?
Solved

USB to RS485

Posted on 2008-06-24
10
Medium Priority
?
295 Views
Last Modified: 2010-10-26
I am looking for a USB to 485 converter that has a programmbale processor/MCU/PIC between the 485 and the USB so that I can program the DLL portion of a protocol into the converter. This protocol will then only pass/acept Application layer messages from the USB side.
0
Comment
Question by:Chipkin_com
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
10 Comments
 
LVL 15

Expert Comment

by:f-king
ID: 21884536
0
 

Author Comment

by:Chipkin_com
ID: 21885085
No. These devices do not have a programmable processor between the ports.
0
 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22174537
If RS485 is converted to RS232 then, by virtue of there being COM ports on a regular pc, (and some low-level programming) the pc can be used to act as intermediary between the USB and RS485.
0
The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

 

Author Comment

by:Chipkin_com
ID: 22282806
That solution doesnt work. We want to implement the Data Link portion of the protocol in the device so that it is not sensitive to the timing and variable resouce loading of the computer. The Data link portion of the protocol is responsible for passing the token, token recovery,  wrapping and sending application layer queries, unwrapping and extracting application layer data from response. The device must do all this. The only data that passes from/to the computer is the application layer stuff.
0
 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22284061
In which case:  If BlackBox don't do it - probably it doesn't exist (unless you were prepared to get out your soldering iron):-

http://www.blackbox.com/Catalog/Category.aspx?cid=308,1431,1442
0
 

Accepted Solution

by:
Chipkin_com earned 0 total points
ID: 22461501
No one has a solution. I have designed and built my own now.
Advertising Information removed.

Open in new window

0
 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22462779

>unless you were prepared to get out your soldering iron
 
I see you decided to try out my suggestion ;-))
 
 
'scuse the format of this comment, can't post in regular text box at the mo' for some reason

Open in new window

0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This paper addresses the security of Sennheiser DECT Contact Center and Office (CC&O) headsets. It describes the DECT security chain comprised of “Pairing”, “Per Call Authentication” and “Encryption”, which are all part of the standard DECT protocol.
If you're a modern-day technology professional, you may be wondering if certifications are really necessary. They are. Here's why.
Articles on a wide range of technology and professional topics are available on Experts Exchange. These resources are written by members, for members, and can be written about any topic you feel passionate about. Learn how to best write an article t…
Saved searches can save you time by quickly referencing commonly searched terms on any topic. Whether you are looking for questions you can answer or hoping to learn about a specific issue, a saved search can help you get the most out of your time o…
Suggested Courses

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question