Sid Price

Members
  • Content Count

    17
  • Joined

  • Last visited

  1. @attila I am finally back to trying to get an eMMC decoder working and getting more confused, I hope I can get a nudge in the right direction. This is my attempt at a decoder, it does not produce a display at all: // rgData: input, raw digital data array // rgValue: output, decoded data array // rgFlag: output, decoded flag array samples = rgData.length synced = 0 bit = 47 clkState = 0 not_synced = 0 sync_bit = 1 tx_bit = 2 cmd_index = 3 content = 4 crc = 5 end = 6 temp = 1 for(var i = 0; i < samples; i++){ // // check if the clock input is low, if so we done for this loop //
  2. I am having trouble with my Digital Discovery. I am getting noise displayed on the digital inputs. For example, I have a 400KHz clock on DIN0 and the data is supposed to be on DIN1. I need to trigger on the DIN1 negative edge. What I see, while DIN1 is actually a constant "1" (verified with 'scope) is glitches on some falling edges of the clock (DIN0). If I ground DIN1 I still see glitches on that input. I have tried switching tot DIN3 for the data but still see the same pulses The attached screen capture shows DIN0 on CLK and DIN1 on the data input. As I said, my 'scope does not show the
  3. @attilaWhat would be an improvement is that when using "Screen" if one adjusted the time-base so the signal is displayed the instrument would stay on that time-base when the Screen display was next selected. This would at least make the instrument more reliable. It would be especially helpful if it did not adjust the time-base automatically at all, just stay on whatever the other modes are using. Chances are for a particular workspace all the modes are going to require being at similar time-bases.
  4. @attilaThanks for pointing that out ... why does the instrument do that? Seems a little user hostile to me. I have neve seen a 'scope to that and I have worked with them for many, many years.
  5. Hi @attila, I made a screen capture video of the issue. https://sidprice-my.sharepoint.com/:v:/p/sid/EdFLPpuBkqROt0LyqCW3DjkBVNhaWcUudqz4TT29nYvfQw?e=rhg13f Thanks.
  6. OK, will do. Sorry I missed tour reply, I didn't get a notification from the forum. :( Hopefully I can post the screen shots later today. Thank you again.
  7. I have an issue with the scope of my AD2. I spent a long time trying to figure out why I was not seeing a 400KHz square wave on the output of my MCU. However, when I used the logic instrument it showed the signal. Eventually I switched to a different scope and the signal was indeed present and looking good. What I have found is that if the mode is set to "screen" I see a DC voltage of about half the supply rail, however, when I change to "Repeated" the signal appears once again. I also see some very strange captures when I record the signal, it should be continuous, the recording shows i
  8. Does anyone have a custom protocol file for decoding the eMMC command bus? Or, perhaps a simple decoder that would lead me in the right direction to write one. I have not written a custom decoder before and I am not sure wat the basic process is. Thanks.
  9. Please ignore this question, in fact it may be deleted, it was an error on part and the tools are visible for use. Sorry ... Sid
  10. Hello, I am working on a project for a client and I need him to send be a capture from Logic that I can open and make measurements on. I had them send their workspace file with a capture and I can open this and view the captured waveform. However, the measurement tools are not visible and so I cannot perform any measurements. "Measurements" is checked in the "View" menu, but no tools displayed. How can this be done? Which file should my client share? They also sent the acquisition file, however, even though I can load it I cannot make any measurements. Sid
  11. @attilaExcellent thank you. I have adjusted it for 8-bit "words" and now I need to convert it for LSBit first. If I get stuck I will let you know, thanks! Sid
  12. @[email protected] Thanks for the quick response. >>> Do you really need a custom decoder? Well I have a large captured stream I need to decode, so, yes I could somehow do it by hand but, since I need to possibly examine many captures, having the AD2 do it is desirable. I looked at the links you included and I have to admit they are way beyond my feeble mind. Many thanks, Sid
  13. Is there an example of how to write a custom decoder for manchester encoding. I have a data stream captured and I would like to decode it. Sid
  14. Hi @attila I am using Windows 10 x64 Also note that the tip to use the 4th selection; I have that selection made.