Serial Port Woes

[-= JB =-]

I was working on a serial port stack but have been prevented from  
programming
on it for over a year now due to being poisoned and tormented in my  
own home
by a communist nazi like secret society destroying select lives in  
America.

It is unfinished but it does some basic calls.  If you are interested  
I will put it on
the Rev site and allow anyone to use or improve it.

-=>JB<=-


On Jan 12, 2010, at 7:40 AM, Len Morgan wrote:

> I'm having a lot of trouble consistently reading a serial port.   
> I'm trying to talk to a microcontroller using ModBus ASCII and the  
> basic idea is to send a request for data (about 12 bytes) and then  
> wait for an answer (about 300 bytes).  There is between a 1/4 and  
> 1/2 second delay from when I send the command and the controller  
> STARTS sending it back.
>
> I also can't get it to work at all if I open it for update (either  
> text or binary).  I have to open the com port, send the command,  
> then close the port and reopen it for read to get anything at all.
>
> I've tried "until linefeed", "until empty", "until eof", "for 1  
> line", etc. and none of them seem to work reliably.  I KNOW that a  
> response ends with a CRLF pair and there is only ever 1 "line" in a  
> response so if I could just wait until I got the LF and it happened  
> in say 3 seconds or less, I'd be happy.
>
> Any suggestions??
>
> len morgan
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