|
|
| TCP/IP over RS-485? | ||
| Author saigu Views 21 Posted at 2008/8/28 17:19 [View In Forum] | ||
|
Hi All,ydsoqxvk ydsoqxvk ydsoqxvk I was wondering if it is possible, or someone has done, to create a TCP/IP network over a 485 bus.ydsoqxvk ydsoqxvk ydsoqxvk ydsoqxvk ydsoqxvk ydsoqxvk Bye! |
| Reply No. | Replier | Total Replies 11 [View All Replies] [New Reply] | Replied at |
| 1 | naoge | It is possible. We do tftp connection qnx4 embedded system <-> Win hosh via rs-232. This problem is solved by system configuration (running inetd on net.fd qnx driver)... |
2008/8/28 17:19 |
| 2 | nnxd | free: http://www.hwgroup.cz/products/hw_vsp/index_en.html |
2008/8/28 17:19 |
| 3 | ken7976 | Yes but with rs-485 is quite different: this is a bus, rs-232 is point to point. From the practical point of view the difference is that in rs-485 there are possibilities of collisions, and you shouls manage 'hardware' addressed to identify devices... (but maybe they could be the IP) Bye! |
2008/8/28 17:19 |
| 4 | htc2498 | Well, RS-485 is quite special. It is different to RS-232 only in noise emunity (has the ability to reamplify signals in nodal stations. The amplifications are done using opamps). Correct me if I'm wrong, RS232 protocol is pretty much the same as RS485. Basically, I would take a look at the TCIP lean book for some ideas as it focusses on the protocol very much -> so you can learn how to modify it to suit the RS485. It's tricky but tell me if there is any success in it. Thanks. By the way, the book I mentioned is available for download somewhere in edaboard (someone told me). |
2008/8/28 17:19 |
| 5 | pdang | If you are using RS-485 in point-to-point mode, U can use PPP or SLIP, it is a differential version of asynchronous communication as Buddy talked. But If you are using RS-485 in multi-drop mode, U need a special arbitration or CDMA protocol in RS-485 network. |
2008/8/28 17:19 |
| 6 | z315 | Hi, I want to ask about RS485. Is that possible to use RS-485 TCP/IP connect to internet just like Local Area Network? Thereby, we can access one node at RS-485 TCP/IP network via internet or from other network which is connected together. I need an answer and reason........ Thanks |
2008/8/28 17:19 |
| 7 | rickli | 2008/8/28 17:19 | |
| 8 | ken7976 | feiutm9898: this is the same question I did. Anyway, talking about linux, maybe there is a possibility to use ham-radio tcp-ip communucation package. A radio network is very very similar to rs485 mulipoint bus network. Anyone has more infos? Bye All! |
2008/8/28 17:19 |
| 9 | chdd | 2008/8/28 17:19 | |
| 10 | gao51755775 | Open TCP stack ... http://www.embedded-electronics.nm.ru/ru/tcpip/tcpip.html |
2008/8/28 17:19 |
Total Replies 11 Thread Per Page 10
|
|||
