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1 | /*
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2 | * Firmata is a generic protocol for communicating with microcontrollers
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3 | * from software on a host computer. It is intended to work with
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4 | * any host computer software package.
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5 | *
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6 | * To download a host software package, please clink on the following link
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7 | * to open the download page in your default browser.
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8 | *
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9 | * http://firmata.org/wiki/Download
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10 | */
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11 |
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12 | /* Supports as many analog inputs and analog PWM outputs as possible.
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13 | *
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14 | * This example code is in the public domain.
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15 | */
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16 | #include <Firmata.h>
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17 |
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18 | byte analogPin = 0;
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19 |
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20 | void analogWriteCallback(byte pin, int value)
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21 | {
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22 | if (IS_PIN_PWM(pin)) {
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23 | pinMode(PIN_TO_DIGITAL(pin), OUTPUT);
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24 | analogWrite(PIN_TO_PWM(pin), value);
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25 | }
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26 | }
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27 |
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28 | void setup()
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29 | {
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30 | Firmata.setFirmwareVersion(FIRMATA_FIRMWARE_MAJOR_VERSION, FIRMATA_FIRMWARE_MINOR_VERSION);
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31 | Firmata.attach(ANALOG_MESSAGE, analogWriteCallback);
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32 | Firmata.begin(57600);
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33 | }
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34 |
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35 | void loop()
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36 | {
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37 | while (Firmata.available()) {
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38 | Firmata.processInput();
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39 | }
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40 | // do one analogRead per loop, so if PC is sending a lot of
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41 | // analog write messages, we will only delay 1 analogRead
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42 | Firmata.sendAnalog(analogPin, analogRead(analogPin));
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43 | analogPin = analogPin + 1;
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44 | if (analogPin >= TOTAL_ANALOG_PINS) analogPin = 0;
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45 | }
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46 |
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