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Arduino使用蓝牙控制8×8点阵显示

8×8点阵简介

查看往期文章——Arduino控制8×8点阵显示中的相关介绍

HC-08蓝牙模块

查看往期文章——蓝牙控制一位数码管显示中的相关介绍

连接线路图

使用引脚数量为16个，所以需要占用开发板16个引脚。考虑到使用的开发板只有14个数字引脚，6个模拟引脚，所以这里将模拟引脚做数字引脚使用。使用的数字引脚为编号2 ~ 13，模拟引脚为A0 ~ A3。

连接电路图时为避免线路缠绕，采用按顺序一次连接引脚的方式。点阵1~16引脚分别对应开发板的10，11，12，13，A3，A2，A1，A0，2，3，4，5，6，7，8，9。连接时考虑到保护点阵，在各个引脚进线处增加了电阻。

线路图

编写控制程序

  • 理清引脚-编号关系，列表查看如下：

image.png

|点阵列编号|1|2|3|4|5|6|7|8| |-|-|-|-|-|-|-|-|-|-| |点阵引脚|13|3|4|10|6|11|15|16| |开发板引脚|6|A2|A3|3|12|4|8|9| |点阵行编号|1|2|3|4|5|6|7|8| 点阵引脚 |9|14|8|12|1|7|2||5| 开发板引脚|2|7|10|5|A0|11|A1|13|

因此定义控制点阵列引脚数组：

//Col : 13,3,4,10,6,11,15,16(点阵引脚)
int colPin[]= {6,A2,A3,3,12,4,8,9}; //pin
C++

定义控制点阵行引脚数组：

//Row : 9,14,8,12,1,7,2,5(点阵引脚)
int rowPin[]= {2,7,10,5,A0,11,A1,13}; //pin
C++

编写程序如下：

在setup()中:

  • 启动串口通讯：
  Serial.begin(9600); 
C++
  • 设置所有引脚为输出模式：
for(int i=0;i<8;i++){
    pinMode(colPin[i],OUTPUT);//设置输出
    pinMode(rowPin[i],OUTPUT);//设置输出
  }
C++
  • 调用reset()实现点阵显示清空，reset()定义如下：
void reset(){
  for(int i=0;i<8;i++){
    digitalWrite(colPin[i],LOW);
    digitalWrite(rowPin[i],HIGH);
  }
}
C++

此外，需要定义一些函数：

  • 定义显示函数showChar()，用于使点阵显示相应字符：
void showChar(int data[8][8]){
  for(int i=0;i<100;i++){
    for(int row=0;row<8;row++){
      digitalWrite(rowPin[row],LOW);
      for(int col=0;col<8;col++){
        digitalWrite(colPin[col],data[row][col]);
      }
      delay(1);
      reset();
    }
  }
  delay(1000);
}
C++

所需传入参数为8×8的二维整型数组data；最外层i-for循环100次用于延长单次显示时间，大约持续零点几秒，否则显示时间过短，效果不好；row-for循环中，每次循环首先将该行控制的点阵行通低电平：digitalWrite(rowPin[row],LOW);然后再col-for循环遍历每列，将该列控制的点阵列通data数组相应的电平值：digitalWrite(colPin[col],data[row][col]);

调用示例如下：

//显示数字‘0’
int data[8][8]={
0,0,0,1,1,0,0,0,
0,0,1,0,0,1,0,0,
0,1,0,0,0,0,1,0,
0,1,0,0,0,0,1,0,
0,1,0,0,0,0,1,0,
0,1,0,0,0,0,1,0,
0,0,1,0,0,1,0,0,
0,0,0,1,1,0,0,0
};
showChar(data);
C++
  • 读取蓝牙串口传输的数据并显示：
void loop(){
  if(Serial.available()>0){
    char c = Serial.read();
    dealChar(c);
    Serial.print("char value:");
    Serial.println(c);
  }
}
C++

