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'serial in'
1998\09\30@214238 by jmnewp

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I'm trying to build a little serial backpack for an LCD screen (16x1)
and am already using the external interupt for the busy flag.  anyway I
was wondering if anyone had any code for a serial in routine that used
timing delay loops.  I would like to keep my standard 4MHz crystal
instead of that wacky 3.6838 or whatever that one is.   Do the delays
have to be accurate when coming into the pic?  I have a serial out
routine that uses these loops and is slightly off, but still works with
my computer.  thanks


jon


'serial in'
1998\10\01@084205 by Joe Little
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    Checkout
    http://www.mindspring.com/~tcoonan/lcd.html


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Subject: serial in
Author:  "MARK D NEWPORT" [SMTP:spam_OUTjmnewpTakeThisOuTspamWORLDNET.ATT.NET] at IMS
Date:    9/30/98 11:50 PM


I'm trying to build a little serial backpack for an LCD screen (16x1)
and am already using the external interupt for the busy flag.  anyway I
was wondering if anyone had any code for a serial in routine that used
timing delay loops.  I would like to keep my standard 4MHz crystal
instead of that wacky 3.6838 or whatever that one is.   Do the delays
have to be accurate when coming into the pic?  I have a serial out
routine that uses these loops and is slightly off, but still works with
my computer.  thanks


jon

1998\10\01@095342 by Stefan Sczekalla-Waldschmidt

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Have a look at the Microchip Application-Note 555

WBR Stefan

Joe Little wrote:
{Quote hidden}

1998\10\01@103323 by Matt Bonner

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MARK D NEWPORT wrote:
>
> I'm trying to build a little serial backpack for an LCD screen (16x1)
> and am already using the external interupt for the busy flag.  anyway I
> was wondering if anyone had any code for a serial in routine that used
> timing delay loops.  I would like to keep my standard 4MHz crystal
> instead of that wacky 3.6838 or whatever that one is.   Do the delays
> have to be accurate when coming into the pic?  I have a serial out
> routine that uses these loops and is slightly off, but still works with
> my computer.  thanks

What controller are you using?  3.6864MHz (if that's the number you were
trying to think of) is not so wacky if you're using a PIC with an
embedded USART.

--Matt

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