C51学习 之 动态数码管

电路图

动态数码管代码

//以下代码未经过验证
#include <reg52.h>

sbit WELA = P2^7;
sbit DULA = P2^6;
unsigned char count = 0;
unsigned char code_count = 0;
unsigned char code[] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71}；

void init()
{
    WELA = 0;
    DULA = 0;
    P0 = 0x0;
}

void delay(unsigned int value)
{
    while(value--);
}

int main()
{
    init();
    
    while (1) {
        //位选  低电平有效
        WELA = 1;
        P0 = ~(0x1 << count);
        WELA = 0;

        //消影
        P0 = 0x0;
        
        //段选   高电平有效
        DULA = 1;
        P0 = code[code_count];
        DULA = 0;
        
        //消影
        P0 = 0xff;
        
        delay(50000);  //500ms
        
        count++;
        if (count == 8) {
            count = 0;
        }
        code_count++;
        if (code_count == 16) {
            code_count = 0;
        }
    }
}