)//外层，行选择
        {   
            for(j=0;j<8;j++)//内层，列选择
            {   
                fs(h[i]);
                P0=l[j];    
                delay(5000);//实验现象只在内层
            }
        }
        if(i>=8)
        {
            i=0;
        }
    }
    return 0;
}

解决方案：

#include <reg51.h>
#include <intrins.h>
#define ground P0
sbit ser=P3^4;
sbit rck=P3^5;
sbit sck=P3^6;
unsigned char code l[8]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//加入code是为了分配内存
unsigned char code h[8][8]={

{0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80}, // 0   1000 0000

{0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40}, // 1

{0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20}, // 2

{0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10}, //  3

{0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08}, // 4

{0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x04}, // 5

{0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02}, //  6

{0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01},  //7


} ;

void delay(int i)
{
    while(i--);
}

void fs (unsigned char dat)
{
    unsigned char a;
    sck=0;
    rck=0;
    for(a=0;a<8;a++)
    {
        ser=dat>>7;
        dat<<=1;

        sck=1;
        _nop_();
        _nop_();
        sck=0;  
    }

    rck=1;
    _nop_();
    _nop_();
    rck=0;
}
int main()
{
    int i,j,k=0;
    while(1)
    {
        for(j=0;j<8;j++)  
        {
            fs(0x00);     //消隐
            ground=l[j];  //0x7f 0xbf
            fs(h[k][j]);  
            delay(50000);
        }   
        k++;
        if(k==8)
        {
            k=0;
        }
    }
    return 0;
}

分析上下程序：1.第一个程序已经修改正确，可以完成任务需求，错因为将595芯片管脚定义错误
2.附上595芯片图纸