Controlling 8x8 Dot Matrix with Max7219 and Arduino

So far I was controling those matrixes with multiplexing. In this video I would use MAX7219 chip to do it

Nov 29, 2020

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max7219

8x8 matrix

Components and supplies

Arduino Nano R3

MAXREFDES99# MAX7219 Display Driver Shield

Project description

Code

MAX7219 - using Led Control library to display all leds one by one

arduino

1//Mario's Ideas
2//MAX7219 - using Led Control library to display all   leds one by one
3#include <LedControl.h>
4
5int DIN = 11;
6int CS = 7;
7int   CLK = 13;
8
9LedControl lc=LedControl(DIN, CLK, CS,0);
10
11
12
13void setup()   {
14
15  lc.shutdown(0,false);
16  lc.setIntensity(0,0);
17  lc.clearDisplay(0);
18}
19
20void   loop() {
21  for(int j=0;j<8;j++){
22     for(int i=0;i<8;i++){
23       lc.setLed(0,j,i,true);
24        delay(100);
25       lc.setLed(0,j,i,false);
26     }
27  }
28}

//Mario's Ideas
//MAX7219 - using Led Control library to display all   leds one by one
#include <LedControl.h>

int DIN = 11;
int CS = 7;
int   CLK = 13;

LedControl lc=LedControl(DIN, CLK, CS,0);



void setup()   {

  lc.shutdown(0,false);
  lc.setIntensity(0,0);
  lc.clearDisplay(0);
}

void   loop() {
  for(int j=0;j<8;j++){
     for(int i=0;i<8;i++){
       lc.setLed(0,j,i,true);
        delay(100);
       lc.setLed(0,j,i,false);
     }
  }
}

MAX7219 - using SPI library to display 8x8 bitmap

arduino

1// Mario's Ideas
2//MAX7219 - using SPI library to display 8x8 bitmap
3#include   <SPI.h>
4#define CS 7
5
6// MAX7219 Control registers
7
8#define DECODE_MODE   9 
9#define INTENSITY 0x0A
10#define SCAN_LIMIT 0x0B 
11#define SHUTDOWN 0x0C
12#define   DISPLAY_TEST 0x0F
13
14byte Apple [8]={B00011000,B00001000,B01110110,B11111111,B11111111,B11111111,B01111010,B00110100};
15
16void   SendData(uint8_t address, uint8_t value) {  
17  digitalWrite(CS, LOW);   
18   SPI.transfer(address);      // Send address.
19  SPI.transfer(value);        //   Send the value.
20  digitalWrite(CS, HIGH); // Finish transfer.
21}
22void setup()   {
23  pinMode(CS, OUTPUT);  
24  SPI.setBitOrder(MSBFIRST);   // Most significant   bit first 
25  SPI.begin();                 // Start SPI
26  SendData(DISPLAY_TEST,   0x01);       // Run test - All LED segments lit.
27  delay(1000);
28  SendData(DISPLAY_TEST,   0x00);           // Finish test mode.
29  SendData(DECODE_MODE, 0x00);            //   Disable BCD mode. 
30  SendData(INTENSITY, 0x0e);              // Use lowest intensity.   
31  SendData(SCAN_LIMIT, 0x0f);             // Scan all digits.
32  SendData(SHUTDOWN,   0x01);               // Turn on chip.
33}
34void loop()  {
35
36for (int i=1;i<9;i++)   SendData(i, Apple[i-1]);
37
38}

// Mario's Ideas
//MAX7219 - using SPI library to display 8x8 bitmap
#include   <SPI.h>
#define CS 7

// MAX7219 Control registers

#define DECODE_MODE   9 
#define INTENSITY 0x0A
#define SCAN_LIMIT 0x0B 
#define SHUTDOWN 0x0C
#define   DISPLAY_TEST 0x0F

byte Apple [8]={B00011000,B00001000,B01110110,B11111111,B11111111,B11111111,B01111010,B00110100};

