Hi everybody, this is my first post so bear over with me, I try to follow the rules.
- Arduino Mega 2560 and IDE 1.8.7
- 8x8 LED Matrix made from NeoPixel LED strips
- 8x8 Mercury switches as "knock" sensors arranged with
Knocking over a Mercury switch will turn on the underlying LED
I run the code and everything is working.
However, I need the code to run faster as the mercury switch is not always sensed if it is only knocked over for a brief moment.
Who can guess why the code is running slow?
- Too large grid?
- Slow Neopixel libraries?
- Bad code architecture?
//Libraries
#include <Adafruit_NeoPixel.h>
#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
//Matrix data pin
#define PIN 6
//Setup of Matrix start and direction
Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(8, 8, PIN,
NEO_MATRIX_TOP + NEO_MATRIX_LEFT +
NEO_MATRIX_ROWS + NEO_MATRIX_ZIGZAG,
NEO_GRB + NEO_KHZ800);
int row[] = {1,2,3,4,5,6,7,8}; // Defining row pins of mercury switches connected to Arduino pins
int col[] = {14,15,16,17,18,19,20,21}; // Defining column pins of mercury switches connected to Arduino
int r = 8; //number of rows
int c = 8; //number of columns
int i, j; // Two counter variables to count inside for loop - row and column
int col_scan; // Variable to hold value of scanned columns
int LEDmatrix[8][8]; // Array of 8x8 integer value from 0 to 255, value will light on
[b]
void setup()[/b]
{
Serial.begin(9600);
for (i = 0; i < r; i++){
pinMode(row[i], OUTPUT);
}
for (j = 0; j < c; j++) {
pinMode(col[j], INPUT);
}
matrix.begin();
matrix.setBrightness(255);
//Startup animation
matrix.fillScreen(0);
matrix.show();
delay(500);
matrix.fillScreen(matrix.Color(255, 255, 255));
matrix.show();
delay(500);
matrix.fillScreen(0);
matrix.show();
}
[b]void loop() {[/b]
mercuryRead(); // Reads which switches are turned and max the integer value to 255
writeLED(); // Writes values from matrix to light on LED strip/matrix
dimLED(); // Reduces the value of each integer in the matrix
}
[b]
void mercuryRead(){[/b]
for (i = 0; i < r; i++){
digitalWrite(row[i], HIGH);
for (j = 0; j < c; j++){
col_scan = digitalRead(col[j]);
if (col_scan == HIGH){
LEDmatrix[i][j] = 255;
}
}
digitalWrite(row[i], LOW);
}
}
[b]
void writeLED(){[/b]
for(i = 0; i < r; i++){
for(j = 0; j < c; j++){
matrix.drawPixel(i, j, matrix.Color(LEDmatrix[i][j], LEDmatrix[i][j], LEDmatrix[i][j]));
matrix.show();
}
}
}
[b]void dimLED(){[/b]
for (i=0; i < r; i++){
for (j = 0; j < c; j++){
if (LEDmatrix[i][j] > 0){
LEDmatrix[i][j] = LEDmatrix[i][j] - 1;
}else{
LEDmatrix[i][j] = 0;
}
}
}
