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-rw-r--r--libraries/Firmata/Firmata.cpp445
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diff --git a/libraries/Firmata/Firmata.cpp b/libraries/Firmata/Firmata.cpp
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-/*
- Firmata.cpp - Firmata library
- Copyright (C) 2006-2008 Hans-Christoph Steiner. All rights reserved.
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- See file LICENSE.txt for further informations on licensing terms.
-*/
-
-//******************************************************************************
-//* Includes
-//******************************************************************************
-
-#include "WProgram.h"
-#include "HardwareSerial.h"
-#include "Firmata.h"
-
-extern "C" {
-#include <string.h>
-#include <stdlib.h>
-}
-
-//******************************************************************************
-//* Support Functions
-//******************************************************************************
-
-void sendValueAsTwo7bitBytes(int value)
-{
- Serial.print(value & B01111111, BYTE); // LSB
- Serial.print(value >> 7 & B01111111, BYTE); // MSB
-}
-
-void startSysex(void)
-{
- Serial.print(START_SYSEX, BYTE);
-}
-
-void endSysex(void)
-{
- Serial.print(END_SYSEX, BYTE);
-}
-
-//******************************************************************************
-//* Constructors
-//******************************************************************************
-
-FirmataClass::FirmataClass(void)
-{
- firmwareVersionCount = 0;
- systemReset();
-}
-
-//******************************************************************************
-//* Public Methods
-//******************************************************************************
-
-/* begin method for overriding default serial bitrate */
-void FirmataClass::begin(void)
-{
- Serial.begin(57600);
- blinkVersion();
- delay(300);
- printVersion();
-}
-
-/* begin method for overriding default serial bitrate */
-void FirmataClass::begin(long speed)
-{
- blinkVersion();
-#if defined(__AVR_ATmega128__) // Wiring
- Serial.begin((uint32_t)speed);
-#else
- Serial.begin(speed);
-#endif
- delay(300);
- printVersion();
- printFirmwareVersion();
-}
-
-// output the protocol version message to the serial port
-void FirmataClass::printVersion(void) {
- Serial.print(REPORT_VERSION, BYTE);
- Serial.print(FIRMATA_MAJOR_VERSION, BYTE);
- Serial.print(FIRMATA_MINOR_VERSION, BYTE);
-}
-
-void FirmataClass::blinkVersion(void)
-{
- // flash the pin with the protocol version
- pinMode(VERSION_BLINK_PIN,OUTPUT);
- pin13strobe(FIRMATA_MAJOR_VERSION, 200, 400);
- delay(300);
- pin13strobe(2,1,4); // separator, a quick burst
- delay(300);
- pin13strobe(FIRMATA_MINOR_VERSION, 200, 400);
-}
-
-void FirmataClass::printFirmwareVersion(void)
-{
- byte i;
-
- if(firmwareVersionCount) { // make sure that the name has been set before reporting
- startSysex();
- Serial.print(REPORT_FIRMWARE, BYTE);
- Serial.print(firmwareVersionVector[0]); // major version number
- Serial.print(firmwareVersionVector[1]); // minor version number
- for(i=2; i<firmwareVersionCount; ++i) {
- sendValueAsTwo7bitBytes(firmwareVersionVector[i]);
- }
- endSysex();
- }
-}
-
-void FirmataClass::setFirmwareNameAndVersion(const char *name, byte major, byte minor)
-{
- const char *filename;
- char *extension;
-
- // parse out ".cpp" and "applet/" that comes from using __FILE__
- extension = strstr(name, ".cpp");
- filename = strrchr(name, '/') + 1; //points to slash, +1 gets to start of filename
- // add two bytes for version numbers
- if(extension && filename) {
- firmwareVersionCount = extension - filename + 2;
- } else {
- firmwareVersionCount = strlen(name) + 2;
- filename = name;
- }
- firmwareVersionVector = (byte *) malloc(firmwareVersionCount);
- firmwareVersionVector[firmwareVersionCount] = 0;
- firmwareVersionVector[0] = major;
- firmwareVersionVector[1] = minor;
- strncpy((char*)firmwareVersionVector + 2, filename, firmwareVersionCount - 2);
- // alas, no snprintf on Arduino
- // snprintf(firmwareVersionVector, MAX_DATA_BYTES, "%c%c%s",
- // (char)major, (char)minor, firmwareVersionVector);
-}
-
-//------------------------------------------------------------------------------
