root / arduino-1.0 / libraries / Firmata / examples / AllInputsFirmata / AllInputsFirmata.ino @ 58d82c77
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/* |
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* Firmata is a generic protocol for communicating with microcontrollers |
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* from software on a host computer. It is intended to work with |
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* any host computer software package. |
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* |
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* To download a host software package, please clink on the following link |
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* to open the download page in your default browser. |
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* |
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* http://firmata.org/wiki/Download |
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*/ |
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|
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/* |
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* This firmware reads all inputs and sends them as fast as it can. It was |
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* inspired by the ease-of-use of the Arduino2Max program. |
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* |
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* This example code is in the public domain. |
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*/ |
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#include <Firmata.h> |
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byte pin; |
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int analogValue; |
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int previousAnalogValues[TOTAL_ANALOG_PINS]; |
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byte portStatus[TOTAL_PORTS]; // each bit: 1=pin is digital input, 0=other/ignore |
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byte previousPINs[TOTAL_PORTS]; |
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|
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/* timer variables */ |
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unsigned long currentMillis; // store the current value from millis() |
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unsigned long previousMillis; // for comparison with currentMillis |
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/* make sure that the FTDI buffer doesn't go over 60 bytes, otherwise you |
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get long, random delays. So only read analogs every 20ms or so */ |
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int samplingInterval = 19; // how often to run the main loop (in ms) |
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|
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void sendPort(byte portNumber, byte portValue) |
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{ |
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portValue = portValue & portStatus[portNumber]; |
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if(previousPINs[portNumber] != portValue) { |
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Firmata.sendDigitalPort(portNumber, portValue); |
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previousPINs[portNumber] = portValue; |
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} |
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} |
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void setup() |
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{ |
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byte i, port, status; |
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Firmata.setFirmwareVersion(0, 1); |
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for(pin = 0; pin < TOTAL_PINS; pin++) { |
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if IS_PIN_DIGITAL(pin) pinMode(PIN_TO_DIGITAL(pin), INPUT); |
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} |
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|
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for (port=0; port<TOTAL_PORTS; port++) { |
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status = 0; |
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for (i=0; i<8; i++) { |
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if (IS_PIN_DIGITAL(port * 8 + i)) status |= (1 << i); |
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} |
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portStatus[port] = status; |
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} |
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Firmata.begin(57600); |
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} |
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void loop() |
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{ |
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byte i; |
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for (i=0; i<TOTAL_PORTS; i++) { |
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sendPort(i, readPort(i, 0xff)); |
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} |
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/* make sure that the FTDI buffer doesn't go over 60 bytes, otherwise you |
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get long, random delays. So only read analogs every 20ms or so */ |
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currentMillis = millis(); |
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if(currentMillis - previousMillis > samplingInterval) { |
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previousMillis += samplingInterval; |
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while(Firmata.available()) { |
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Firmata.processInput(); |
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} |
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for(pin = 0; pin < TOTAL_ANALOG_PINS; pin++) { |
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analogValue = analogRead(pin); |
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if(analogValue != previousAnalogValues[pin]) { |
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Firmata.sendAnalog(pin, analogValue); |
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previousAnalogValues[pin] = analogValue; |
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} |
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} |
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} |
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} |
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