Re: [ts-7000] rs485 on ts7260...

[Mike Ingle <>]

I am not an expert, but my 2cents:  rs485 is a shared tx rx scheme with drivers which require a direction control bit.  Essentially, you ware always a listener (I think) until you enable a tx direction bit then you are a talker. So in addition to writing the tx rx data you also must manage (ioctls?) the listen/talk state.  I hope this helps,

Mike

On Jun 4, 2010, at 5:18 AM, Jim Jackson wrote:

 

I'm trying to speak to a single RS485 device connected to the second port
of a TS7260 with the RS485 option.

I've never dealt with rs485 before. Am I right in thinking that, if a
single device is connected full duplex, then I should just treat,
programming-wise, the interface as if it was an rs232 port?
'cos I've done that and am getting nothing. I'm getting the guys that did
the hardware to double check their wiring to the COM2 header.

If any RS485 expert could give any hints/advice it would be much
appreciated.

Jim
p.s. the rs232 code works fine on /dev/ttyTS0 (com3) and on the serial port
of my development machine.

__._,_.___

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: =Email Delivery: Digest | m("yahoogroups.com?subject","ts-7000-fullfeatured");=Change Delivery Format: Fully Featured">Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | =Unsubscribe

__,_._,___