-// Serial Receive Handling
-
-int FirmataClass::available(void)
-{
- return Serial.available();
-}
-
-
-void FirmataClass::processSysexMessage(void)
-{
- switch(storedInputData[0]) { //first byte in buffer is command
- case REPORT_FIRMWARE:
- printFirmwareVersion();
- break;
- case STRING_DATA:
- if(currentStringCallback) {
- byte bufferLength = (sysexBytesRead - 1) / 2;
- char *buffer = (char*)malloc(bufferLength * sizeof(char));
- byte i = 1;
- byte j = 0;
- while(j < bufferLength) {
- buffer[j] = (char)storedInputData[i];
- i++;
- buffer[j] += (char)(storedInputData[i] << 7);
- i++;
- j++;
- }
- (*currentStringCallback)(buffer);
- }
- break;
- default:
- if(currentSysexCallback)
- (*currentSysexCallback)(storedInputData[0], sysexBytesRead - 1, storedInputData + 1);
- }
-}
-
-void FirmataClass::processInput(void)
-{
- int inputData = Serial.read(); // this is 'int' to handle -1 when no data
- int command;
-
- // TODO make sure it handles -1 properly
-
- if (parsingSysex) {
- if(inputData == END_SYSEX) {
- //stop sysex byte
- parsingSysex = false;
- //fire off handler function
- processSysexMessage();
- } else {
- //normal data byte - add to buffer
- storedInputData[sysexBytesRead] = inputData;
- sysexBytesRead++;
- }
- } else if( (waitForData > 0) && (inputData < 128) ) {
- waitForData--;
- storedInputData[waitForData] = inputData;
- if( (waitForData==0) && executeMultiByteCommand ) { // got the whole message
- switch(executeMultiByteCommand) {
- case ANALOG_MESSAGE:
- if(currentAnalogCallback) {
- (*currentAnalogCallback)(multiByteChannel,
- (storedInputData[0] << 7)
- + storedInputData[1]);
- }
- break;
- case DIGITAL_MESSAGE:
- if(currentDigitalCallback) {
- (*currentDigitalCallback)(multiByteChannel,
- (storedInputData[0] << 7)
- + storedInputData[1]);
- }
- break;
- case SET_PIN_MODE:
- if(currentPinModeCallback)
- (*currentPinModeCallback)(storedInputData[1], storedInputData[0]);
- break;
- case REPORT_ANALOG:
- if(currentReportAnalogCallback)
- (*currentReportAnalogCallback)(multiByteChannel,storedInputData[0]);
- break;
- case REPORT_DIGITAL:
- if(currentReportDigitalCallback)
- (*currentReportDigitalCallback)(multiByteChannel,storedInputData[0]);
- break;
- }
- executeMultiByteCommand = 0;
- }
- } else {
- // remove channel info from command byte if less than 0xF0
- if(inputData < 0xF0) {
- command = inputData & 0xF0;
- multiByteChannel = inputData & 0x0F;
- } else {
- command = inputData;
- // commands in the 0xF* range don't use channel data
- }
- switch (command) {
- case ANALOG_MESSAGE:
- case DIGITAL_MESSAGE:
- case SET_PIN_MODE:
- waitForData = 2; // two data bytes needed
- executeMultiByteCommand = command;
- break;
- case REPORT_ANALOG:
- case REPORT_DIGITAL:
- waitForData = 1; // two data bytes needed
- executeMultiByteCommand = command;
- break;
- case START_SYSEX:
- parsingSysex = true;
- sysexBytesRead = 0;
- break;
- case SYSTEM_RESET:
- systemReset();
- break;
- case REPORT_VERSION:
- Firmata.printVersion();
- break;
- }
- }
-}
-
-//------------------------------------------------------------------------------
-// Serial Send Handling
-
-// send an analog message
-void FirmataClass::sendAnalog(byte pin, int value)
-{
- // pin can only be 0-15, so chop higher bits
- Serial.print(ANALOG_MESSAGE | (pin & 0xF), BYTE);
- sendValueAsTwo7bitBytes(value);
-}
-
-// send a single digital pin in a digital message
-void FirmataClass::sendDigital(byte pin, int value)
-{
- /* TODO add single pin digital messages to the protocol, this needs to
- * track the last digital data sent so that it can be sure to change just
- * one bit in the packet. This is complicated by the fact that the
- * numbering of the pins will probably differ on Arduino, Wiring, and
- * other boards. The DIGITAL_MESSAGE sends 14 bits at a time, but it is
- * probably easier to send 8 bit ports for any board with more than 14
- * digital pins.
- */
-
- // TODO: the digital message should not be sent on the serial port every
- // time sendDigital() is called. Instead, it should add it to an int
- // which will be sent on a schedule. If a pin changes more than once
- // before the digital message is sent on the serial port, it should send a
- // digital message for each change.
