I got it working with the code I had before...
I didn't have the pins isolated from the connection to my pc.
I isolated the RS-485+ / RS-485- lines and it is working.
Thanks again for your help Peter.
-Rob
--- In "nxtcomputing" <> wrote:
>
> I tried setting dio pin 27 using:
> $setdiopin 27 1
>
> That didn't seem to make any difference...
> Are there specific port settings for RS-485 that I may have missed?
>
> Thanks for any help,
> Rob
>
> --- In "PeterElliot" <egroups@> wrote:
> >
> > Hi,
> >
> > I don't have a TS-7500, so take this with a pinch of salt.
> >
> > Looking at the TS-752 schematic, the RS485 TX Enable is connected to DIO_27
> > on the 40 pin connector.
> >
> > From the code below, I can't see the control of the TX enable pin being
> > specified, which would result in the data being sent to the chip, but not
> > being sent out into the world.
> >
> > I don't know how you'd control the TX Enable, but setting DIO_27 high prior
> > to sending and setting it low afterwards may help - but I expect the FPGA
> > would automatically control this line if it was told that the port were
> > RS485...
> >
> > Hope this helps,
> >
> > PJE
> >
> >
> >
> > --- In "nxtcomputing" <rwright@> wrote:
> > >
> > > I am trying to communicate over the RS-485 port on a TS-7500 with TS-752
> > > board. I have connected pins 1 and 6 on the DB-9M port of the TS-752
> > > board to a RS-458 device. I have tried to configure the ports using the
> > > following...
> > >
> > > #xuartctl --port 0 --server --speed 9600
> > > ttyname=/dev/pts/0
> > > #xuartctl --port 1 --server --speed 9600
> > > ttyname=/dev/pts/1
> > >
> > > then in a program i tried to send over the both of the ports with no
> > > luck...
> > >
> > > #include <iostream>
> > > #include <stdio.h>
> > > #include <stdlib.h>
> > > #include <string>
> > > #include "convert.h"
> > > using namespace std;
> > > #include <sys/types.h>
> > > #include <sys/stat.h>
> > > #include <fcntl.h>
> > > #include <termios.h>
> > > #define BAUDRATE B9600
> > > #define _POSIX_SOURCE 1
> > > #define FALSE 0
> > > #define TRUE 1
> > > volatile int STOP=FALSE;
> > >
> > > int main(void) {
> > > int fd;
> > > struct termios oldtio, newtio;
> > > fd = open("/dev/pts/0", O_RDWR | O_NOCTTY);
> > > if (fd <0) {
> > > perror("/dev/pts/0");
> > > exit(-1);
> > > }
> > >
> > > tcgetattr(fd, &oldtio); //save current settings
> > > bzero(&newtio, sizeof(newtio)); //clear new port settings
> > >
> > > newtio.c_cflag = BAUDRATE | CS8 | CLOCAL | CREAD | PARENB;
> > > newtio.c_iflag = IGNPAR | IGNBRK;
> > > newtio.c_oflag = OPOST;
> > >
> > > newtio.c_lflag = 0;
> > > tcflush(fd, TCIFLUSH);
> > > tcsetattr(fd, TCSANOW, &newtio);
> > >
> > > char data[50];
> > > sprintf(data,"%c0101%cAC11R1C1A1P%c",0x02,0x1b,0x04);
> > >
> > > write(fd,&data[0],18);
> > > printf("sent on serial line: %s\n",&data[0]);
> > > tcsetattr(fd, TCSANOW, &oldtio); //restore old setting
> > > }
> > >
> > > any ideas?
> > >
> >
>
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