Hello,

as subject: I use a small routine which is capable to send Morse codes
with 15 WPM to a port, which is connected to a buzzer. The main advantage
is, there is no need of any technical mean (DMM, scope, etc) to decipher
the messages. The Morse codes are stored one byte/character, the upper 3
bits are length, and the lower 5 (I know it is a limitation) are the dit
and dah signals: dit is 0 and dah is 1.

Regards,

Imre


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On Thu, 28 Mar 2002, Al Williams wrote:

> A clever idea. I'm spoiled because I have an ICE and a logic analyzer.
> However, years ago, we'd put trace points on I/O we weren't using at the
> time so you could look at them with a scope and see how far your program
> got before it bombed. On one board, we had a R2R D/A and as long as you
> weren't using it, it was handy to put a "trace number" on the D/A so you
> could hook a voltmeter to the output and see where you were.
>
> Also, the pulsing single line is handy if you have an event counter, so
> long as you remember to reset the event counter each time :-)
>
> Speaking of logic analyzers, I've had a little project I've been working
> on off and on. It waits for a trigger, stores 16 clocked samples, and
> then displays them on one channel of an oscope. Only 4 bits though
> because of the size of the PLD I'm using.
>
> You can see some pictures of it at
> http://wd5gnr.virtualave.net/cgi-bin/TWiki/view.pl/Main/LogicScope (use
> UserID= GuestUser and password= guest). This will probably turn up
> somewhere as an article soon. Of course, you could do this with a PIC,
> but it would be hard to get the potential clock speed out of it.
>
> Al Williams
> AWC
> * 8 channels of PWM
> http://www.al-williams.com/awce/pak5.htm
>
>
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Thomas McGahee
> > Sent: Thursday, March 28, 2002 3:57 PM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: [PIC]: Simple debuggung techniques
> >
> >
> > For doing testing on PIC circuits that are under development,
> > I often send out a little data stream on any available i/o line.
>
> --
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> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>
>

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