-
- // if(value == 0)
- // sendDigitalPortPair();
-}
-
-
-// send 14-bits in a single digital message (protocol v1)
-// send an 8-bit port in a single digital message (protocol v2)
-void FirmataClass::sendDigitalPort(byte portNumber, int portData)
-{
- Serial.print(DIGITAL_MESSAGE | (portNumber & 0xF),BYTE);
- Serial.print(portData % 128, BYTE); // Tx bits 0-6
- Serial.print(portData >> 7, BYTE); // Tx bits 7-13
-}
-
-
-void FirmataClass::sendSysex(byte command, byte bytec, byte* bytev)
-{
- byte i;
- startSysex();
- Serial.print(command, BYTE);
- for(i=0; i<bytec; i++) {
- sendValueAsTwo7bitBytes(bytev[i]);
- }
- endSysex();
-}
-
-void FirmataClass::sendString(byte command, const char* string)
-{
- sendSysex(command, strlen(string), (byte *)string);
-}
-
-
-// send a string as the protocol string type
-void FirmataClass::sendString(const char* string)
-{
- sendString(STRING_DATA, string);
-}
-
-
-// Internal Actions/////////////////////////////////////////////////////////////
-
-// generic callbacks
-void FirmataClass::attach(byte command, callbackFunction newFunction)
-{
- switch(command) {
- case ANALOG_MESSAGE: currentAnalogCallback = newFunction; break;
- case DIGITAL_MESSAGE: currentDigitalCallback = newFunction; break;
- case REPORT_ANALOG: currentReportAnalogCallback = newFunction; break;
- case REPORT_DIGITAL: currentReportDigitalCallback = newFunction; break;
- case SET_PIN_MODE: currentPinModeCallback = newFunction; break;
- }
-}
-
-void FirmataClass::attach(byte command, systemResetCallbackFunction newFunction)
-{
- switch(command) {
- case SYSTEM_RESET: currentSystemResetCallback = newFunction; break;
- }
-}
-
-void FirmataClass::attach(byte command, stringCallbackFunction newFunction)
-{
- switch(command) {
- case STRING_DATA: currentStringCallback = newFunction; break;
- }
-}
-
-void FirmataClass::attach(byte command, sysexCallbackFunction newFunction)
-{
- currentSysexCallback = newFunction;
-}
-
-void FirmataClass::detach(byte command)
-{
- switch(command) {
- case SYSTEM_RESET: currentSystemResetCallback = NULL; break;
- case STRING_DATA: currentStringCallback = NULL; break;
- case START_SYSEX: currentSysexCallback = NULL; break;
- default:
- attach(command, (callbackFunction)NULL);
- }
-}
-
-// sysex callbacks
-/*
- * this is too complicated for analogReceive, but maybe for Sysex?
- void FirmataClass::attachSysex(sysexFunction newFunction)
- {
- byte i;
- byte tmpCount = analogReceiveFunctionCount;
- analogReceiveFunction* tmpArray = analogReceiveFunctionArray;
- analogReceiveFunctionCount++;
- analogReceiveFunctionArray = (analogReceiveFunction*) calloc(analogReceiveFunctionCount, sizeof(analogReceiveFunction));
- for(i = 0; i < tmpCount; i++) {
- analogReceiveFunctionArray[i] = tmpArray[i];
- }
- analogReceiveFunctionArray[tmpCount] = newFunction;
- free(tmpArray);
- }
-*/
-
-//******************************************************************************
-//* Private Methods
-//******************************************************************************
-
-
-
-// resets the system state upon a SYSTEM_RESET message from the host software
-void FirmataClass::systemReset(void)
-{
- byte i;
-
- waitForData = 0; // this flag says the next serial input will be data
- executeMultiByteCommand = 0; // execute this after getting multi-byte data
- multiByteChannel = 0; // channel data for multiByteCommands
-
-
- for(i=0; i<MAX_DATA_BYTES; i++) {
- storedInputData[i] = 0;
- }
-
- parsingSysex = false;
- sysexBytesRead = 0;
-
- if(currentSystemResetCallback)
- (*currentSystemResetCallback)();
-
- //flush(); //TODO uncomment when Firmata is a subclass of HardwareSerial
-}
-
-
-
-// =============================================================================
-// used for flashing the pin for the version number
-void FirmataClass::pin13strobe(int count, int onInterval, int offInterval)
-{
- byte i;
- pinMode(VERSION_BLINK_PIN, OUTPUT);
- for(i=0; i<count; i++) {
- delay(offInterval);
- digitalWrite(VERSION_BLINK_PIN, HIGH);
- delay(onInterval);
- digitalWrite(VERSION_BLINK_PIN, LOW);
- }
-}
-
-
-// make one instance for the user to use
-FirmataClass Firmata;
-
-