8x8 Dot Matrix Interfacing
with Arduino Uno
By Engr.Habib Ur Rehman
Components/Equipment Required:
Following Components/Equipment are
required to perform task.
1.
Arduino
Uno (https://piees.pk/product/arduino-uno-r3/)
2.
8x8
Dot Matrix Max7219 Module
3.
Breadboard
4.
Jumper
Wires (https://piees.pk/product-category/jumper-wires/)
Circuit
Diagram:
Arduino Program:
Note: 8x8 Dot Matrix Library for Arduino Uno is
named as “LEDControlMS”, just copy and paste LEDControlMS folder in Arduino
library Folder. (https://github.com/shaai/Arduino_LED_matrix_sketch)
//We
always have to include the library
#include
"LedControlMS.h"
LedControl
lc=LedControl(12,11,10,1);
unsigned
long delaytime=100;
void
setup() {
lc.shutdown(0,false);
lc.setIntensity(0,8);
lc.clearDisplay(0);
}
void
writeArduinoOnMatrix() {
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};
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);
}
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);
}
}
}
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);
}
}
}
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();
}
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