Arduino 8x8 LED矩阵不会关闭

时间:2013-10-03 13:39:13

标签: arduino led

所以我正在学习如何使用arduino控制8x8 LED矩阵,但由于某些原因,我的代码无效。我有8行(每个都连接到它自己的引脚,从12 - 5)和4列(每个都有它自己的引脚,引脚0-3)工作。我想用我的LED做一种蛇的设计,所以它对角移动。代码工作,然后我决定添加两行代码(我现在删除),它仍然无法正常工作。所发生的事情是所有的LED都会永久点亮,而不是一次点亮。

编辑:我知道使用延迟通常不好,以及我应该使用开关盒的事实,但我认为这很简单,不必担心它。

以下是代码:

int pinnum = 13;
int lastpin = 0;
int col = 0;
int k;

void setup() {  //runs once
//  initialize pins as outputs
  for(int pinnum; pinnum >= lastpin; pinnum--) 
  {
    pinMode(pinnum, OUTPUT);
  }
  for(int i = 5; i <= 13; i++) //starts with all of them off
  {
    digitalWrite(i,LOW);
  }
  for(int i = 0; i <= 4; i++) //starts with all of them off
  {
    digitalWrite(i, HIGH);
  }

}//   END SETUP

void loop() {

 pinon(12);
 togglecol();
 delay(1000);

 pinon(11);
togglecol();
 delay(1000);

 pinon(10);
 togglecol();
 delay(1000);

 pinon(9);
 togglecol();
 delay(1000);

 pinon(8);
 togglecol();
 delay(1000);

 pinon(7);
 togglecol();
 delay(1000);

 pinon(6);
 togglecol();
 delay(1000);

 pinon(5);
 togglecol();
 delay(1000);
}

void togglecol() 
{
 if(col % 4 == 1) //column = 1, pin 3
 {
  digitalWrite(0, HIGH);
  digitalWrite(1, HIGH);
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW);
 }
 else if(col % 4 == 2) //COLUMN = 2, PIN 2
 {
  digitalWrite(0, HIGH); 
  digitalWrite(1, HIGH);
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
 }
 else if(col % 4 == 3) //COLUMN = 3, PIN 1
 {
  digitalWrite(0, HIGH); 
  digitalWrite(1, LOW);
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
 }
 else if(col % 4 == 0) //  COLUMN 3, PIN 0
 {
  digitalWrite(0, LOW); 
  digitalWrite(1, HIGH);
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
 }
 col++;
} //END TOGGLECOL



void pinon(int pin)
{
  for(k = 5; k <= 13; k++)  //turning all rows off
  {
    digitalWrite(k, LOW);
  }
    digitalWrite(pin, HIGH); //activating correct row again
}//END PINON`

1 个答案:

答案 0 :(得分:1)

所以我认为至少有一个错误就在这里

void setup() {  //runs once
//  initialize pins as outputs
  for(int pinnum; pinnum >= lastpin; pinnum--) 
  {
    pinMode(pinnum, OUTPUT);
  }

在此之上设置pinnum = 13然后在你的for循环中你说for(int pinnum...

这会将pinnum重新初始化为0,因此您的for循环不会显示出来。

你可以在http://www.compileonline.com/compile_cpp_online.php

测试这个词

只需复制并粘贴以下内容并点击编译即可查看差异

//Working for loop

#include <iostream>

using namespace std;

int main()
{
   cout << "Hello World" << endl; 
   int a = 10;

   for(a; a>0; a--){
      cout << a << endl;       
   }
   return 0;
}

然后尝试

//For loop like yours
#include <iostream>

using namespace std;

int main()
{
   cout << "Hello World" << endl; 
   int a = 10;

   for(int a; a>0; a--){
      cout << a << endl;           
   }
   return 0;
}