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1 #include <Arduino.h>
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2 #include <LiquidCrystal.h>
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3
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4 #define I2C_ADDR 0x27 // I2C address of PCF8574A
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5 #define BACKLIGHT_PIN 3
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6 #define En_pin 9
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7 #define Rw_pin 1
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8 #define Rs_pin 8
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9 #define D4_pin 4
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10 #define D5_pin 5
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11 #define D6_pin 6
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12 #define D7_pin 7
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13
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14 LiquidCrystal twilcd(Rs_pin, Rw_pin, En_pin, D4_pin, D5_pin, D6_pin, D7_pin, BACKLIGHT_PIN, POSITIVE);
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15
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16 #define debugLed 13
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17
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18
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19 void setup(void) {
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20 int i;
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21 pinMode(debugLed, OUTPUT);
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22
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23 Serial.begin(115200);
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24
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25 twilcd.begin(16,2);
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26 twilcd.setBacklight(HIGH);
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27 twilcd.home();
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28 //1234567890123456
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29 //I2C/TWI BackPack
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30 twilcd.print("hello world");
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31 // ana read and display
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32 while (1) {
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33 while (Serial.available() <= 2) {
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34 }
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35 i = Serial.read();
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36 if (i != 0x60) {
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37 continue;
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38 }
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39 i = Serial.read(); // command
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40 if (i == 0) { // set strip: 0x60 0x00 <numPixels * 3 bytes>
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41 digitalWrite(debugLed, 1);
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42 delay(1000);
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43 digitalWrite(debugLed, 0);
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44 } else {
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45 // unknown command
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46 }
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47 }
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48 }
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49
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50 void loop() {
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51 }
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