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After supplying all your  Embedded Development Tool needs for 42 years
 Computer Solutions Ltd and its web shop are now closed.



 Having reached the grand old age of 75 it is time to relax and fulfil other ambitions.

 Its been an exciting ride with you, our customers, often on the bleeding edge of technology
 and I thank you for your friendship, your trust, and your orders.

Stay well        I wish you all success in your future projects.

Chris Stephens.



     But what to do with the web site ?  It has taken >12 man years of work to create a repository of knowledge on many aspects of the art and science of embedded microprocessor development and even after closing the shop it still gets over 4,000 visitors per month.  So as a service to my customers I have decide to keep it live providing my technical insights on the products and then redirecting viewers to sites where they can purchase the items they used to buy from us. Follow the link   "Home"

       The  "Information zone"  consists of articles produced as background tutorials on subjects of interest to those designing new products.  As different CPUs have became available this has lead to new development techniques and in particular to new ways of communicating between nodes.


Home Information Zone

Programmable CAN Data Acquisition Units


This page describes our Programmable CAN Controllers - we have a number of units that require the user to program the modules in C.  This gives much more control and flexibility but requires a greater investment in time to program the unit.  A GCC Compiler, GDB development environment and sample programs are supplied to cover the most basic functions and get you started.

Intelligent Routers

RS232 Interface
GPS and Gyroscope GPRS Controller


It's a rather artificial separation but on the  Peak Configurable Data Acquisition page we show systems that are configured via simple PC based Windows Applications.  The advantage of this configuration process is that no programming expertise is required and configurations may be rapidly created and changed.  They all need a PEAK-CAN interface for the initial loading of fresh configurations but after that can of course be read and written to by any valid CAN interface.

Small Industrial I/O modules

Large Industrial  I/O Modules

Thermocouple Unit

Advanced Router and Data Logger



Intelligent Router

The PCAN-Router is a module that accesses two separate CAN networks. It uses a programmable ARM microcontroller to process the data it sees on these two channels , so that incoming CAN messages can be evaluated, converted, and filtered individually, in order to transmit appropriately customized CAN messages to the other network.

The PCAN-Router is shipped with demonstration firmware which performs one-to-one forwarding of the CAN messages between the two CAN networks at 500 kbit/s.   The source code for this application is included on the CD-ROM supplied with the units. It is possible to load your own firmware onto the module via CAN by means of a pre installed boot loader.

The module is mounted in an aluminium casing, and is shipped in versions with two Sub-D connectors, or a screw-terminal strip.  A power supply 7-26V DC is required.

The router can be fitted with an additional LIN channel if required.

Although designed as a Router these unit could ( within the limits of their single chip micros) be used as a network controller for simple systems


A version is available in a DIN Rail package see PCAN-Router DR which is user programmable

And a 4 channel version see PCAN-Router Pro  which can be configured with a Windows app or can be user programmable


  CAN router


RS232 Interface

PCAN-RS-232 is a programmable module for putting an RS-232 device (Printer or perhaps an old design of A/D converter) onto a CAN network. The work of of formatting the data to be sent to or taken from the CAN messages is done via a NXP LPC21 series microcontroller.

Using the supplied library and the Yagarto GNU ARM toolchain (contains the GNU Compiler Collection GCC for C and C++), custom firmware can be created and then transferred to the module. This gives a whole range of options for formatting, manipulation, evaluation, filtering, and routing of the data traffic.

On delivery the PCAN-RS-232 is provided with demo firmware that routes from CAN to RS-232 and vice versa. It allows the configuration of the data to be transfered as well as the hardware serial control commands. The corresponding source code is included as an example.

  CAN router


CAN GPS and associated functions

A GPS, compass, accelerometer, and gyroscope all included in a single module that may be interrogated by the CAN bus. It has a satellite receiver, a magnetic field sensor, an accelerometer, and a gyroscope. The sampled data can be transmitted on the CAN bus and logged on the internal memory card. The data processing is performed by a NXP LPC4000 microcontroller.

Using the supplied library and the Yagarto GNU ARM toolchain (contains the GNU Compiler Collection, GCC for C and C++), custom firmware can be created and then transferred to the module. This gives a whole range of options for manipulation, evaluation, filtering, and routing of the data traffic.

On delivery, the PCAN-GPS is provided with demo firmware that transmits the raw data of the sensors periodically on the CAN bus. The source code of the demo firmware as well as further programming examples are included.

  CAN router




The PCAN-GPRS Link is a development platform for telematic applications. An API allows simple integration of functions within a specific application environment. The PCAN-GPRS Link supports the evaluation of FMS and Bus FMS data (Fleet Management System) for which it produces consumption related vehicle data.

There are two programmable microcontrollers within the unit which process internal vehicle data and run the GPRS.

The DTCO info interface also allows the connection and processing of a digital tacho with access to information such as driver identification and driver working time. The GPS module can be used to determine location and output the direction of travel.

There is an optional expansion to allow additional data to be processed, output and recorded. These include temperature and movement sensors, barcode scanners, RFID readers, displays, and WiFi or Bluetooth connections.

The PCAN-GPRS Link has ECE type approval (E1), which guarantees its problem–free use in vehicles.

The PCAN-GPRS Link is supplied with a programming example in the form of a Linux daemon for x86 Debian. This daemon receives the data from the PCAN-GPRS Link and writes them to a mySQL database. Data can then be visualized using a php script based on Google Maps* and AJAX. Output includes the FMS and OBD-2 data and positions of all modules connected to the database.

* Use of Google Maps is subject to the licensing terms and conditions as specified by Google Inc. and is only free of charge within limits.

  • Dualcore ARM7 (core) and ARM9 (GPRS) system
  • Recording of all data to internal flash memory (maximum 32 GB)
  • E1 type approval
  • Operating voltage: 6 – 32 V DC
  • Extended operating temperature range from -40 to 85 °C (-40 to 185 °F)
  • U-blox 5 GPS module with 50 channels and over 1 million correlators.
    Position accuracy 2.5 m CEP at -130 dBm
  • Data transfer via GPRS or CSD
  • Wavecom GPRS class 10 quad-band modem
  • Handling of DTCO and FMS data
  • Handling of OBD-2 data via CAN (complete PID support not ensured)
  • CiAź 447 and J1939 protocol support on request
  • Firmware update via GPRS
  • Two High-speed CAN channels (ISO 11898-2) with bit rates of 40 kbit/s to 1 Mbit/s.
  • Two digital inputs and one digital output
  • One UART V.24





For price of Programmable CAN Modules visit our Web Shop



For more Information on :-

CAN interfaces USB PCI, PC104, PC, PCMCIA, Express, Parallel port, ISA, RS232, LIN
Free PEAK CAN Software The PCAN-Basic DLL, a range of OS drivers and PCAN-View bus diagnostic package are all supplied free with all Peak interfaces.
PCAN-Explorer A sophisticated CAN bus logging and diagnostic package for use with complex applications including GUI and J1939 support.
PCAN I/O Modules CAN modules with configurable digital and analogue I/O.
Other PEAK Software Software is available to support FMS, CAN simulation, CANOpen, Linux and an Event driven API for time critical multi-tasked operation,
Cables Pre-built high performance CAN cables, converters, extenders and termination 
CAN Tutorial Our technical summary for those new to CAN 

Home Information Zone
Computer Solutions Ltd
87 Briar Road,  Shepperton,  Middx,  TW17 0JB
Telephone: +44 (0) 77 4342 2526   
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