Teclat matriu de polsadors

/* * aug16a * Teclat matricial amb mòdul PCF8574 I2C I/O * Control Led RGB * Per a ESP8266 NodeMcu 1.0 */#include <Keypad_I2C.h>

#include <Keypad.h>

#include <Wire.h>

#define I2CADDR 0x38

const int ledR = D8;const int ledG = D7;const int ledB = D6;int r,g,b;const byte ROWS = 4; //four rowsconst byte COLS = 4; //four columns

char keys[ROWS][COLS] = {

  {'1', '2', '3', 'S'},

  {'4', '5', '6', 'G'},

  {'7', '8', '9', 'L'},

  {'*', '0', '#', 'P'}

};

// Digitran keypad, bit numbers of PCF8574 i/o port

byte rowPins[ROWS] = {0, 1, 2, 3}; //connect to the row pinouts of the keypad

byte colPins[COLS] = {7, 6, 5, 4}; //connect to the column pinouts of the keypad

Keypad_I2C kpd( makeKeymap(keys), rowPins, colPins, ROWS, COLS, I2CADDR, PCF8574 );

void setup() {  r=255;   g=255;  b=255;  color(r,g,b);  Wire.begin( );  kpd.begin( makeKeymap(keys) );

}

void loop() {  char key = kpd.getKey();  if (key) {    switch(key){      case '1':        r++;

        if (r>255) r=255;

        break;

      case '4':

        r--;

        if (r<0) r=0;

        break;

      case '2':

        g++;

        if (g>255) g=255;

        break;

      case '5':        g--;        if (g<0) g=0;        break;      case '3':        b++;        if (b>255) b=255;        break;

      case '6':

        b--;

        if (b<0) b=0;

        break;

      case 'S':

        r=0; g=0; b=0;

        break;

      case 'G':

        r=255; g=255; b=255;

        break;

      case '7':        r=255; g=0; b=0;        break;      case '8':        r=255; g=50; b=0;        break;      case '9':        r=255; g=100; b=0;

        break;

      case 'L':

        r=0; g=255; b=0;

        break;

      case '*':

        r=0; g=0; b=255;

        break;

      case '0':

        r=100; g=0; b=255;

        break;

      case '#':

        r=255; g=0; b=255;

        break;

      case 'P':

        r=255; g=255; b=255;

        break;

    }

    color (r,g,b);

  }

}

void color(int r,int g,int b) {

  float lr, lg, lb;

  lr=r*180/255;

  lg=g*180/255;

  lb=b*180/255;

  analogWrite (ledR,lr);

  analogWrite (ledG,lg);

  analogWrite (ledB,lb);

}