root / arduino-1.0 / libraries / Firmata / examples / AllInputsFirmata / AllInputsFirmata.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 | /* |
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13 | * This firmware reads all inputs and sends them as fast as it can. It was |
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14 | * inspired by the ease-of-use of the Arduino2Max program. |
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15 | * |
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16 | * This example code is in the public domain. |
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17 | */ |
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18 | #include <Firmata.h> |
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19 | |||
20 | byte pin; |
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21 | |||
22 | int analogValue; |
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23 | int previousAnalogValues[TOTAL_ANALOG_PINS]; |
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24 | |||
25 | byte portStatus[TOTAL_PORTS]; // each bit: 1=pin is digital input, 0=other/ignore |
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26 | byte previousPINs[TOTAL_PORTS]; |
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27 | |||
28 | /* timer variables */ |
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29 | unsigned long currentMillis; // store the current value from millis() |
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30 | unsigned long previousMillis; // for comparison with currentMillis |
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31 | /* make sure that the FTDI buffer doesn't go over 60 bytes, otherwise you |
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32 | get long, random delays. So only read analogs every 20ms or so */ |
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33 | int samplingInterval = 19; // how often to run the main loop (in ms) |
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34 | |||
35 | void sendPort(byte portNumber, byte portValue) |
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36 | { |
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37 | portValue = portValue & portStatus[portNumber]; |
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38 | if(previousPINs[portNumber] != portValue) { |
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39 | Firmata.sendDigitalPort(portNumber, portValue); |
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40 | previousPINs[portNumber] = portValue; |
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41 | } |
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42 | } |
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43 | |||
44 | void setup() |
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45 | { |
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46 | byte i, port, status; |
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47 | |||
48 | Firmata.setFirmwareVersion(0, 1); |
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49 | |||
50 | for(pin = 0; pin < TOTAL_PINS; pin++) { |
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51 | if IS_PIN_DIGITAL(pin) pinMode(PIN_TO_DIGITAL(pin), INPUT); |
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52 | } |
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53 | |||
54 | for (port=0; port<TOTAL_PORTS; port++) { |
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55 | status = 0; |
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56 | for (i=0; i<8; i++) { |
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57 | if (IS_PIN_DIGITAL(port * 8 + i)) status |= (1 << i); |
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58 | } |
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59 | portStatus[port] = status; |
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60 | } |
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61 | |||
62 | Firmata.begin(57600); |
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63 | } |
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64 | |||
65 | void loop() |
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66 | { |
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67 | byte i; |
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68 | |||
69 | for (i=0; i<TOTAL_PORTS; i++) { |
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70 | sendPort(i, readPort(i, 0xff)); |
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71 | } |
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72 | /* make sure that the FTDI buffer doesn't go over 60 bytes, otherwise you |
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73 | get long, random delays. So only read analogs every 20ms or so */ |
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74 | currentMillis = millis(); |
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75 | if(currentMillis - previousMillis > samplingInterval) { |
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76 | previousMillis += samplingInterval; |
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77 | while(Firmata.available()) { |
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78 | Firmata.processInput(); |
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79 | } |
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80 | for(pin = 0; pin < TOTAL_ANALOG_PINS; pin++) { |
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81 | analogValue = analogRead(pin); |
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82 | if(analogValue != previousAnalogValues[pin]) { |
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83 | Firmata.sendAnalog(pin, analogValue); |
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84 | previousAnalogValues[pin] = analogValue; |
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85 | } |
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86 | } |
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87 | } |
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88 | } |
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89 |