--- In Eddie Dawydiuk <> wrote:
>
> Hello,
>
> > We're recently testing the RS-485 functionality on the SER4 boards and
> > I'm running into trouble. While reading the documentation, I find:
> >
> > There is a control bit (See Section 5) that must be set for proper
> > RS-485 or RS-422
> > operation. This bit must be set once and does not need to be updated.
> > This enable bit
> > solves a problem when RTS is asserted during boot. The BIOS and some
> > Operating
> > Systems toggle RTS during boot, which could cause it to "jam" the
> > RS-485 bus.
> >
> > To set this bit, we need the base address but where can we find that
> > one? I was hoping to find a solution in readmeter.c which I found in
> > the example code but it didn't help me pretty much.
> >
> > Could someone help me?
>
> The TS-Ser4 shows up in I/O space. 8 bit I/O space starts at
> 0x11E0_0000, just add the offset you have the board jumpered for. You
> can find documentation on what the offsets are (based upon the jumpers)
> in the TS-Ser4 manual.
>
> http://www.embeddedarm.com/Manuals/TS-SER4.pdf
>
> --
> Best Regards,
> ________________________________________________________________
> Eddie Dawydiuk, Technologic Systems | voice: (480) 837-5200
> 16610 East Laser Drive Suite 10 | fax: (480) 837-5300
> Fountain Hills, AZ 85268 | web: www.embeddedARM.com
>
Eddie,
Thanks for the answer.
After setting the correct bit I get 0xC0 at base+3 which looks correct
to me. But still I'm stucked somewhere.
I'm trying to connect COMA (RS232) through a blackbox convertor to
COMC (RS485). When I send on COMA using `cat` I see TX flashing but I
don't receive anything on COMC. Trying to send on COMC using `cat`, I
don't receive anything on COMA.
Do you have anymore suggestion?
Kind regards,
wimpunk
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