其中dealChar()为定义的根据传入字符来控制具体显示的函数，详见下文。

案例

编写程序依次显示数字H，e，l，l，o，A，r，d，u，i，n，o，!，0，1，2，3，4，5，6，7，8，9和爱心，并实现可由蓝牙进行控制：

//Col : 13,3,4,10,6,11,15,16(点阵引脚)
const int colPin[]= {6,A2,A3,3,12,4,8,9}; //pin
//Row : 9,14,8,12,1,7,2,5(点阵引脚)
const int rowPin[]= {2,7,10,5,A0,11,A1,13}; //pin

const int PROGMEM data_0[8][8]=
      {
        0,0,0,1,1,0,0,0,
        0,0,1,0,0,1,0,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,0,1,0,0,1,0,0,
        0,0,0,1,1,0,0,0
       };
       
const int PROGMEM data_1[8][8]=
      {
        0,0,0,1,1,0,0,0,
        0,0,1,0,1,0,0,0,
        0,0,0,0,1,0,0,0,
        0,0,0,0,1,0,0,0,
        0,0,0,0,1,0,0,0,
        0,0,0,0,1,0,0,0,
        0,0,0,0,1,0,0,0,
        0,1,1,1,1,1,1,0
       };
const int PROGMEM data_2[8][8]=
      {
        0,0,1,1,1,0,0,0,
        0,1,0,0,0,1,0,0,
        0,1,0,0,0,0,1,0,
        0,0,0,0,0,0,1,0,
        0,0,0,0,0,1,0,0,
        0,0,0,0,1,0,0,0,
        0,0,1,1,0,0,0,0,
        0,1,1,1,1,1,1,0
       };
const int PROGMEM data_3[8][8]=
      {
        0,0,1,1,1,1,0,0,
        0,1,0,0,0,0,1,0,
        0,0,0,0,0,0,1,0,
        0,0,0,0,0,1,0,0,
        0,0,1,1,1,0,0,0,
        0,0,0,0,0,1,0,0,
        0,1,0,0,0,0,1,0,
        0,0,1,1,1,1,0,0
       };
const int PROGMEM data_4[8][8]=
      {
        0,0,0,0,1,0,0,0,
        0,0,0,1,1,0,0,0,
        0,0,1,0,1,0,0,0,
        0,1,0,0,1,0,0,0,
        1,1,1,1,1,1,1,1,
        0,0,0,0,1,0,0,0,
        0,0,0,0,1,0,0,0,
        0,0,0,0,1,0,0,0
       };
const int PROGMEM data_5[8][8]=
    {
        0,1,1,1,1,1,1,0,
        0,1,0,0,0,0,0,0,
        0,1,0,0,0,0,0,0,
        0,1,1,1,1,1,0,0,
        0,0,0,0,0,0,1,0,
        0,0,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,0,1,1,1,1,0,0
       };
const int PROGMEM data_6[8][8]=
      {
        0,0,1,1,1,1,0,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,0,0,
        0,1,0,1,1,1,0,0,
        0,1,1,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,0,1,1,1,1,0,0
       };
const int PROGMEM data_7[8][8]=
      {
        0,0,1,1,1,1,0,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,0,0,0,0,0,1,0,
        0,0,0,0,0,0,1,0,
        0,0,0,0,0,1,0,0,
        0,0,0,0,1,0,0,0,
        0,0,0,1,0,0,0,0
       };
const int PROGMEM data_8[8][8]=
      {
        0,0,0,1,1,0,0,0,
        0,0,1,0,0,1,0,0,
        0,1,0,0,0,0,1,0,
        0,0,1,0,0,1,0,0,
        0,0,0,1,1,0,0,0,
        0,0,1,0,0,1,0,0,
        0,1,0,0,0,0,1,0,
        0,0,1,1,1,1,0,0
       };
const int PROGMEM data_9[8][8]=
      {
        0,0,1,1,1,1,0,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,1,1,1,1,1,0,
        0,0,0,0,0,0,1,0,
        0,0,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,0,1,1,1,1,0,0
       };
const int PROGMEM data_A[8][8]=
      {
        0,0,0,1,1,0,0,0,
        0,0,0,1,1,0,0,0,
        0,0,1,0,0,1,0,0,
        0,0,1,1,1,1,0,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        1,0,0,0,0,0,0,1,
        1,0,0,0,0,0,0,1
       };
const int PROGMEM data_a[8][8]=
      {
        0,0,1,1,1,1,1,0,
        0,0,0,0,0,0,0,1,
        0,0,0,0,0,0,0,1,
        0,1,1,1,1,1,1,1,
        1,0,0,0,0,0,0,1,
        1,0,0,0,0,0,0,1,
        1,0,0,0,0,0,1,1,
        0,1,1,1,1,1,0,1
       };
const int PROGMEM data_b[8][8]=
