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158
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1 /*
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2 D0 <---------
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3 D1 lcd rw
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4 D2 <---------
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5 D3 ir out -----
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6 D4 lcd 4
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7 D5 lcd 5
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8 D6 lcd 6
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9 D7 lcd 7
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10 D8 lcd rs
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11 D9 lcd en
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12 D10 lcd backlight
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13 D11 tbd <------------
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14 D12 motion in <--------
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15 D13 debug led <--------
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16
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17 */
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153
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18 #include <Arduino.h>
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19 #include <LiquidCrystal.h>
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157
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20 #include "DFR_Key.h"
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21 #include "IRremote.h"
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153
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22
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159
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23 #define motionIn 12
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24
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25
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157
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26 // see http://www.dfrobot.com/image/data/DFR0009/LCDKeypad%20Shield%20V1.0%20SCH.pdf
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153
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27 #define I2C_ADDR 0x27 // I2C address of PCF8574A
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157
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28 #define BACKLIGHT_PIN 10
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153
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29 #define En_pin 9
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30 #define Rw_pin 1
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31 #define Rs_pin 8
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32 #define D4_pin 4
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33 #define D5_pin 5
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34 #define D6_pin 6
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35 #define D7_pin 7
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36
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157
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37 LiquidCrystal lcd(Rs_pin, Rw_pin, En_pin, D4_pin, D5_pin, D6_pin, D7_pin, BACKLIGHT_PIN, POSITIVE);
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38 DFR_Key keypad;
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153
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39
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157
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40 byte backlightStandard = 0;
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41 byte backlightCurrent = 0;
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42 byte backlightKeypressBoost = 30;
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43
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44 int lastKey = -1;
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45 int lastUnsentKeydown = -1;
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46 uint16_t steps = 0;
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47 uint16_t stepDelayPerBrightnessFade = 2048;
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48
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158
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49 // uses pin 3
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157
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50 IRsend irsend;
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51
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52 void sendnec(byte addr, byte cmd) {
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159
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53 uint32_t w =
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54 ((uint32_t(addr) << 24) & 0xff000000) |
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55 (((~uint32_t(addr)) << 16) & 0x00ff0000) |
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56 ((uint32_t(cmd) << 8) & 0x0000ff00) |
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57 ((~uint32_t(cmd)) & 0x000000ff);
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157
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58 irsend.sendNEC(w, 32);
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59 }
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153
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60
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61 void setup(void) {
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159
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62 pinMode(motionIn, INPUT);
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63 digitalWrite(motionIn, 1);
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64
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153
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65 Serial.begin(115200);
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157
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66 keypad.setRate(10);
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67 lcd.begin(16,2);
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153
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68 }
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69
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157
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70
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153
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71 void loop() {
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157
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72 while (Serial.available() <= 2) {
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73 int localKey = keypad.getKey();
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74 if (localKey != SAMPLE_WAIT) {
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75 if (localKey != lastKey) {
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76 if (lastKey == 0) {
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77 backlightCurrent = min(255, backlightStandard +
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78 backlightKeypressBoost);
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79 lastUnsentKeydown = localKey;
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80 }
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81 lastKey = localKey;
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82 }
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83 }
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84
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85 if (backlightCurrent > backlightStandard) {
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86 steps++;
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87 if (steps % stepDelayPerBrightnessFade == 0) {
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88 backlightCurrent--;
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89 }
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90 } else if (backlightCurrent < backlightStandard) {
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91 backlightCurrent = backlightStandard;
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92 }
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93 lcd.setBacklight(backlightCurrent);
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94 }
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95 byte i = Serial.read();
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96 if (i != 0x60) {
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97 return;
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98 }
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99 i = Serial.read(); // command
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100 if (i == 0) { // get status
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101 Serial.print('{');
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102 if (lastUnsentKeydown != -1) {
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103 Serial.print("\"keyDown\":");
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104 Serial.print(lastUnsentKeydown);
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105 Serial.print(",");
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106 lastUnsentKeydown = -1;
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107 }
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108 Serial.print("\"slider1\":"); Serial.print(analogRead(1));
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109 Serial.print(",\"slider2\":"); Serial.print(analogRead(2));
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110 Serial.print(",\"slider3\":"); Serial.print(analogRead(3));
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111 Serial.print(",\"slider4\":"); Serial.print(analogRead(4));
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159
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112 Serial.print(",\"motion\":"); Serial.print(digitalRead(motionIn));
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157
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113 Serial.print("}\n");
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114 } else if (i == 1) { // write text
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115 while (Serial.available() < 3) NULL;
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116 byte row = Serial.read();
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117 byte col = Serial.read();
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118 byte nchars = Serial.read();
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119 char buf[32];
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120 char *p=buf;
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121 while (nchars--) {
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122 while (Serial.available() < 1) NULL;
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123 *(p++) = Serial.read();
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124 }
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125 *p = 0;
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126 lcd.setCursor(row, col);
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127 lcd.print(buf);
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128 } else if (i == 2) { // set backlight
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129 while (Serial.available() < 1) NULL;
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130 backlightStandard = Serial.read();
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159
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131 } else if (i == 3) { // IR NEC protocol
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132 while (Serial.available() < 2) NULL;
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133 byte addr = Serial.read();
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134 sendnec(addr, Serial.read());
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157
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135 } else {
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136 // unknown command
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137 }
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153
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138 }
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