The following is a list of some of the projects and systems we've built,
or assisted in building, along with details on technologies used. If technologies
that you require are not listed, please contact us. It's likely that we've
worked on a relevant project that may not be listed below.
vxWorks and Linux VME device driver for Freescale Power PC MPC8270
microprocessor and Tundra Tsi148 VME bridge with application software
This work required building the VME device driver into the vxWorks BSP and building
a loadable Linux module (device driver). vxWorks 5.5 was used with the Tornado 2.1 development environment
and the WindRiver supplied GNU toolchain. Linux 2.6 was used for the Linux driver development. This was a hard realtime
application with messages transferred across the VME bus between two MPC8270 based adapters; one running vxWorks
and the second Linux.
vxWorks I2C and SCC 10Mbps device drivers for
Freescale Power PC MPC8270 microprocessor, along with TCP/IP sockets-based
message routing application software
This work required some amount of BSP work that targeted
vxWorks to a larger memory-based (128MB) MPC8270, along with driver
work to control I2C devices (I2C bus switch,
temperature, A/D converter, discrete I/O), with SCC driver work that
provided TCP/IP sockets to a server that stored messages transmitted
at 10Mbps. vxWorks 5.5 was used with the Tornado 2.1 development environment
and the WindRiver supplied GNU toolchain. This was a hard realtime
application with messages received at 10Mbps across all four SCCs
(an aggregate of 40Mbps), and relayed to a server across TCP/IP sockets.
Ilogix' Rhapsody Object Model Development tool was used for UML creation,
and also the Rhapsody embedded software framework was used.
Linux 2.4 Montevista 4-port Fibre Channel device driver and
configuration application
Each fibre channel runs at a rate of 1Gbps (that is one
gigabit per second). A true challenge to support four interfaces with
received messages stored on high-bandwidth SCSI disk drives. The realtime
extensions to Linux provided by Montevista went a long way in helping
achieve line rates, with Linux application software and fibre channel
ASIC device drivers running on a 400Mhz Power PC MPC8260. All software
was written in C with the Montevista provided GNU tool chain. BDI
JTAG emulators were used for debugging.
Message routing object oriented software designed in C++
routing high-speed serial HDLC messages to socket-based TCP client
operating in a vxWorks environment. vxWorks BSP configuration done
for network performance. Test harnesses done in C++, Perl and Python.
Another hard realtime application with four SCC channels
operating at 10Mbps, and messages slightly reformatted then relayed
to a storage server. vxWorks TCP/IP stack was tuned for optimal performance,
along with some device driver work for the SCC interfaces. The system
was tested with C++, Perl and Python test scripts, depending on the
test point. vxWorks 5.5 and Tornado were used.
Client/Server software object oriented design in C#/C++ using
.NET and XML technologies. Included .NET web service & remote object
interface to C# message router that routes messages to/from C++ unmanaged
specialized device drivers operating as Windows Services. UML w/design
patterns; Rhapsody+Together 4.NET tools, SQL Server; developed in
SEI CMMI Level 3 environment.
Services Oriented Architecture that leveraged Microsoft's
.NET environment with a collection of web services that provided device
control. Two servers existed in the system: one housed the web services
and a SQL database running under Windows Server 2003, and the second
housed .NET device configuration GUIs and applications that controlled
several dozen different types of radio and switching devices. The
web services communicated with the device control applications using
.NET remote objects. The web services and device configuration GUIs
were developed in C#, and the device control applications in C++.
Research project studying streaming XML Client-Server transmission
in Java and the affects of compression and alternate XML encodings
on realtime response and performance.
Research supported an ARMY Small Business Administration
proposal to provide a mechanism for reducing the amount of network
bandwidth XML messages take on military networks.
Portable SS#7 MTP1/2/3 protocol software architecture/development
supporting a variety of processor architectures.
Packaged telecommunications protocol software was the primary
product of the predecessor of e2a technology, Link Technology.
The SS#7 protocol software was developed in portable C, and was packaged
in order to be re-targeted to different processor architectures and
realtime operating systems. Protocol software is no longer a product
of e2a technology.
ISDN protocol software stack supporting operating systems
such as Windows and various embedded operating systems (e.g. Nucleus,
vxWorks, ThreadX).
Simular to the SS#7 protocol software, ISDN protocol software
was developed in portable C, and was packaged in order to be re-targeted
to different processor architectures and realtime operating systems.
A custom RTOS was also provided that could be ported to commercial
operating systems such as Nucleus, vxWorks, ThreadX and Windows.
Software architecture/development for an ISDN BRI/PRI/Switched
Digital embedded PC adapter to support H.320 multimedia video teleconferencing
desktop applications.
We ported our ISDN protocol software to an Intel 80188 microprocessor
based PC adapter that provided digital network connectivity for a
videoconferencing hardward platform. The software supported Windows,
and operated under our own custom RTOS on the 80188.
Software architecture/development for LAPB, LAPD and SS#7
protocol support for a high-performance RISC processor
We assisted a major semiconductor manufacturer by providing
software support for a proprietary RISC processor for these link layer
protocols: LAPB, LAPD and SS#7 MTP Level 2. All software was developed
in C.
Software architecture/development for an IBM PC/XT/AT ISDN
BRI embedded PC Terminal Adapter, including LAPD/Q.931 software along
with Windows device drivers
Our predecessor, Link Technology, offered an ISDN Basic
Rate PC adapter that supported data transfer and voice call processing
on Windows personal computers. The ISDN software ran completely under
Windows as the PC adapter was a shallow adapter; i.e. it had no on-board
processor.
Software architecture/development of a realtime embedded
water sample collection system used for pollution monitoring
In order to provide EPA compliance, a major chemical company
contracted an engineering firm to build a water collection system
that had programmable collection sizes and time frequencies. The hardware
was based on an Intel 8032 microcontroller, and the software was written
in C, and contained a custom cyclic scheduler.
Software architecture/development for an Oracle-based database
server under Open VMS on a VAX-Alpha cluster-based Message Switch
with User Interface design
This work was done to support a major telecommunications
company's mail and fax message switch. The software was developed
in C, along with SQL stored procedures that interfaced with an Oracle
database engine.
