Hi Guys, I accidentally deleted the email where some mentioned he can post a schematic on building a buffer for the logic analyzer. I would like to build one. Could that person be so kind to me the schematic to my private email address as follow; techy@yahoo.com Thanks in advance for your help. BTW, one question. Can I use FIFO chip say, CY7C429-20PC, from Cypress to build a buffer ? cheers, Davis Larry Bradley wrote: I put all the relevant files in one directory, then did allowio digitrac.exe /a I've not tried it from a batch file. At 08:22 AM 12/5/2003 -0600, you wrote: >how, exactly do you get allowio to execute digitrac? I have tried running a >batch file, and also changing the shortcut. Allowio runs, but digitrac >never starts up. > >thanks, > >Jim > >-----Original Message----- >From: pic microcontroller discussion list >[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Larry Bradley >Sent: Friday, December 05, 2003 08:08 >To: PICLIST@MITVMA.MIT.EDU >Subject: Re: [PIC]: Logic Analyzer > > >Another chap posted a link. AllowIO works quite well. I found that I had to >tell it to use all ports (the /a option), rather than just the 3F8 for the >printer port. > >What you do with AllowIO is have it execute the digitrace program. Works >well. > >I'm going to hook up an octal buffer as an isolator between the parallel >port cable and the PIC pins. The parallel port pins have a 4.7k resistor >from +5 to the pin, and a transistor to ground. Thus your circuit being >monitored will have some voltage applied. I stick a 1k resistor in series, >which works OK, but I think the buffer is a better idea. > >Have fun > >At 09:00 PM 12/4/2003 -0500, you wrote: > >Larry Bradley wrote: > >>I noticed this in the PIC logic analyzer thread. Needing a logic analyzer > >>to debug a software SPI routine I was writing, I tried it the PC logic > >>analyzer noted below. It works like a charm. I'm using it on an 800 mHz >Win > >>2K machine, and it seems to sample at about 2 mHz at its fastest. This was > >>too slow to handle the 20mHz 18F1320 I was using, so I just reconfigured > >>the 1320 to use the internal RC OSC at a lower speed and I was able to > >>monitor the waveforms and debug my code. > >> > >>It support 8 channels. To use it, you just wire up a connector to your > >>PC's parallel port, and connect to the PIC pins in question via a 1K > >>resistor. > >> > >> > >>>Is the point of this project to have a logic analyser (in which case > >>>the "parallel port logic analyser" might be quicker/easier, > >>>http://www.xs4all.nl/~jwasys/old/diy2.html > > > >Hi Larry, > >I have the same setup as you have but opening the program gives an > >"Privileged instruction" message. > > > >On the above site, the author says: > >"Run on Win2000 NT XP with interrupted acquisition, using the allowio > >driver." But the link to this driver is broken. > >Any suggestions? > > > >Gaston > > > >-- > >http://www.piclist.com hint: The list server can filter out subtopics > >(like ads or off topics) for you. See http://www.piclist.com/#topics > >Larry Bradley >Orleans (Ottawa), Ontario, CANADA > >-- >http://www.piclist.com hint: The PICList is archived three different >ways. See http://www.piclist.com/#archives for details. > >-- >http://www.piclist.com hint: The PICList is archived three different >ways. See http://www.piclist.com/#archives for details. Larry Bradley Orleans (Ottawa), Ontario, CANADA -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. --------------------------------- Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.