单片机学习（点阵LED及多模块同时实现）

 原理也是动态刷新，横向滚动时，8列为一张图片，总共是30张，用二维数组将这些图片存储起来

#include 

sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;

unsigned char code image[30][8] = {
    {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},  //动画帧1
    {0xFF,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F},  //动画帧2
    {0xFF,0x3F,0x7F,0x7F,0x7F,0x7F,0x7F,0x3F},  //动画帧3
    {0xFF,0x1F,0x3F,0x3F,0x3F,0x3F,0x3F,0x1F},  //动画帧4
    {0xFF,0x0F,0x9F,0x9F,0x9F,0x9F,0x9F,0x0F},  //动画帧5
    {0xFF,0x87,0xCF,0xCF,0xCF,0xCF,0xCF,0x87},  //动画帧6
    {0xFF,0xC3,0xE7,0xE7,0xE7,0xE7,0xE7,0xC3},  //动画帧7
    {0xFF,0xE1,0x73,0x73,0x73,0xF3,0xF3,0xE1},  //动画帧8
    {0xFF,0x70,0x39,0x39,0x39,0x79,0xF9,0xF0},  //动画帧9
    {0xFF,0x38,0x1C,0x1C,0x1C,0x3C,0x7C,0xF8},  //动画帧10
    {0xFF,0x9C,0x0E,0x0E,0x0E,0x1E,0x3E,0x7C},  //动画帧11
    {0xFF,0xCE,0x07,0x07,0x07,0x0F,0x1F,0x3E},  //动画帧12
    {0xFF,0x67,0x03,0x03,0x03,0x07,0x0F,0x9F},  //动画帧13
    {0xFF,0x33,0x01,0x01,0x01,0x03,0x87,0xCF},  //动画帧14
    {0xFF,0x99,0x00,0x00,0x00,0x81,0xC3,0xE7},  //动画帧15
    {0xFF,0xCC,0x80,0x80,0x80,0xC0,0xE1,0xF3},  //动画帧16
    {0xFF,0xE6,0xC0,0xC0,0xC0,0xE0,0xF0,0xF9},  //动画帧17
    {0xFF,0x73,0x60,0x60,0x60,0x70,0x78,0xFC},  //动画帧18
    {0xFF,0x39,0x30,0x30,0x30,0x38,0x3C,0x7E},  //动画帧19
    {0xFF,0x9C,0x98,0x98,0x98,0x9C,0x1E,0x3F},  //动画帧20
    {0xFF,0xCE,0xCC,0xCC,0xCC,0xCE,0x0F,0x1F},  //动画帧21
    {0xFF,0x67,0x66,0x66,0x66,0x67,0x07,0x0F},  //动画帧22
    {0xFF,0x33,0x33,0x33,0x33,0x33,0x03,0x87},  //动画帧23
    {0xFF,0x99,0x99,0x99,0x99,0x99,0x81,0xC3},  //动画帧24
    {0xFF,0xCC,0xCC,0xCC,0xCC,0xCC,0xC0,0xE1},  //动画帧25
    {0xFF,0xE6,0xE6,0xE6,0xE6,0xE6,0xE0,0xF0},  //动画帧26
    {0xFF,0xF3,0xF3,0xF3,0xF3,0xF3,0xF0,0xF8},  //动画帧27
    {0xFF,0xF9,0xF9,0xF9,0xF9,0xF9,0xF8,0xFC},  //动画帧28
    {0xFF,0xFC,0xFC,0xFC,0xFC,0xFC,0xFC,0xFE},  //动画帧29
    {0xFF,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF}   //动画帧30
};

void main()
{
    EA = 1;       //使能总中断
    ENLED = 0;    //使能U4，选择LED点阵
    ADDR3 = 0;
    TMOD = 0x01;  //设置T0为模式1
    TH0  = 0xFC;  //为T0赋初值0xFC67，定时1ms
    TL0  = 0x67;
    ET0  = 1;     //使能T0中断
    TR0  = 1;     //启动T0
    while (1);
}

void InterruptTimer0() interrupt 1
{
    static unsigned char i = 0;  //动态扫描的索引
    static unsigned char tmr = 0;  //250ms软件定时器
    static unsigned char index = 0;  //图片刷新索引

