We distribute protocol stacks and protocol analyser tool of Warwick Control Technologies Ltd. for Japanese companies, and provide relating engineering services.
Link to Warwick Control Technologies Ltd's web page

■ Products we distribute and support 　

• DeviceNet Library
• SAE J1939 Library
• NEMA2000 Library
• X-Analyser(Protocol Analyser Tool)

Features of NMEA2000/SAE J1939 Protocol Stack

• Development site license
• J1939 Netwok Address Management
• J1939 TP(BAM, CMDT), and ISO 11783 ETP
• NMEA2000 Fast Packet Protocol

DeviceNet Protocol Stack

Their DeviceNet stack is sold without warranty or support.
We also sell their stack, which has been improved for porting to new MCUs, some enhancements and corresponding new test tools, with our own warranty.
Below are some of our own extensions:

• Supports 32bit MCUs for example, Renesas RX series, EC-1, TI TM4C1290N, ...
• Supports message body format 2 in addition to format 0
• Adjustments with the latest testing tool of ODVA