[ts-7000] RS485

["Yan Seiner" <>]

I am trying to get RS485 running on one of the expansion card ports. 
I have the 4 port serial card.  My RS485 device is hooked up to COM C,
which has the RS485 option enabled ( the jumper is on.)

When I try to turn on RS485 using

   if(proto == RS485HD) {
        int mcr, ret;
        mcr = AUTO485HD;
                //mcr = AUTO485FD //for full duplex
        ret = ioctl (fd, TIOC_SBCS485, &mcr);
        if(Mb_verbose)
                printf("setting RS parameters returned %d: fd: %d, request: %d,
value: %d\n",ret, fd, TIOC_SBCS485, mcr);
        }

I always get back a -1 status, meaning that the ioctl call failed.

setting ok:
device        /dev/ttyS2
speed         9600
data bits     8
stop bits     1
parity        0
ioctl failed: Invalid argument
setting RS parameters returned -1: fd: 3, request: 1074025585, value: 4

I can't figure out why this is failing....  Anyone have RS485 running
on the expansion card?  Could someone shed some light on this?

Thanks,

--Yan





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