Profibus Master and Slave component with PIC under RS485

HGHK · Joined: 29 Jun 2010 Posts: 33

I need create Profibus Master and slave component with PIC under RS485. Who knows that:

1- is there a driver for this communication in CCS c ?
2- how i can make this protocol ?
3- what's the requirements of protocol to continuation ?

I use PIC18F452. Help me if you know please.
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FvM · Joined: 27 Aug 2008 Posts: 2337 Location: Germany

To start with a general suggestion. If you are not yet familiar with the PROFIBUS protocol, or bugdet plenty of time to learn it, give it up.

Software PROFIBUS implementations are possible with restricted speed, 19.2k should always work, 96k might,
192k hard to achieve with a PIC18. For higher speeds, you should consider a PROFIBUS ASIC, e.g.
http://www.profichip.com/products/overviewasics/?L=8

1. There's very likely no CCS driver available.
You'll find some implementatons for various processors in the Internet that must be ported, e.g. a MSP430 PB slave (in German)
http://www.mikrocontroller.net/topic/106174

2. Study the official specification EN50170 Volume 2 or secondary literature describing the protocol.

Good luck!