【雕爷学编程】Arduino动手做（22）——8X8 LED点阵MAX7219屏6

37款传感器与模块的提法，在网络上广泛流传，其实Arduino能够兼容的传感器模块肯定是不止37种的。鉴于本人手头积累了一些传感器和模块，依照实践出真知（一定要动手做）的理念，以学习和交流为目的，这里准备逐一动手试试做实验，不管成功与否，都会记录下来—小小的进步或是搞不定的问题，希望能够抛砖引玉。

【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
实验二十二：MAX7219点阵显示模块（8X8 LED共阴屏幕）

【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
项目三十三：动态红心

实验开源代码

/*
  【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
  实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
  项目三十三：动态红心
  接脚连线：
  MAX7219      UNO
  VCC  →→→→→ 5V
  GND  →→→→→ GND
  DIN  →→→→→ D12（数据，数据接收引脚）
  CS   →→→→→ D11（负载，命令接收引脚）
  CLK  →→→→→ D10（时钟，时钟引脚）
*/

unsigned char i;
unsigned char j; 
 
int Max7219_pinCLK = 10;
int Max7219_pinCS = 11;
int Max7219_pinDIN = 12;
 
unsigned char disp1[19][8]={0x0c,0x1e,0x3e,0x7c,0x7c,0x3e,0x1e,0x0c};
 
void Write_Max7219_byte(unsigned char DATA) 
{   
  unsigned char i;
  digitalWrite(Max7219_pinCS,LOW);  
  for(i=8;i>=1;i--)
  {    
    digitalWrite(Max7219_pinCLK,LOW);
    digitalWrite(Max7219_pinDIN,DATA&0x80);
    DATA = DATA<<1;
    digitalWrite(Max7219_pinCLK,HIGH);
  }                                 
}
 
void Write_Max7219(unsigned char address,unsigned char dat)
{
  digitalWrite(Max7219_pinCS,LOW);
  Write_Max7219_byte(address);          
  Write_Max7219_byte(dat);               
  digitalWrite(Max7219_pinCS,HIGH);
}
 
void Init_MAX7219(void)
{
  Write_Max7219(0x09, 0x00);      
  Write_Max7219(0x0a, 0x03);      
  Write_Max7219(0x0b, 0x07);       
  Write_Max7219(0x0c, 0x01);      
  Write_Max7219(0x0f, 0x00);      
}
 
void setup()
{
  pinMode(Max7219_pinCLK,OUTPUT);
  pinMode(Max7219_pinCS,OUTPUT);
  pinMode(Max7219_pinDIN,OUTPUT);
  delay(500);
  Init_MAX7219();
}
 
void loop()
{ 
  for(j=0;j<19;j++)
  {
    for(i=1;i<9;i++)
      Write_Max7219(i,disp1[j][i-1]);
    delay(500);
  }   
}

【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
项目三十四：打开/关闭其 LED 组合显示 ASCII 字符

实验开源代码

/*
  【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
  实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
  项目三十四：打开/关闭其 LED 组合显示 ASCII 字符
  接脚连线：
  MAX7219      UNO
  VCC  →→→→→ 5V
  GND  →→→→→ GND
  DIN  →→→→→ D12（数据，数据接收引脚）
  CS   →→→→→ D11（负载，命令接收引脚）
  CLK  →→→→→ D10（时钟，时钟引脚）
*/

//We always have to include the library
#include "LedControlMS.h"

/*
 Now we need a LedControl to work with.
 ***** These pin numbers will probably not work with your hardware *****
 pin 12 is connected to the DataIn 
 pin 11 is connected to the CLK 
 pin 10 is connected to LOAD 
 We have only a single MAX72XX.
 */
#define NBR_MTX 2 
LedControl lc=LedControl(12,10,11, NBR_MTX);

String digits= "1234567890";
int digitCounter=0;
/* we always wait a bit between updates of the display */
unsigned long delaytime=300;


void setup() {
  /*
   The MAX72XX is in power-saving mode on startup,
   we have to do a wakeup call
   */
  Serial.begin (9600);
  Serial.println("Setup");
  digitCounter=0;
  for (int i=0; i< NBR_MTX; i++){
    lc.shutdown(i,false);
  /* Set the brightness to a medium values */
    lc.setIntensity(i,8);
  /* and clear the display */
    lc.clearDisplay(i);
  }
  
