FullDuplexSerial Assistance Needed

Brian Carpenter

Ok, how to start.·
I am currently using the FullSerialDuplex object from the object exchange and i am sending data (strings) out the .tx· i have been doing this successfully for a while now.· But what i want to do is also recieve data back.· I have done this in one program.

    repeat until ser.rx == "#"                  ' wait for start char
    
    ch := sock.rxtime(250)                       ' get response code
    
    if ch <> "0"

but all this gets me is one character.·

What if i want to recieve data like·· #1042,123,1513,1232,1220$

I was thinking that the # would let the rx know that it is the beginning and the $ would signify the end?



how do i get all this stored into a variable. or better yet, parse between comma's and store several variables.

i am stumped and would love to see an example

Thanks



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It's Only A Stupid Question If You Have Not Googled It First!!

Mike Green

I think the FullDuplexSerialPlus object from the Object Exchange includes routines to convert numeric values to numbers and you could use that as a starting point. The routine in FullDuplexSerialPlus uses a carriage return to delimit numbers, but you could change the routine to use any of several characters to mark the end of the numbers.

Post Edited (Mike Green) : 8/20/2009 5:09:56 AM GMT

SRLM

It looks like you'll need to change (in FullDuplexSerialPlus.spin) line 176 to compare to the value of 44 (instead of 0, after the equal sign). Then do the same thing with line 140 (except that it's replacing a $0D). From there, you should be able to just call GetDec. Of course, it would mean that if you also wanted to get strings you'd have to made some changes (probably an OR or two). Once you have that, something like this might work:

repeat until ser.rx == "#"

num1 := ser.getdec
num2 := ser.getdec
...

edit: you'll probably have to have an OR on those two lines, since there are multiple possibilities for end of number ( "," and "$"). On a side note, if you have control over the serial stream you may want to put the $ first, just to be consistent with NMEA GPS strings. Also, if you do have control and you always know how many numbers are transmitted in a string, you might as well end it with another ','.

Post Edited (SRLM) : 8/20/2009 5:51:54 AM GMT

Nick Mueller

rtxtime returns a value >= 0 when a char is available, -1 if it timed out.
IIRC!

Nick

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Brian Carpenter

Mike i searched for FullDuplexSerialPlus and found nothing. Am i missing something?

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It's Only A Stupid Question If You Have Not Googled It First!!

Mike Green

Well, it's "Extended FullDuplexSerial": obex.parallax.com/objects/31/.

Shows you the value of browsing through the index rather than searching. If at first you don't succeed, go browse. It takes less than a minute!

Brian Carpenter

Thanks Mike, I did find the extended FullDuplexSerial. I wanted to make sure i was looking at the one you were making reference to. Thanks again

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It's Only A Stupid Question If You Have Not Googled It First!!

SRLM

What happened to FDSP? I have a copy on my machine by that very name, and I'm pretty sure I got it through downloading.

StefanL38

FullDuplexSerialPlus FDS+ FDX+ is included in the setupfile of the propellertool but after installing it it is someway hided in the subsubdir

C:\Program Files\Parallax Inc\Propeller Tool v1.2.6\Examples\PE Kit\6 - Objects Lab

in similar cases do a search for *plus*.spin in directory "Propeller Tool v1.2.6" including all subdirectories.
By the way and somehow OT: the tool Instant File Name Search
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After scanning searching for a filename is done in less than 1 second ! never wanna miss this tool again

best regards
Stefan

Post Edited (StefanL38) : 8/21/2009 9:26:19 AM GMT