今天測试数码管LED屏驱动，用某产品的一个共阴极的LED屏，依据电路图做数码管LED屏的检測。

代码写得有些冗长，有好几种驱动的方法，这里仅仅是当中一种最直接的方案，抽出时间要做个更有效率的调用和驱动的方案。

//设置阴极接口

int d1 = 1;

int d2 = 2;

int d3 = 3;

int d4 = 4;

int d5 = 5;

int d6 = 6;

int d7 = 7;

//设置阳极接口

int a = 8;

int b = 9;

int c = 10;

int d = 11;

int e = 12;

int f = 13;

int g = A0;

int h = A1;

void setup()

{

pinMode(d1, OUTPUT);

pinMode(d2, OUTPUT);

pinMode(d3, OUTPUT);

pinMode(d4, OUTPUT);

pinMode(d5, OUTPUT);

pinMode(d6, OUTPUT);

pinMode(d7, OUTPUT);

pinMode(a, OUTPUT);

pinMode(b, OUTPUT);

pinMode(c, OUTPUT);

pinMode(d, OUTPUT);

pinMode(e, OUTPUT);

pinMode(f, OUTPUT);

pinMode(g, OUTPUT);

pinMode(h, OUTPUT);

digitalWrite(a, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(h, LOW);

digitalWrite(d1, HIGH);

digitalWrite(d2, HIGH);

digitalWrite(d3, HIGH);

digitalWrite(d4, HIGH);

digitalWrite(d5, HIGH);

digitalWrite(d6, HIGH);

digitalWrite(d7, HIGH);

}

void loop()

{

//缺水

digitalWrite(d7, LOW);

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

delay(500);

//低水位

digitalWrite(a, LOW);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

delay(500);

//定时关机

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

digitalWrite(g, HIGH);

delay(500);

//温度十位8

digitalWrite(d7, HIGH);

digitalWrite(d1, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(a, HIGH);

delay(300);

digitalWrite(a, LOW);

digitalWrite(b, HIGH);

delay(300);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

delay(300);

digitalWrite(c, LOW);

digitalWrite(d, HIGH);

delay(300);

digitalWrite(d, LOW);

digitalWrite(e, HIGH);

delay(300);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

delay(300);

digitalWrite(f, LOW);

digitalWrite(g, HIGH);

delay(300);

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

delay(300);

//温度个位8

digitalWrite(d1, HIGH);

digitalWrite(d2, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(a, HIGH);

delay(300);

digitalWrite(a, LOW);

digitalWrite(b, HIGH);

delay(300);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

delay(300);

digitalWrite(c, LOW);

digitalWrite(d, HIGH);

delay(300);

digitalWrite(d, LOW);

digitalWrite(e, HIGH);

delay(300);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

delay(300);

digitalWrite(f, LOW);

digitalWrite(g, HIGH);

delay(300);

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

delay(300);

//温符号度

digitalWrite(d2, HIGH);

digitalWrite(a, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(h, HIGH);

digitalWrite(d1, LOW);

delay(500);

//睡眠符号

digitalWrite(d1, HIGH);

digitalWrite(d2, LOW);

delay(500);

//小时十位8

digitalWrite(d2, HIGH);

digitalWrite(d3, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(a, HIGH);

delay(300);

digitalWrite(a, LOW);

digitalWrite(b, HIGH);

delay(300);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

delay(300);

digitalWrite(c, LOW);

digitalWrite(d, HIGH);

delay(300);

digitalWrite(d, LOW);

digitalWrite(e, HIGH);

delay(300);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

delay(300);

digitalWrite(f, LOW);

digitalWrite(g, HIGH);

delay(300);

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

delay(300);

//小时个位8

digitalWrite(d3, HIGH);

digitalWrite(d4, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(h, LOW);

digitalWrite(a, HIGH);

delay(300);

digitalWrite(a, LOW);

digitalWrite(b, HIGH);

delay(300);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

delay(300);

digitalWrite(c, LOW);

digitalWrite(d, HIGH);

delay(300);

digitalWrite(d, LOW);

digitalWrite(e, HIGH);

delay(300);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

delay(300);

digitalWrite(f, LOW);

digitalWrite(g, HIGH);

delay(300);

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

delay(300);

//冒号

digitalWrite(a, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(h, HIGH);

delay(500);

//分钟十位8

digitalWrite(d4, HIGH);

digitalWrite(d5, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(a, HIGH);

delay(300);

digitalWrite(a, LOW);

digitalWrite(b, HIGH);

delay(300);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

delay(300);

digitalWrite(c, LOW);

digitalWrite(d, HIGH);

delay(300);

digitalWrite(d, LOW);

digitalWrite(e, HIGH);

delay(300);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

delay(300);

digitalWrite(f, LOW);

digitalWrite(g, HIGH);

delay(300);

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

delay(300);

//分钟个位8

digitalWrite(d5, HIGH);

digitalWrite(d6, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(a, HIGH);

delay(300);

digitalWrite(a, LOW);

digitalWrite(b, HIGH);

delay(300);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

delay(300);

digitalWrite(c, LOW);

digitalWrite(d, HIGH);

delay(300);

digitalWrite(d, LOW);

digitalWrite(e, HIGH);

delay(300);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

delay(300);

digitalWrite(f, LOW);

digitalWrite(g, HIGH);

delay(300);

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

delay(300);

//全亮

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

digitalWrite(g, HIGH);

digitalWrite(h, HIGH);

digitalWrite(d1, LOW);

digitalWrite(d2, LOW);

digitalWrite(d3, LOW);

digitalWrite(d4, LOW);

digitalWrite(d5, LOW);

digitalWrite(d6, LOW);

digitalWrite(d7, LOW);

delay(500);

//全灭

digitalWrite(a, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(h, LOW);

digitalWrite(d1, HIGH);

digitalWrite(d2, HIGH);

digitalWrite(d3, HIGH);

digitalWrite(d4, HIGH);

digitalWrite(d5, HIGH);

digitalWrite(d6, HIGH);

digitalWrite(d7, HIGH);

delay(500);

}

计划採用机器视觉来检測，自己主动鉴别出断笔，笔段亮度差异较大等质量检验问题。

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