    TH0 = 0xFC;  //重新加载初值
    TL0 = 0x67;
    //以下代码完成LED点阵动态扫描刷新
    P0 = 0xFF;   //显示消隐
    switch (i)
    {
        case 0: ADDR2=0; ADDR1=0; ADDR0=0; i++; P0=image[index][0]; break;
        case 1: ADDR2=0; ADDR1=0; ADDR0=1; i++; P0=image[index][1]; break;
        case 2: ADDR2=0; ADDR1=1; ADDR0=0; i++; P0=image[index][2]; break;
        case 3: ADDR2=0; ADDR1=1; ADDR0=1; i++; P0=image[index][3]; break;
        case 4: ADDR2=1; ADDR1=0; ADDR0=0; i++; P0=image[index][4]; break;
        case 5: ADDR2=1; ADDR1=0; ADDR0=1; i++; P0=image[index][5]; break;
        case 6: ADDR2=1; ADDR1=1; ADDR0=0; i++; P0=image[index][6]; break;
        case 7: ADDR2=1; ADDR1=1; ADDR0=1; i=0; P0=image[index][7]; break;
        default: break;
    }
    //以下代码完成每250ms改变一帧图像
    tmr++;
    if (tmr >= 250)  //达到250ms时改变一次图片索引
    {
        tmr = 0;
        index++;
        if (index >= 30)  //图片索引达到30后归零
        {
            index = 0;
        }
    }
}

（变量前加static代表变量只初始化一次）

#include 

sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;

void main()
{
    EA = 1;       //使能总中断
    ENLED = 0;    //使能LED
    TMOD = 0x01;  //设置T0为模式1
    TH0  = 0xFC;  //为T0赋初值0xFC67，定时1ms
    TL0  = 0x67;
    ET0  = 1;     //使能T0中断
    TR0  = 1;     //启动T0
    while (1);
}

void InterruptTimer0() interrupt 1
{
    static unsigned char i = 0;  //动态扫描的索引

    TH0 = 0xFC;  //重新加载初值
    TL0 = 0x67;
    //以下代码完成LED点阵动态扫描刷新
    P0 = 0xFF;   //显示消隐
    switch (i)
    {
        //点阵LED部分
        case 0: ADDR3 = 0; ADDR2=0; ADDR1=0; ADDR0=0; i++; P0=0; break;
        case 1: ADDR3 = 0; ADDR2=0; ADDR1=0; ADDR0=1; i++; P0=0; break;
        case 2: ADDR3 = 0; ADDR2=0; ADDR1=1; ADDR0=0; i++; P0=0; break;
        case 3: ADDR3 = 0; ADDR2=0; ADDR1=1; ADDR0=1; i++; P0=0; break;
        case 4: ADDR3 = 0; ADDR2=1; ADDR1=0; ADDR0=0; i++; P0=0; break;
        case 5: ADDR3 = 0; ADDR2=1; ADDR1=0; ADDR0=1; i++; P0=0; break;
        case 6: ADDR3 = 0; ADDR2=1; ADDR1=1; ADDR0=0; i++; P0=0; break;
        case 7: ADDR3 = 0; ADDR2=1; ADDR1=1; ADDR0=1; i++; P0=0; break;
        //数码管部分
        case 8:  ADDR3 = 1; ADDR2=0; ADDR1=0; ADDR0=0; i++; P0=0; break;
        case 9:  ADDR3 = 1; ADDR2=0; ADDR1=0; ADDR0=1; i++; P0=0; break;
        case 10: ADDR3 = 1; ADDR2=0; ADDR1=1; ADDR0=0; i++; P0=0; break;
        case 11: ADDR3 = 1; ADDR2=0; ADDR1=1; ADDR0=1; i++; P0=0; break;
        case 12: ADDR3 = 1; ADDR2=1; ADDR1=0; ADDR0=0; i++; P0=0; break;
        case 13: ADDR3 = 1; ADDR2=1; ADDR1=0; ADDR0=1; i++; P0=0; break;
        //独立LED部分
        case 14: ADDR3 = 1; ADDR2=1; ADDR1=1; ADDR0=0; i=0; P0=0; break;
        default: break;
    }
}

 需要在动态刷新里加上addr3的改变。