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???
03/06/06 06:56
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 		 #111332 - Buying, building and Writing..
Responding to: ???'s previous message
Thank you all for your replies.

Jan:
Anyway, its okay, I would check some other sources. But the miniLA project was quite impressive.

Richard:
Thanks for your replies. You have given me so much inputs and options. I would process them soon. The exact problem now is not technical, but time. If I start this LA part as a project, then the main project (Sensor networking using CC2420) will get lesser priority. I am really running short of time, thats why I am hesitating in any new venture till the main project gets over.

Andy said:
The hardest thing is writing a useful host (PC or Mac OS X) program! I was thinking that I can send the data over in VCD (Verilog change dump) format and parse it and display waveforms using GTKWave, and a little custom program sets up triggers and so forth. But last week I was poking through LabView and there's a LabView control that does exactly what I want, so I may go that route


Exactly, Andy. Last night, I built a data capture hardware. It has an Atmega8535 running at 8MIPS, with RS232 of 56000 Baud.

I could read a byte(from a 8bit port), and send it thru UART in less than 100usec. I havent used any sort of buffering(just was checking the idea), but the problem was on the other side:

I used serial caputure terminal called 'Bray's terminal', and it takes a lot of time for the capture program to manipulate this much data.

Then I also tried to send the port status only when any one of the inputs is changing, and I have to evaluate that program today.

Thank you all for your valuable inputs.

Cheers,
Vignesh


List of 77 messages in thread
TopicAuthorDate
Parallel port Logic Analyser            01/01/70 00:00      
   Maybe I can help ...            01/01/70 00:00      
      Details            01/01/70 00:00      
         Well ... YES!            01/01/70 00:00      
            Oops!            01/01/70 00:00      
               another option            01/01/70 00:00      
               ideas            01/01/70 00:00      
               Try a DOS box            01/01/70 00:00      
                  When things are not going on my way..            01/01/70 00:00      
                     well            01/01/70 00:00      
                        Cost?            01/01/70 00:00      
                        cost            01/01/70 00:00      
                           Options            01/01/70 00:00      
                              ok well            01/01/70 00:00      
                              miniLA            01/01/70 00:00      
                                 Sorry!            01/01/70 00:00      
                                    I don't sell            01/01/70 00:00      
                                    If you want something you can build ...            01/01/70 00:00      
                                 MiniLA?            01/01/70 00:00      
                                    Buying, building and Writing..            01/01/70 00:00      
                                       You've got to decide ...            01/01/70 00:00      
                                       great start!            01/01/70 00:00      
                                          AVR!            01/01/70 00:00      
                                             realterm            01/01/70 00:00      
                                          But they're not reall fast enough            01/01/70 00:00      
                                             Cheat!            01/01/70 00:00      
                                                only if it gains you something            01/01/70 00:00      
                                                   to LA or not to LA            01/01/70 00:00      
                                                      I once made one            01/01/70 00:00      
                                                         cost of time... and price of learning...            01/01/70 00:00      
                                                            there is no such thing            01/01/70 00:00      
                                                               1MHz sampling            01/01/70 00:00      
                                                                  it's not that simple            01/01/70 00:00      
                                                                     architecture            01/01/70 00:00      
   Not sure how it compares            01/01/70 00:00      
      not very useful            01/01/70 00:00      
   there is no way in hades that a "paralle            01/01/70 00:00      
      how fast?            01/01/70 00:00      
      not so fast there, Erik            01/01/70 00:00      
         PCI LPT vs. onboard            01/01/70 00:00      
            Seems a mite slow!            01/01/70 00:00      
         yes, but part of the "software" is Windo            01/01/70 00:00      
            You're right, of course,            01/01/70 00:00      
               all good and well            01/01/70 00:00      
                  wotizit            01/01/70 00:00      
                  That's it, exactly!            01/01/70 00:00      
                     Won't work either            01/01/70 00:00      
                        will work            01/01/70 00:00      
                           yes, but not the way you think            01/01/70 00:00      
                              re FIFO use            01/01/70 00:00      
                              USB+FIFO: the simplest way            01/01/70 00:00      
                                 Have you considered this?            01/01/70 00:00      
                                    simplicity            01/01/70 00:00      
                                       yes, but it's not deterministic            01/01/70 00:00      
                                          YES YES YES            01/01/70 00:00      
                                             What do you mean "forget about..."            01/01/70 00:00      
                                                quick'n'dirty            01/01/70 00:00      
                                                   there are countries with low labor cost            01/01/70 00:00      
                                                      labour cost?            01/01/70 00:00      
                                                   Even if it's 768 TB, it's too small            01/01/70 00:00      
                        think about it some more            01/01/70 00:00      
                     10MHz?            01/01/70 00:00      
                        Not the USB, the FIFO!            01/01/70 00:00      
                           USB logic analyzer            01/01/70 00:00      
                              It's just a transfer mechanism            01/01/70 00:00      
            Zigbee timing            01/01/70 00:00      
               if a byte is 32 then a bit is 4 and you            01/01/70 00:00      
               arrrrrrrrrrrrgh and stuff,just use pci            01/01/70 00:00      
                  Yes, well, what did you expect?            01/01/70 00:00      
                     better mousetrap            01/01/70 00:00      
               I must have been more precise            01/01/70 00:00      
                  but WHEN?            01/01/70 00:00      
                     2420 interface details            01/01/70 00:00      
                        Focus on your current needs            01/01/70 00:00      
                           Thank you            01/01/70 00:00      
   reconstructed website            01/01/70 00:00      
   Update            01/01/70 00:00      

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