void   SendData(uint8_t address, uint8_t value) {  
  digitalWrite(CS, LOW);   
   SPI.transfer(address);      // Send address.
  SPI.transfer(value);        //   Send the value.
  digitalWrite(CS, HIGH); // Finish transfer.
}
void setup()   {
  pinMode(CS, OUTPUT);  
  SPI.setBitOrder(MSBFIRST);   // Most significant   bit first 
  SPI.begin();                 // Start SPI
  SendData(DISPLAY_TEST,   0x01);       // Run test - All LED segments lit.
  delay(1000);
  SendData(DISPLAY_TEST,   0x00);           // Finish test mode.
  SendData(DECODE_MODE, 0x00);            //   Disable BCD mode. 
  SendData(INTENSITY, 0x0e);              // Use lowest intensity.   
  SendData(SCAN_LIMIT, 0x0f);             // Scan all digits.
  SendData(SHUTDOWN,   0x01);               // Turn on chip.
}
void loop()  {

for (int i=1;i<9;i++)   SendData(i, Apple[i-1]);

}

MAX7219 - using Led Control library to display two 8x8 bitmaps

arduino

1//Mario's Ideas
2//MAX7219 - using Led Control library to display 8x8  bitmap
3#include <LedControl.h>
4
5int DIN = 11;
6int CS = 7;
7int CLK  = 13;
8LedControl lc=LedControl(DIN, CLK, CS,0);
9
10int Cat[8] ={B10001000,B11111000,B10101000,B01110001,B00100001,B01111001,B01111101,B10111110  };
11byte Apple [8]={B00011000,B00001000,B01110110,B11111111,B11111111,B11111111,B01111010,B00110100};
12
13void  setup() {
14  lc.shutdown(0,false);
15  lc.setIntensity(0,0);
16  lc.clearDisplay(0);
17}
18  
19void loop(){
20  for(int i=0;i<8;i++) lc.setRow(0,i,Apple[i]);
21  delay(5000);
22  lc.clearDisplay(0);
23  for(int i=0;i<8;i++) lc.setRow(0,i,Cat[i]);
24  delay(5000);
25  lc.clearDisplay(0);
26}
27
28

//Mario's Ideas
//MAX7219 - using Led Control library to display 8x8  bitmap
#include <LedControl.h>

int DIN = 11;
int CS = 7;
int CLK  = 13;
LedControl lc=LedControl(DIN, CLK, CS,0);

int Cat[8] ={B10001000,B11111000,B10101000,B01110001,B00100001,B01111001,B01111101,B10111110  };
byte Apple [8]={B00011000,B00001000,B01110110,B11111111,B11111111,B11111111,B01111010,B00110100};

void  setup() {
  lc.shutdown(0,false);
  lc.setIntensity(0,0);
  lc.clearDisplay(0);
}
  
void loop(){
  for(int i=0;i<8;i++) lc.setRow(0,i,Apple[i]);
  delay(5000);
  lc.clearDisplay(0);
  for(int i=0;i<8;i++) lc.setRow(0,i,Cat[i]);
  delay(5000);
  lc.clearDisplay(0);
}

MAX7219 - using Led Control library to scroll the sample text

arduino

1// Mario's Ideas
2//MAX7219 - using Led Control library to scroll the  sample text
3#include <LedControl.h>
4
5int DIN = 11;
6int CS = 7;
7int  CLK = 13;
8LedControl lc=LedControl(DIN, CLK, CS,0);
9
10int position=0;
11
12int  Marios_ideas [8] [54] ={
13  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
14  {0,1,0,0,0,1,0,0,1,1,0,0,1,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,0,1,1,1,0,0,1,1,1,0,0,1,1,0,0,0,1,1,0,0,0,0},
15  {0,1,1,0,1,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
16  {0,1,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,0,0,0,0},
17  {0,1,0,0,0,1,0,1,1,1,1,0,1,1,1,0,0,1,0,1,0,0,1,0,0,1,1,0,0,0,0,1,0,1,0,0,1,0,1,1,1,0,1,1,1,1,0,0,1,1,0,0,0,0},
18  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,1,0,0,0},
19  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,1,0,0,1,0,0, 1,0,0,0,1,0,1,1,1,0,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
20  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0}
21  };
22
23
24void setup() {
25
26   lc.shutdown(0,false);
27   lc.setIntensity(0,0);
28   lc.clearDisplay(0);
29}
30
31void loop() {
32  for (int j=0;j<8;j++){
33    for (int i=0;i<8;i++){
34    lc.setLed(0,i,j,Marios_ideas[j][(i+position)-abs((i+position)/54)*54]);
35    }
36  }
37  delay(20);
38  position=position+1;
39}  
40

