root / arduino-1.0 / libraries / Firmata / examples / AnalogFirmata / AnalogFirmata.ino @ 58d82c77
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1 | 58d82c77 | Tom Mullins | /* |
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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 | |||
12 | /* This firmware supports as many analog ports as possible, all analog inputs, |
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13 | * four PWM outputs, and two with servo support. |
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14 | * |
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15 | * This example code is in the public domain. |
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16 | */ |
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17 | #include <Servo.h> |
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18 | #include <Firmata.h> |
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19 | |||
20 | /*============================================================================== |
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21 | * GLOBAL VARIABLES |
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22 | *============================================================================*/ |
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23 | |||
24 | /* servos */ |
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25 | Servo servo9, servo10; // one instance per pin |
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26 | /* analog inputs */ |
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27 | int analogInputsToReport = 0; // bitwise array to store pin reporting |
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28 | int analogPin = 0; // counter for reading analog pins |
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29 | /* timer variables */ |
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30 | unsigned long currentMillis; // store the current value from millis() |
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31 | unsigned long previousMillis; // for comparison with currentMillis |
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32 | |||
33 | |||
34 | /*============================================================================== |
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35 | * FUNCTIONS |
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36 | *============================================================================*/ |
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37 | |||
38 | void analogWriteCallback(byte pin, int value) |
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39 | { |
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40 | switch(pin) { |
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41 | case 9: servo9.write(value); break; |
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42 | case 10: servo10.write(value); break; |
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43 | case 3: |
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44 | case 5: |
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45 | case 6: |
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46 | case 11: // PWM pins |
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47 | analogWrite(pin, value); |
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48 | break; |
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49 | } |
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50 | } |
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51 | // ----------------------------------------------------------------------------- |
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52 | // sets bits in a bit array (int) to toggle the reporting of the analogIns |
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53 | void reportAnalogCallback(byte pin, int value) |
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54 | { |
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55 | if(value == 0) { |
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56 | analogInputsToReport = analogInputsToReport &~ (1 << pin); |
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57 | } |
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58 | else { // everything but 0 enables reporting of that pin |
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59 | analogInputsToReport = analogInputsToReport | (1 << pin); |
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60 | } |
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61 | // TODO: save status to EEPROM here, if changed |
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62 | } |
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63 | |||
64 | /*============================================================================== |
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65 | * SETUP() |
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66 | *============================================================================*/ |
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67 | void setup() |
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68 | { |
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69 | Firmata.setFirmwareVersion(0, 2); |
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70 | Firmata.attach(ANALOG_MESSAGE, analogWriteCallback); |
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71 | Firmata.attach(REPORT_ANALOG, reportAnalogCallback); |
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72 | |||
73 | servo9.attach(9); |
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74 | servo10.attach(10); |
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75 | Firmata.begin(57600); |
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76 | } |
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77 | |||
78 | /*============================================================================== |
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79 | * LOOP() |
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80 | *============================================================================*/ |
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81 | void loop() |
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82 | { |
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83 | while(Firmata.available()) |
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84 | Firmata.processInput(); |
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85 | currentMillis = millis(); |
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86 | if(currentMillis - previousMillis > 20) { |
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87 | previousMillis += 20; // run this every 20ms |
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88 | for(analogPin=0;analogPin<TOTAL_ANALOG_PINS;analogPin++) { |
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89 | if( analogInputsToReport & (1 << analogPin) ) |
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90 | Firmata.sendAnalog(analogPin, analogRead(analogPin)); |
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91 | } |
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92 | } |
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93 | } |