Interrupt driven Buffered Serial Input


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  1. #1
    Join Date
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    I tried your code, and now I tried the one above and still does not work
    Code:
    ReadSerial:
       DataRec var byte[5] : DataRec = 0
       
       While CounterA <= 55
            HSERIN [serdata2]        'save serial port data right away
            if serdata2 = $13 THEN
               i = 0
               KP = 1
            ENDIF
            if KP = 1 then
               IF i=5 THEN
                  SerData(CounterA) = serdata2
                  CounterA = CounterA + 1
                  KP = 0
               endif
               i = i + 1
            endif
       wend
    
       FOR COUNTERB=42 to COUNTERA
            SEROUT2 SerWRT,16416,[hex2 SerDATA(COUNTERB), 10, 13]
            NEXT COUNTERB
       Goto ReadReadyLoop
    I tried this one as well and it doesn't work either:
    Code:
        SERIN2 [WAIT($20), SKIP 4, serdata2]
    PS: it doesn't work it's like the pic is not reading the data fast enough. It is supposed to read the data from a keyboard that than sends data over a serial link at 19200 (not inverted).

    All the above codes work if I press a key once per second or so, but they don't work any faster. Anybody can tell me why
    Last edited by johnmiller; - 12th May 2007 at 08:23.

  2. #2
    skimask's Avatar
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    I think I can reasonably assume that what you posted isn't all of your code that you are trying to make work.
    And if it is...well, where's the beef?
    Post the whole thing if you want any useful help...

  3. #3
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    Well this is the only part where I have problems and I don't think pasting 80 pages will do any good
    I really don't understand what's wrong with my code

  4. #4
    skimask's Avatar
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    Quote Originally Posted by johnmiller View Post
    I don't think pasting 80 pages will do any good
    I really don't understand what's wrong with my code
    And I guess neither will we...

  5. #5
    Join Date
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    here's the plan... shrink the whole thing and test with a simple program... simple main loop (led blinking or else) + USART INT. Then post the whole new thing.
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.

  6. #6
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    Thumbs up

    Ok. I managed to do my work with this (after a lot of struggle) but it works. Hope this code will help somebody in the future

    PS: Thanks guys for the help

    Code:
    ReadSerial:
       DataRec var byte[6]
       for counterB=0 to 5
           DataRec(counterB)=0
           next counterB
       
       While CounterA <= 254
            HSERIN [serdata2]
            DataRec(0)=DataRec(1)
            DataRec(1)=DataRec(2)
            DataRec(2)=DataRec(3)
            DataRec(3)=DataRec(4)
            DataRec(4)=DataRec(5)
            DataRec(5)=serdata2
            
            IF DataRec(0)=$20 AND DataRec(2)="K" AND DataRec(3) = "E" AND DataRec(4) = "Y" THEN
               ' Parse serial data (command entered)
               SerData(CounterA) = serdata2
               CounterA = CounterA + 1
            endif
       wend
    
       FOR COUNTERB=0 to COUNTERA
            SEROUT2 SerWRT,16416,[SerDATA(COUNTERB), 10, 13]
            NEXT COUNTERB
       Goto MainLoop

  7. #7
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    While / Wend was in the bug list right?

    Seems good to me.
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.

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