// Mario's Ideas
//MAX7219 - using Led Control library to scroll the  sample text
#include <LedControl.h>

int DIN = 11;
int CS = 7;
int  CLK = 13;
LedControl lc=LedControl(DIN, CLK, CS,0);

int position=0;

int  Marios_ideas [8] [54] ={
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,1,0,0,0,1,0,0,1,1,0,0,1,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,0,1,1,1,0,0,1,1,1,0,0,1,1,0,0,0,1,1,0,0,0,0},
  {0,1,1,0,1,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
  {0,1,0,1,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,0,0,0,0},
  {0,1,0,0,0,1,0,1,1,1,1,0,1,1,1,0,0,1,0,1,0,0,1,0,0,1,1,0,0,0,0,1,0,1,0,0,1,0,1,1,1,0,1,1,1,1,0,0,1,1,0,0,0,0},
  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,1,0,0,0},
  {0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,1,1,0,0,1,0,0, 1,0,0,0,1,0,1,1,1,0,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0}
  };


void setup() {

   lc.shutdown(0,false);
   lc.setIntensity(0,0);
   lc.clearDisplay(0);
}

void loop() {
  for (int j=0;j<8;j++){
    for (int i=0;i<8;i++){
    lc.setLed(0,i,j,Marios_ideas[j][(i+position)-abs((i+position)/54)*54]);
    }
  }
  delay(20);
  position=position+1;
}

MAX7219 - using SPI library to display 8x8 bitmap

arduino

1// Mario's Ideas
2//MAX7219 - using SPI library to display 8x8 bitmap
3#include  <SPI.h>
4#define CS 7
5
6// MAX7219 Control registers
7
8#define DECODE_MODE  9 
9#define INTENSITY 0x0A
10#define SCAN_LIMIT 0x0B 
11#define SHUTDOWN 0x0C
12#define  DISPLAY_TEST 0x0F
13
14byte Apple [8]={B00011000,B00001000,B01110110,B11111111,B11111111,B11111111,B01111010,B00110100};
15
16void  SendData(uint8_t address, uint8_t value) {  
17  digitalWrite(CS, LOW);   
18  SPI.transfer(address);      // Send address.
19  SPI.transfer(value);        //  Send the value.
20  digitalWrite(CS, HIGH); // Finish transfer.
21}
22void setup()  {
23  pinMode(CS, OUTPUT);  
24  SPI.setBitOrder(MSBFIRST);   // Most significant  bit first 
25  SPI.begin();                 // Start SPI
26  SendData(DISPLAY_TEST,  0x01);       // Run test - All LED segments lit.
27  delay(1000);
28  SendData(DISPLAY_TEST,  0x00);           // Finish test mode.
29  SendData(DECODE_MODE, 0x00);            //  Disable BCD mode. 
30  SendData(INTENSITY, 0x0e);              // Use lowest intensity.  
31  SendData(SCAN_LIMIT, 0x0f);             // Scan all digits.
32  SendData(SHUTDOWN,  0x01);               // Turn on chip.
33}
34void loop()  {
35
36for (int i=1;i<9;i++)  SendData(i, Apple[i-1]);
37
38}

// Mario's Ideas
//MAX7219 - using SPI library to display 8x8 bitmap
#include  <SPI.h>
#define CS 7

// MAX7219 Control registers

#define DECODE_MODE  9 
#define INTENSITY 0x0A
#define SCAN_LIMIT 0x0B 
#define SHUTDOWN 0x0C
#define  DISPLAY_TEST 0x0F

byte Apple [8]={B00011000,B00001000,B01110110,B11111111,B11111111,B11111111,B01111010,B00110100};