  Serial.println("LED0: 0 0");
  lc.setLed(0,0,0,true);
  delay(1000);
  Serial.println("LED0: 0 7");
  lc.setLed(0,0,7,true);
  delay(1000);
  Serial.println("LED0: 7 0");
  lc.setLed(0,7,0,true);
  delay(1000);
  Serial.println("LED0: 7 7");  
  lc.setLed(0,7,7,true);
  delay(1000);
  Serial.println("LED0: 0 0 off");
  lc.setLed(0,0,0,false);
  delay(1000);
  Serial.println("LED0: 0 7 off");
  lc.setLed(0,0,7,false);
  delay(1000);
  Serial.println("LED0: 7 0 off");
  lc.setLed(0,7,0,false);
  delay(1000);
  Serial.println("LED0: 7 7 off");  
  lc.setLed(0,7,7,false);
  delay(1000);  
  //clearAll();
  
  lc.setRow(0,1,0x0C);
  delay(1000);
  lc.clearDisplay(0);
  lc.setRow(0,1,0xC0);
  delay(1000);
  lc.clearDisplay(0);

  lc.setColumn(0,1,0x0C);
  delay(1000);
  lc.clearDisplay(0);
  lc.setColumn(0,1,0xC0);
  delay(1000);
  lc.clearDisplay(0);
  
  lc.writeString(0,"Hola Mundo");
  delay(1000);
  lc.clearAll();
  scrollLeft('O');
  delay(1000);
  lc.clearAll();
  scrollRight('O');
  delay(1000);
  lc.clearAll();
}

void loop() { 
  char ch= digits[digitCounter];
  digitCounter++;
  if (digitCounter>9) digitCounter=0;
  lc.displayChar(0, lc.getCharArrayPosition(ch));
  delay(500);
  lc.clearAll();
  delay(200);
}


void scrollLeft(char ch){
  int pos =lc.getCharArrayPosition(ch);
  for (int scroll =0; scroll<6; scroll++) {
     for (int i=scroll; i<6;i++) {
        lc.setRow(0,i-scroll, alphabetBitmap[pos][i]);
    } 
    delay(200);
    lc.clearDisplay(0);
  }
}

void scrollRight(char ch){
  int pos =lc.getCharArrayPosition(ch);
  for (int scroll =0; scroll<8; scroll++) {
     for (int i=0; i<6;i++) {
        if (scroll+i<8) lc.setRow(0, scroll+i, alphabetBitmap[pos][i]);
    } 
    delay(200);
    lc.clearDisplay(0);
  }
}

实验串口返回情况

【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
项目三十五：逐点排列

实验开源代码

/*
  【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
  实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
  项目三十五：逐点排列
  接脚连线：
  MAX7219      UNO
  VCC  →→→→→ 5V
  GND  →→→→→ GND
  DIN  →→→→→ D12（数据，数据接收引脚）
  CS   →→→→→ D11（负载，命令接收引脚）
  CLK  →→→→→ D10（时钟，时钟引脚）
*/

//We always have to include the library
#include "LedControlMS.h"

/*
 Now we need a LedControl to work with.
 ***** These pin numbers will probably not work with your hardware *****
 pin 12 is connected to the DataIn 
 pin 11 is connected to the CLK 
 pin 10 is connected to LOAD 
 We have only a single MAX72XX.
 */
LedControl lc=LedControl(12,10,11,1);

/* we always wait a bit between updates of the display */
unsigned long delaytime=100;

void setup() {
  /*
   The MAX72XX is in power-saving mode on startup,
   we have to do a wakeup call
   */
  lc.shutdown(0,false);
  /* Set the brightness to a medium values */
  lc.setIntensity(0,8);
  /* and clear the display */
  lc.clearDisplay(0);
}

/*
 This method will display the characters for the
 word "Arduino" one after the other on the matrix. 
 (you need at least 5x7 leds to see the whole chars)
 */
void writeArduinoOnMatrix() {
  /* here is the data for the characters */
  byte a[5]={B01111110,B10001000,B10001000,B10001000,B01111110};
  byte r[5]={B00111110,B00010000,B00100000,B00100000,B00010000};
  byte d[5]={B00011100,B00100010,B00100010,B00010010,B11111110};
  byte u[5]={B00111100,B00000010,B00000010,B00000100,B00111110};
  byte i[5]={B00000000,B00100010,B10111110,B00000010,B00000000};
  byte n[5]={B00111110,B00010000,B00100000,B00100000,B00011110};
  byte o[5]={B00011100,B00100010,B00100010,B00100010,B00011100};

