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Richard Erlacher
09/17/08 16:47
  09/17/08 16:48

Read: 734 times
Denver, Co

#158340 - now ... I\'ve never done this ... but ...
Responding to: Jan Waclawek's previous message
It seems to me that it would be a reasonable challenge to take the "free" microsoft 'C' development tools and the drivers provided by, say, FTDI, and use the 'C' compiler to produce display software and one of the ubiquitous USB devices from that manufacturer to interface a device like a logic analyzer/oscilloscope based on a CPLD or FPGA, together with a couple of flash-converters in the case of the oscilloscope, and it should be quite straightforward producing a useable display.

I've produced that sort of thing under DOS, though it's been a while. The LA was just an event-trigered sampler, rather than one having complex triggering capability. I've built complex trigering circuits for logic analyzers using discrete logic and I've built small ones using an oscilloscope as a display. It's clearly possible.

As for the display, ... if you can build a simple CRT refresh memory, as one used with microcomputers back in the '70's, particularly with TV-type displays as was common practice back then, all you have to do is to sample to a RAM and substitute a task-specific character generator.

Being Windows-daunted, I've never attempted it ... <sigh> ... Maybe one of these days ...


List of 29 messages in thread
Logic Analyzer      Per Guldmann      09/04/08 06:31      
   another option      Erik Malund      09/04/08 07:38      
   From the embedded muse...      Jon Ledbetter      09/04/08 08:19      
      that Jack is a King      Erik Malund      09/04/08 09:33      
   I bought one...      Dave Brooks      09/04/08 12:40      
      Exactly what analyzer did you buy?      Per Westermark      09/04/08 12:52      
         the 34 channel one...      Dave Brooks      09/04/08 13:02      
            Link      Andy Neil      09/05/08 01:29      
      in the job where I work now...      Jan Waclawek      09/04/08 13:05      
         logic analyzer      Per Guldmann      09/08/08 14:25      
            lucky you      Erik Malund      09/08/08 14:37      
         Logic Analyzer projects      Andy Peters      09/08/08 18:45      
            use the FPGA memory for trigger FIFO      Richard Erlacher      09/08/08 20:34      
            thst's it!      Jan Waclawek      09/17/08 00:36      
               do you mean "PC-software" or "Windows software"      Richard Erlacher      09/17/08 04:31      
                  Both.      Jan Waclawek      09/17/08 12:00      
                     now ... I\'ve never done this ... but ...      Richard Erlacher      09/17/08 16:47      
                        MinGW + wxWidgets      Per Westermark      09/17/08 23:00      
   miniLA      Jan Waclawek      09/07/08 07:54      
      great info      Jecksons Ben      09/07/08 21:43      
         Look for old PC motherboard cache RAM        Richard Erlacher      09/07/08 23:04      
            Thank you      Jecksons Ben      09/08/08 18:50      
         replacement        Jan Waclawek      09/08/08 12:54      
            Thank's      Jecksons Ben      09/08/08 19:13      
   Found???      Jecksons Ben      09/16/08 22:01      
      Those are hard to work with      Richard Erlacher      09/17/08 04:34      
         Correct...but.      Jecksons Ben      09/17/08 21:32      
   Hi      Nomana Intekhab Hadi (Ruh      11/15/08 16:30      
      this defines ...      Andy Peters      11/19/08 14:31      

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