labjack-nodejs/lib/driver_wrapper.js

nodejs library for using the LabJackM library

/**
 * Low level LJM dynamic library interface as provided by ffi.
 *
 * @author Chris Johnson (chrisjohn404, LabJack Corp.)
 */



var ref;
try {
    ref = require('ref');       //Load variable type module
} catch(err) {
	ref = require('ref-napi');
}
var fs = require('fs');         //Load File System module
var jsonConstants = require('ljswitchboard-modbus_map');
var driver_const = require('ljswitchboard-ljm_driver_constants');

var ljm;
var ffi_liblabjack;

// Require the ljm-ffi library.
var ljm_ffi = require('ljm-ffi');

// Link to the ljm shared library (.so, .dylib, .dll)
ljm = ljm_ffi.load();
ffi_liblabjack = ljm_ffi.loadRaw();

// Get the loaded version of LJM
var ljmLibraryVersionData = ljm.LJM_ReadLibraryConfigS('LJM_LIBRARY_VERSION', 0);
var ljmLibraryVersion = ljmLibraryVersionData.Value;

var openAllIsLoaded = false;
// console.log('ljmLibraryVersion', ljmLibraryVersion);
if(ljmLibraryVersion >= 1.1200) {
    openAllIsLoaded = true;
}

var getHandlesIsLoaded = false;
if(ljmLibraryVersion >= 1.1300) {
	getHandlesIsLoaded = true;
}

exports.getDriver = function() {
    return ffi_liblabjack;
};
exports.getConstants = function() {
    return jsonConstants.getConstants();
};
exports.parseRegisterNameString = function (name) {
    return parseRegisterNameString(name);
};
exports.hasOpenAll = function() {
    return openAllIsLoaded;
};
exports.hasGetHandles = function() {
	return getHandlesIsLoaded;
}

/*
LJM_SEND_RECEIVE_TIMEOUT_MS
LJM_OPEN_TCP_DEVICE_TIMEOUT_MS
LJM_LOG_MODE
LJM_LOG_LEVEL
LJM_LIBRARY_VERSION
LJM_ALLOWS_AUTO_MULTIPLE_FEEDBACKS
LJM_ALLOWS_AUTO_CONDENSE_ADDRESSES
LJM_OPEN_MODE
LJM_NAME_CONSTANTS_FILE
LJM_ERROR_CONSTANTS_FILE
LJM_LOG_FILE
LJM_CONSTANTS_FILE
LJM_MAX_LOG_FILE_SIZE
LJM_STREAM_TRANSFERS_PER_SECOND
LJM_RETRY_ON_TRANSACTION_ID_MISMATCH
*/