I'd love to take a stab at finishing it up. If you have any thoughts on
what you feel is missing that you didn't get a chance to finish, let me
know. Maybe I can release a serial library we could all use.
len morgan
On 1/12/2010 12:26 PM, -= JB =- wrote:
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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