      {
        0,1,0,0,0,0,0,0,
        0,1,0,0,0,0,0,0,
        0,1,0,0,0,0,0,0,
        0,1,0,1,1,1,0,0,
        0,1,1,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,1,0,0,
        0,1,1,1,1,0,0,0
       };
const int PROGMEM data_c[8][8]=
      {
        0,0,0,0,0,0,0,0,
        0,0,1,1,1,1,0,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,0,0,
        0,1,0,0,0,0,0,0,
        0,1,0,0,0,0,1,0,
        0,0,1,1,1,1,0,0,
        0,0,0,0,0,0,0,0
       };
const int PROGMEM data_d[8][8]=
      {
        0,0,0,0,0,0,1,0,
        0,0,0,0,0,0,1,0,
        0,0,0,0,0,0,1,0,
        0,1,1,1,1,0,1,0,
        1,0,0,0,0,1,1,0,
        1,0,0,0,0,0,1,0,
        1,0,0,0,0,1,1,0,
        0,1,1,1,1,0,0,1
       };
const int PROGMEM data_e[8][8]=
      {
        0,0,0,0,0,0,0,0,
        0,0,0,1,1,1,0,0,
        0,0,1,0,0,0,1,0,
        0,1,1,1,1,1,0,0,
        0,1,0,0,0,0,0,0,
        0,1,0,0,0,0,1,0,
        0,0,1,1,1,1,0,0,
        0,0,0,0,0,0,0,0
       };
const int PROGMEM data_H[8][8]=
      {
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,1,1,1,1,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0
       };
const int PROGMEM data_h[8][8]=
      {
        0,1,0,0,0,0,0,0,
        0,1,0,0,0,0,0,0,
        0,1,0,0,0,0,0,0,
        0,1,0,1,1,0,0,0,
        0,1,1,0,0,1,0,0,
        0,1,0,0,0,1,0,0,
        0,1,0,0,0,1,0,0,
        0,1,0,0,0,0,1,0
       };
const int PROGMEM data_i[8][8]=
      {
        0,0,0,0,1,0,0,0,
        0,0,0,0,0,0,0,0,
        0,0,0,1,1,0,0,0,
        0,0,1,0,1,0,0,0,
        0,0,0,0,1,0,0,0,
        0,0,0,0,1,0,0,0,
        0,0,1,1,1,1,1,0,
        0,0,0,0,0,0,0,0
       };
const int PROGMEM data_l[8][8]=
      {
        0,0,0,1,0,0,0,0,
        0,0,1,1,0,0,0,0,
        0,0,0,1,0,0,0,0,
        0,0,0,1,0,0,0,0,
        0,0,0,1,0,0,0,0,
        0,0,0,1,0,0,0,0,
        0,0,0,1,0,1,0,0,
        0,0,0,1,1,0,0,0
       };
const int PROGMEM data_n[8][8]=
      {
        0,0,0,0,0,0,0,0,
        0,1,0,1,1,1,0,0,
        0,1,1,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,0,0,0,0,0,0,0
       };
const int PROGMEM data_o[8][8]=
      {
        0,0,0,0,0,0,0,0,
        0,0,1,1,1,1,0,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,0,1,1,1,1,0,0,
        0,0,0,0,0,0,0,0
       };
const int PROGMEM data_r[8][8]=
      {
        0,0,0,0,0,0,0,0,
        0,1,0,1,1,1,0,0,
        0,0,1,0,0,0,1,0,
        0,0,1,0,0,0,0,0,
        0,0,1,0,0,0,0,0,
        0,0,1,0,0,0,0,0,
        0,0,1,0,0,0,0,0,
        0,0,0,0,0,0,0,0
       };
const int PROGMEM data_u[8][8]=
      {
        0,0,0,0,0,0,0,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,0,1,0,
        0,1,0,0,0,1,1,0,
        0,0,1,1,1,0,1,0,
        0,0,0,0,0,0,0,0
       };
const int PROGMEM data_warning[8][8]=
      {
        0,0,0,1,1,0,0,0,
        0,0,0,1,1,0,0,0,
        0,0,0,1,1,0,0,0,
        0,0,0,1,1,0,0,0,
        0,0,0,1,1,0,0,0,
        0,0,0,0,0,0,0,0,
        0,0,0,1,1,0,0,0,
        0,0,0,1,1,0,0,0
       };
const int PROGMEM data_default[8][8]=
      {
        0,0,0,0,0,0,0,0,
        0,1,1,1,0,1,1,0,
        1,0,0,0,1,0,0,1,
        1,0,0,0,0,0,0,1,
        1,0,0,0,0,0,0,1,
        0,1,0,0,0,0,1,0,
        0,0,1,0,0,1,0,0,
        0,0,0,1,1,0,0,0
       };
       
