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This example switches on all the LEDs on a 8×8 LED matrix, the matrix is controlled by a MAX7219
Typically you will get these in kit format or they may be assembled, here is a picture of a typical module
VCC and GND pins are obvious
In the code below you can see the other required pin connections
Max7219_pinCLK = 10; Max7219_pinCS = 9; Max7219_pinDIN = 8;
Code
You will need to install the Led Control library for this example
[codesyntax lang=”cpp”]
#include “LedControl.h” /* Max7219_pinCLK = 10; Max7219_pinCS = 9; Max7219_pinDIN = 8; */ LedControl lc=LedControl(8,10,9,1); unsigned char i; unsigned char j; unsigned long delaytime=100; void setup() { lc.shutdown(0,false); lc.setIntensity(0,8); lc.clearDisplay(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() { single(); lc.clearDisplay(0); }
[/codesyntax]
Links
10PCS LED Dot Matrix Display Module Red 16Pin 8×8 Common Anode