node-apoxusbcan

A node.js module for Apox Controls USB-CAN devices. Most important features of this device are supported (e.g. switching to main code, and ability to send/receive CAN Bus messages).

This project has been developed with node-xanbus in mind. However, it would probably be useful for something else, hence the reason I'm releasing this module independently.

Installation

From npm:

$ npm install apoxcanusb

From source:

$ git clone https://github.com/legege/node-apoxusbcan.git
$ cd node-apoxusbcan
$ npm install

Example

To receive CAN Bus messages:

var usbcan = new ApoxUsbCan();

usbcan.on('canbusmessage', function(timestamp, rtr, id, extended, flags, data) {
  console.log('CANBus message: timestamp =', timestamp, 'rtr =', rtr, 'id =', id, 'extended =', extended, 'flags =', flags, 'data =', data);
});

usbcan.open();

usbcan.switchToMainCode(function(err) {
  if (err) {
    console.log('Failed to switch to main code:', err);
    return;
  }
});

API

ApoxUsbCan

var usbcan = new ApoxUsbCan();

usbcan.open()

usbcan.open();

• ignored if usbcan is already opened

usbcan.close()

usbcan.close();

• ignored if usbcan is not opened or already closed

usbcan.reset(callback)

usbcan.reset(function(err) {
  if (err) {
    console.log('Failed to reset:', err);
    return;
  }
});

• usbcan must be opened

usbcan.isMainCodeRunning(callback)

usbcan.isMainCodeRunning(function(err) {
  if (err) {
    console.log('Failed to determine if main code is running:', err);
    return;
  }
});

• usbcan must be opened

usbcan.switchToMainCode(callback)

usbcan.switchToMainCode(function(err, mainCodeRunning) {
  if (err) {
    console.log('Failed to switch to main code:', err);
    return;
  }
  console.log('Is main code running?', mainCodeRunning);
});

• usbcan must be opened

usbcan.getHardwareVersion(callback)

usbcan.getHardwareVersion(function(err, version) {
  if (err) {
    console.log('Failed to get hardware version:', err);
    return;
  }
  console.log('Hardware version:', version);
});

• usbcan must be opened

usbcan.getFirmwareVersion(callback)

usbcan.getFirmwareVersion(function(err, version) {
  if (err) {
    console.log('Failed to get firmware version:', err);
    return;
  }
  console.log('Firmware version:', version);
});

• usbcan must be opened

usbcan.sendBoardMessage(requestCommand)

usbcan.sendBoardMessage(0x43);

• It's not recommanded to use this method directly. The list of supported request commands is provided in source code.
• usbcan must be opened

usbcan.sendBoardMessageAndReceive(requestCommand, callback, [retryCount, responseMatcher])

usbcan.sendBoardMessageAndReceive(0x43, function(err, data) {
  if (err) {
    console.log('Failed to send board message:', err);
    return;
  }
});

• It's not recommanded to use this method directly. The list of supported request commands is provided in source code.
• retryCount is optional, but not if responseMatcher is provided
• responseMatcher is optional. Example of signature below.

function(id, responseCommand, data) {
  return id == 0xFF && data[0] == 0x63;
}

usbcan.sendCanBusMessage([rtr], canId, [extendedCanId], [canData])

usbcan.sendCanBusMessage(418053888, Buffer.from([0x00, 0xee, 0x00]));
usbcan.sendCanBusMessage(418053888, true, Buffer.from([0x00, 0xee, 0x00]));
usbcan.sendCanBusMessage(false, 418053888, true, Buffer.from([0x00, 0xee, 0x00]));

• usbcan must be opened
• rtr is optional (default: false)
• extendedCanId is optional (default: detected based on canId length)
• canData is optional (default: empty Buffer)

Event: 'canbusmessage'

function(timestamp, rtr, id, extended, flags, data) { }

Event: 'boardmessage'

function(id, command, data) { }

Event: 'error'

function(message) { }

References

• http://www.apoxcontrols.com/USBCANmenu.htm

License

(The MIT License)

Copyright (C) 2012, Georges-Etienne Legendre legege@legege.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

A different license may apply to other software included in this package, including libftdi and libusb. Please consult their respective license files for the terms of their individual licenses.