  /* now display them one by one with a small delay */
  lc.setRow(0,0,a[0]);
  lc.setRow(0,1,a[1]);
  lc.setRow(0,2,a[2]);
  lc.setRow(0,3,a[3]);
  lc.setRow(0,4,a[4]);
  delay(delaytime);
  lc.setRow(0,0,r[0]);
  lc.setRow(0,1,r[1]);
  lc.setRow(0,2,r[2]);
  lc.setRow(0,3,r[3]);
  lc.setRow(0,4,r[4]);
  delay(delaytime);
  lc.setRow(0,0,d[0]);
  lc.setRow(0,1,d[1]);
  lc.setRow(0,2,d[2]);
  lc.setRow(0,3,d[3]);
  lc.setRow(0,4,d[4]);
  delay(delaytime);
  lc.setRow(0,0,u[0]);
  lc.setRow(0,1,u[1]);
  lc.setRow(0,2,u[2]);
  lc.setRow(0,3,u[3]);
  lc.setRow(0,4,u[4]);
  delay(delaytime);
  lc.setRow(0,0,i[0]);
  lc.setRow(0,1,i[1]);
  lc.setRow(0,2,i[2]);
  lc.setRow(0,3,i[3]);
  lc.setRow(0,4,i[4]);
  delay(delaytime);
  lc.setRow(0,0,n[0]);
  lc.setRow(0,1,n[1]);
  lc.setRow(0,2,n[2]);
  lc.setRow(0,3,n[3]);
  lc.setRow(0,4,n[4]);
  delay(delaytime);
  lc.setRow(0,0,o[0]);
  lc.setRow(0,1,o[1]);
  lc.setRow(0,2,o[2]);
  lc.setRow(0,3,o[3]);
  lc.setRow(0,4,o[4]);
  delay(delaytime);
  lc.setRow(0,0,0);
  lc.setRow(0,1,0);
  lc.setRow(0,2,0);
  lc.setRow(0,3,0);
  lc.setRow(0,4,0);
  delay(delaytime);
}

/*
  This function lights up a some Leds in a row.
 The pattern will be repeated on every row.
 The pattern will blink along with the row-number.
 row number 4 (index==3) will blink 4 times etc.
 */
void rows() {
  for(int row=0;row<8;row++) {
    delay(delaytime);
    lc.setRow(0,row,B10100000);
    delay(delaytime);
    lc.setRow(0,row,(byte)0);
    for(int i=0;i<row;i++) {
      delay(delaytime);
      lc.setRow(0,row,B10100000);
      delay(delaytime);
      lc.setRow(0,row,(byte)0);
    }
  }
}

/*
  This function lights up a some Leds in a column.
 The pattern will be repeated on every column.
 The pattern will blink along with the column-number.
 column number 4 (index==3) will blink 4 times etc.
 */
void columns() {
  for(int col=0;col<8;col++) {
    delay(delaytime);
    lc.setColumn(0,col,B10100000);
    delay(delaytime);
    lc.setColumn(0,col,(byte)0);
    for(int i=0;i<col;i++) {
      delay(delaytime);
      lc.setColumn(0,col,B10100000);
      delay(delaytime);
      lc.setColumn(0,col,(byte)0);
    }
  }
}

/* 
 This function will light up every Led on the matrix.
 The led will blink along with the row-number.
 row number 4 (index==3) will blink 4 times etc.
 */
void single() {
  for(int row=0;row<8;row++) {
    for(int col=0;col<8;col++) {
      delay(delaytime);
      lc.setLed(0,row,col,true);
      delay(delaytime);
      for(int i=0;i<col;i++) {
        lc.setLed(0,row,col,false);
        delay(delaytime);
        lc.setLed(0,row,col,true);
        delay(delaytime);
      }
    }
  }
}

void loop() { 
  writeArduinoOnMatrix();
  rows();
  columns();
  single();
}

【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
项目三十六：快速扫描矩阵所以点

实验开源代码

/*
  【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
  实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
  项目三十六：快速扫描矩阵所以点
  接脚连线：
  MAX7219      UNO
  VCC  →→→→→ 5V
  GND  →→→→→ GND
  DIN  →→→→→ D12（数据，数据接收引脚）
  CS   →→→→→ D11（负载，命令接收引脚）
  CLK  →→→→→ D10（时钟，时钟引脚）
*/

//We always have to include the library
#include "LedControlMS.h"

