Post by thread:watching code process from one pin??

Steve Tomes wrote: > > What can you really see with just one pin??? > I have seen it mentioned several times and need all the debug help I > can > make for myself... > how can you watch the code via one pin?? It can be as simple as flashing a LED x number of times to inform you what path your code has taken, to writing to a serial LCD with your register data or any info you like to code up thay may be relevant. Yep, all on one pin. Don McKenzie spam_OUTdonTakeThisOuTdontronics.com http://www.dontronics.com Don's Download Dungeon http://www.dontronics.com/download.html For more details, send a blank message to .....infoKILLspam@spam@dontronics.com or simstickKILLspamdontronics.com or .....basicsKILLspam.....dontronics.com

At 17:19 26/12/98 +1100, you wrote: >Steve Tomes wrote: >> >> What can you really see with just one pin??? >> I have seen it mentioned several times and need all the debug help I >> can >> make for myself... >> how can you watch the code via one pin?? > >It can be as simple as flashing a LED x number of times to inform you >what path your code has taken, to writing to a serial LCD with your >register data or any info you like to code up thay may be relevant. > >Yep, all on one pin. > >Don McKenzie EraseMEdonspam_OUTTakeThisOuTdontronics.com http://www.dontronics.com I just bought a WIRZ SLI-OEM lcd driver from Don Mac just for this purpose. (Nice thingy you're got there Ben, well done!) It is well worth the time and effort to se yourself up with accessable debugging tools like this. Jim >Don's Download Dungeon http://www.dontronics.com/download.html >For more details, send a blank message to infospam_OUTdontronics.com >or @spam@simstickKILLspamdontronics.com or KILLspambasicsKILLspamdontronics.com > -------------------------------------------------------- Jim Robertson Email: RemoveMEnewfoundTakeThisOuTpipeline.com.au http://www.pipeline.com.au/users/newfound --------------------------------------------------------

>It can be as simple as flashing a LED x number of times to inform you >what path your code has taken, to writing to a serial LCD with your >register data or any info you like to code up thay may be relevant. > >Yep, all on one pin. I use a Piezo beeper on one pin, and have routines to do various kinds of chirps and whistles and beeps. Works great for me, and keeps the family pets interested as well :-) Dave Johnson

Hi Dave, Dave Johnson wrote: > > >It can be as simple as flashing a LED x number of times to inform you > >what path your code has taken, to writing to a serial LCD with your > >register data or any info you like to code up thay may be relevant. > > > >Yep, all on one pin. > > I use a Piezo beeper on one pin, and have routines to do various kinds of > chirps and whistles and beeps. Works great for me, and keeps the family > pets interested as well :-) > > Dave Johnson How about putting them onto a Web-Page, I can imagine that these routines may be of interest many Piclisters. Kind regards Stefan

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 At 01:51 PM 12/27/98 +1100, Jim Robertson wrote: >At 17:19 26/12/98 +1100, you wrote: >>Steve Tomes wrote: >>> >>> What can you really see with just one pin??? >>> I have seen it mentioned several times and need all the debug help I >>> can >>> make for myself... >>> how can you watch the code via one pin?? I wrote a little routine called "ping". You call it with a value in TEMP(a register), and it toggles a set pin the number of times asked for in temp. This makes it easy to track execution of the program through multiple steps. You need a good scope though, since the pulse train is short and fast. (125nS/pulse on an 8 Mhz AVR) -----BEGIN PGP SIGNATURE----- Version: PGP for Personal Privacy 5.5.5 Comment: Trust them, they're from the government! (NOT!) iQA/AwUBNoeqdkt+LG8vnBoNEQKTAwCcC6EWF8xkE8I4deWIxlPfZs5RzGMAoKyw 18xaLa4+1+/DAOLOwqT2kFfs =Ejd3 -----END PGP SIGNATURE-----

Hello, On Mon, 28 Dec 1998, dave vanhorn wrote: > I wrote a little routine called "ping". You call it with a value in TEMP(a > register), and it > toggles a set pin the number of times asked for in temp. This makes it easy > to track > execution of the program through multiple steps. You need a good scope > though, since > the pulse train is short and fast. (125nS/pulse on an 8 Mhz AVR) So you need a DSO, which is not an option for many... This is often used (I only had to use a single pulse to sync a scope to the internal cycle through the software though). A step further is to use an existing jumper or button as 'continue' button. The code is compiled to stop on a button read at interesting places, by calling the button poll function. Then you measure interesting values, and press the button to go on. Button debouncing has to be *exemplary* of course. The code is very short (~15 instructions, and one register for debouncing). I think that this can be permanently embedded in the firmware, with a pull-up resistor and a NC test switch connected temporarily for testing ('run' is on the L->H transition, the other transition is an intermediary state in the debouncer). Peter

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 At 08:31 PM 12/28/98 +0000, Peter L. Peres wrote: {Quote hidden}>Hello, > >On Mon, 28 Dec 1998, dave vanhorn wrote: >> I wrote a little routine called "ping". You call it with a value in TEMP(a >> register), and it >> toggles a set pin the number of times asked for in temp. This makes it easy >> to track >> execution of the program through multiple steps. You need a good scope >> though, since >> the pulse train is short and fast. (125nS/pulse on an 8 Mhz AVR) > >So you need a DSO, which is not an option for many... I wrote it for what I've got, I would expect others to do the same. It would be possible to make a two pin output for a 74HC165 shift register, so that you could output a byte to 8 LEDS (or more, it's cascadable) and a 74HC688 8 bit magnitude comparator (from radio shack) can monitor for any occurence of a specific bit-pattern. It all depends on what you've got available. -----BEGIN PGP SIGNATURE----- Version: PGP for Personal Privacy 5.5.5 Comment: Trust them, they're from the government! (NOT!) iQA/AwUBNofPMEt+LG8vnBoNEQID6QCffRiVDYFdlb7hWnIgHuj4Fvqm9CoAoI71 AWfq6OGEwzQyycuo4OuGxLWK =UE+l -----END PGP SIGNATURE-----

Jim Robertson wrote: {Quote hidden}> > At 17:19 26/12/98 +1100, you wrote: > >Steve Tomes wrote: > >> > >> What can you really see with just one pin??? > >> I have seen it mentioned several times and need all the debug help I > >> can > >> make for myself... > >> how can you watch the code via one pin?? > > > >It can be as simple as flashing a LED x number of times to inform you > >what path your code has taken, to writing to a serial LCD with your > >register data or any info you like to code up thay may be relevant. > > > >Yep, all on one pin. > > > >Don McKenzie spamBeGonedonspamBeGonedontronics.com http://www.dontronics.com > > I just bought a WIRZ SLI-OEM lcd driver from Don Mac just for this purpose. > (Nice thingy you're got there Ben, well done!) > > It is well worth the time and effort to se yourself up with accessable > debugging tools like this. > > Jim I'll bet this is leading somewhere Young Jim. :-) Don McKenzie TakeThisOuTdonEraseMEspam_OUTdontronics.com http://www.dontronics.com Don's Download Dungeon: http://www.dontronics.com/download.html Australian Electronics Ring http://www.dontronics.com/aering.html