Re: [ts-7000] Re: Capturing serial port to text

[David <>]

Here is the code I use and to gather GPS data. Seems to work well.  The port open code (gps.h) is in the files area.
Hope that helps. David

fd = open_gpsport(); //opens the comm port for use
if(fp==NULL) printf("Can not open GPS port\n");
if (fp != NULL)
{
while (1)
{
ioctl(fd,FIONREAD,&bytes); //indicates there is data to read
if (bytes > 0)
{
read(fd,buf,512);
printf("%s\n", buf);
}


yoobb wrote:

--- In .com, "yoobb" m("...","yoobb");"><> wrote:
>
> Does anybody have any ideas on how to easily capture serial port input (either COM1 or
> COM2) to a text file? Ideally, I would like the TS-7200 to continuously direct serial port
input
> to a text file, appending to the same file (or a new file) with each restart.
>
> The only idea I have so far is to install minicom and set up a boot script that starts
minicom
> and directs it to a text file automatically.
>
> TIA!
>

Thanks to both people who've replied so far!

For now, I am successfully redirecting COM2 to a log file. The device file is /dev/ttyAM1. I
found out (on this board) that I first have to comment out the line in the file /etc/inittab
containing "getty" and "ttyAM1". Apparently, getty is a program that, by default, uses the
serial port. Commenting out this line frees up the serial port for my own use.

I then added a boot script to /etc/rc2.d, naming it "S99datarecord". The script contains:

stty -F /dev/AM1 ispeed 4800
stty -F /dev/AM1 ospeed 4800
stty -F /dev/AM1 igncr
cat /dev/AM1 >> /home/me/log

The first two lines set the desired speed. The third line says to ignore carriage returns.
Before I put in the igncr, I was getting double-spaced output. Apparently, my device uses
<CR><LF> to end a line (like DOS) and the serial port must've been converting the CR to a
second LF. igncr throws out the extraneous CR.

I also had to set executable permissions: chmod +x S99datarecord.

This is crude, but it works. The only problem is the data capture occurs midstream and
stops midstream, so the first and last lines of data are partial lines. If I were to use the
text file as is, I would have to strip out the the first and last lines of every session.

I'll explore more sophisticated methods as time permits. The previous response lists
some very promising suggestions.

Thanks to all!

-- 
David..........
You have been on the computer to long when,
You start tilting your head sideways to smile :-) 

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