/*
 Now we need a LedControl to work with.
 ***** These pin numbers will probably not work with your hardware *****
 pin 12 is connected to the DataIn 
 pin 11 is connected to the CLK 
 pin 10 is connected to LOAD 
 ***** Please set the number of devices you have *****
 But the maximum default of 8 MAX72XX wil also work.
 */
LedControl lc=LedControl(12,10,11,1);

/* we always wait a bit between updates of the display */
unsigned long delaytime=10;

/* 
 This time we have more than one device. 
 But all of them have to be initialized 
 individually.
 */
void setup() {
  //we have already set the number of devices when we created the LedControl
  int devices=lc.getDeviceCount();
  //we have to init all devices in a loop
  for(int address=0;address<devices;address++) {
    /*The MAX72XX is in power-saving mode on startup*/
    lc.shutdown(address,false);
    /* Set the brightness to a medium values */
    lc.setIntensity(address,8);
    /* and clear the display */
    lc.clearDisplay(address);
  }
}

void loop() { 
  //read the number cascaded devices
  int devices=lc.getDeviceCount();
  
  //we have to init all devices in a loop
  for(int row=0;row<8;row++) {
    for(int col=0;col<8;col++) {
      for(int address=0;address<devices;address++) {
        delay(delaytime);
        lc.setLed(address,row,col,true);
        delay(delaytime);
        lc.setLed(address,row,col,false);
      }
    }
  }
}

【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
项目三十七：动态字符串

实验开源代码

/*
  【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
  实验二十二：MAX7219点阵显示模块（8X8 LED共阴）
  项目三十七：动态字符串
  接脚连线：
  MAX7219      UNO
  VCC  →→→→→ 5V
  GND  →→→→→ GND
  DIN  →→→→→ D12（数据，数据接收引脚）
  CS   →→→→→ D11（负载，命令接收引脚）
  CLK  →→→→→ D10（时钟，时钟引脚）
*/

//We always have to include the library
#include "LedControlMS.h"

/*
 Now we need a LedControl to work with.
 ***** These pin numbers will probably not work with your hardware *****
 pin 12 is connected to the DataIn 
 pin 11 is connected to the CLK 
 pin 10 is connected to LOAD 
 We have only a single MAX72XX.
 */
LedControl lc=LedControl(12,10,11,1);

/* we always wait a bit between updates of the display */
unsigned long delaytime=250;

void setup() {
  /*
   The MAX72XX is in power-saving mode on startup,
   we have to do a wakeup call
   */
  lc.shutdown(0,false);
  /* Set the brightness to a medium values */
  lc.setIntensity(0,8);
  /* and clear the display */
  lc.clearDisplay(0);
}


/*
 This method will display the characters for the
 word "Arduino" one after the other on digit 0. 
 */
void writeArduinoOn7Segment() {
  lc.setChar(2,0,'a',false);
  delay(delaytime);
  lc.setRow(2,0,0x05);
  delay(delaytime);
  lc.setChar(2,0,'d',false);
  delay(delaytime);
  lc.setRow(2,0,0x1c);
  delay(delaytime);
  lc.setRow(2,0,B00010000);
  delay(delaytime);
  lc.setRow(2,0,0x15);
  delay(delaytime);
  lc.setRow(2,0,0x1D);
  delay(delaytime);
  lc.clearDisplay(0);
  delay(delaytime);
} 

/*
  This method will scroll all the hexa-decimal
 numbers and letters on the display. You will need at least
 four 7-Segment digits. otherwise it won't really look that good.
 */
void scrollDigits() {
  for(int i=0;i<13;i++) {
    lc.setDigit(0,3,i,false);
    lc.setDigit(0,2,i+1,false);
    lc.setDigit(0,1,i+2,false);
    lc.setDigit(0,0,i+3,false);
    delay(delaytime);
  }
  lc.clearDisplay(0);
  delay(delaytime);
}

void loop() { 
  writeArduinoOn7Segment();
  scrollDigits();
}

Arduino点阵文字(中) 8x8 LED Matrix MAX7219 Tutorial with Scrolling Text

https://www.bilibili.com/video/BV1Et411k7U2?from=search&seid=4477785334025497564&spm_id_from=333.337.0.0

Arduino Nano + MAX7219 8*8点阵组合 汉字显示

https://www.bilibili.com/video/av375403904/?from=search&seid=3172695889868987008&spm_id_from=333.337.0.0