void setup() {
  Serial.begin(9600); //启动串口通讯
  
  for(int i=0;i<8;i++){
    pinMode(colPin[i],OUTPUT);//设置输出
    pinMode(rowPin[i],OUTPUT);//设置输出
  }
  reset();
  initView();
}
void reset(){
  for(int i=0;i<8;i++){
    digitalWrite(colPin[i],LOW);
    digitalWrite(rowPin[i],HIGH);
  }
}
void dealChar(char ch){
  switch(ch){
    case '0' :{
       showChar(data_0);
       break;
    }
     case '1' :{
       showChar(data_1);
       break;
    }
     case '2' :{
       showChar(data_2);
       break;
    }
     case '3' :{
       showChar(data_3);
       break;
    }
     case '4' :{
       showChar(data_4);
       break;
    }
     case '5' :{
       showChar(data_5);
       break;
    }
     case '6' :{
       showChar(data_6);
       break;
    }
     case '7' :{
       showChar(data_7);
       break;
    }
     case '8' :{
       showChar(data_8);
       break;
    }
     case '9' :{
       showChar(data_9);
       break;
    }
     case 'A' :{
       showChar(data_A);
       break;
    }
     case 'a' :{
       showChar(data_a);
       break;
    }
     case 'b' :{
       showChar(data_b);
       break;
    }
     case 'c' :{
       showChar(data_c);
       break;
    }
     case 'd' :{
       showChar(data_d);
       break;
    }
     case 'e' :{
       showChar(data_e);
       break;
    }
     case 'H' :{
       showChar(data_H);
       break;
    }
     case 'h' :{
       showChar(data_h);
       break;
    }
     case 'i' :{
       showChar(data_i);
       break;
    }
     case 'l' :{
       showChar(data_l);
       break;
    }
     case 'n' :{
       showChar(data_n);
       break;
    }
     case 'o' :{
       showChar(data_o);
       break;
    }
     case 'r' :{
       showChar(data_r);
       break;
    }
     case 'u' :{
       showChar(data_u);
       break;
    }
    case '!' :{
       showChar(data_warning);
       break;
    }
    default :{
       showChar(data_default);
       break;
    }
  } 
}

void showChar(const int data[8][8]){
  
  for(int i=0;i<50;i++){
    for(int row=0;row<8;row++){
      digitalWrite(rowPin[row],LOW);
      for(int col=0;col<8;col++){
        digitalWrite(colPin[col],pgm_read_byte(&data[row][col]));
        }
        delay(1);
        reset();
      }
  }
  delay(100);
}
void showCharList(const char * list){
  for(int i=0;i<strlen(list);i++){
    dealChar(list[i]);
  }
}

void initView(){
  showCharList("HelloArduino!0123456789.");
}

void loop() {
  if(Serial.available()>0){
    char c = Serial.read();
    dealChar(c);
    Serial.print("char value:");
    Serial.println(c);
  }
}
C++

演示效果

微信原创文章

2022-08-10 Arduino控制8×8点阵显示

2022-05-14 收集几个前后端网站

2022-05-06 前端选择本地图片并压缩

2022-05-05 前端选择本地文件并显示

2022-05-01 写了一个很简易的Markdown编辑器

2022-04-30 Java 生成二维码（已优化）

2022-04-30 Java 生成二维码

2022-04-30 写了一个纯前端的验证码

文章作者： 续加仪
文章链接：
版权声明：本博客所有文章除特别声明外，均采用 CC BY-NC-SA 4.0 许可协议。转载请注明文章出处。
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