void  SendData(uint8_t address, uint8_t value) {  
  digitalWrite(CS, LOW);   
  SPI.transfer(address);      // Send address.
  SPI.transfer(value);        //  Send the value.
  digitalWrite(CS, HIGH); // Finish transfer.
}
void setup()  {
  pinMode(CS, OUTPUT);  
  SPI.setBitOrder(MSBFIRST);   // Most significant  bit first 
  SPI.begin();                 // Start SPI
  SendData(DISPLAY_TEST,  0x01);       // Run test - All LED segments lit.
  delay(1000);
  SendData(DISPLAY_TEST,  0x00);           // Finish test mode.
  SendData(DECODE_MODE, 0x00);            //  Disable BCD mode. 
  SendData(INTENSITY, 0x0e);              // Use lowest intensity.  
  SendData(SCAN_LIMIT, 0x0f);             // Scan all digits.
  SendData(SHUTDOWN,  0x01);               // Turn on chip.
}
void loop()  {

for (int i=1;i<9;i++)  SendData(i, Apple[i-1]);

}

MAX7219 - using Led Control library to display all leds one by one

arduino

1//Mario's Ideas
2//MAX7219 - using Led Control library to display all  leds one by one
3#include <LedControl.h>
4
5int DIN = 11;
6int CS = 7;
7int  CLK = 13;
8
9LedControl lc=LedControl(DIN, CLK, CS,0);
10
11
12
13void setup()  {
14
15  lc.shutdown(0,false);
16  lc.setIntensity(0,0);
17  lc.clearDisplay(0);
18}
19
20void  loop() {
21  for(int j=0;j<8;j++){
22     for(int i=0;i<8;i++){
23       lc.setLed(0,j,i,true);
24       delay(100);
25       lc.setLed(0,j,i,false);
26     }
27  }
28}

//Mario's Ideas
//MAX7219 - using Led Control library to display all  leds one by one
#include <LedControl.h>

int DIN = 11;
int CS = 7;
int  CLK = 13;

LedControl lc=LedControl(DIN, CLK, CS,0);



void setup()  {

  lc.shutdown(0,false);
  lc.setIntensity(0,0);
  lc.clearDisplay(0);
}

void  loop() {
  for(int j=0;j<8;j++){
     for(int i=0;i<8;i++){
       lc.setLed(0,j,i,true);
       delay(100);
       lc.setLed(0,j,i,false);
     }
  }
}

MAX7219 - using Led Control library to display two 8x8 bitmaps

arduino

1//Mario's Ideas
2//MAX7219 - using Led Control library to display 8x8
3  bitmap
4#include <LedControl.h>
5
6int DIN = 11;
7int CS = 7;
8int CLK
9  = 13;
10LedControl lc=LedControl(DIN, CLK, CS,0);
11
12int Cat[8] ={B10001000,B11111000,B10101000,B01110001,B00100001,B01111001,B01111101,B10111110
13  };
14byte Apple [8]={B00011000,B00001000,B01110110,B11111111,B11111111,B11111111,B01111010,B00110100};
15
16void
17  setup() {
18  lc.shutdown(0,false);
19  lc.setIntensity(0,0);
20  lc.clearDisplay(0);
21}
22
23  
24void loop(){
25  for(int i=0;i<8;i++) lc.setRow(0,i,Apple[i]);
26  delay(5000);
27
28  lc.clearDisplay(0);
29  for(int i=0;i<8;i++) lc.setRow(0,i,Cat[i]);
30  delay(5000);
31
32  lc.clearDisplay(0);
33}
34
35

//Mario's Ideas
//MAX7219 - using Led Control library to display 8x8
  bitmap
#include <LedControl.h>

int DIN = 11;
int CS = 7;
int CLK
  = 13;
LedControl lc=LedControl(DIN, CLK, CS,0);

int Cat[8] ={B10001000,B11111000,B10101000,B01110001,B00100001,B01111001,B01111101,B10111110
  };
byte Apple [8]={B00011000,B00001000,B01110110,B11111111,B11111111,B11111111,B01111010,B00110100};

void
  setup() {
  lc.shutdown(0,false);
  lc.setIntensity(0,0);
  lc.clearDisplay(0);
}

  
void loop(){
  for(int i=0;i<8;i++) lc.setRow(0,i,Apple[i]);
  delay(5000);

  lc.clearDisplay(0);
  for(int i=0;i<8;i++) lc.setRow(0,i,Cat[i]);
  delay(5000);

  lc.clearDisplay(0);
}

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