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PhilipJ

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  1. Hi Attila, Dohh!! I don't know why it didn't occur to me to use the Next Event on the protocol line!! I seemed to be over-focused on the Chip Select line... Thanks. regards PhilipJ
  2. Hi, the Waveforms program is really good at capturing a great deal of data, particularly when analyzing communications traffic on SPI . I am trying to find a good way, having captured a LONG buffer, to step through "transactions e.g. The problem I'm having is that I can't zoom the Logic View so that it shows just one transaction (as shown in the picture above). Also, when I use the Next Event/Previous Event features (the blue arrows at the ends of the waveforms) they don't always jump to show a full transaction. I'm using them on the Chip Select waveform (the 2nd one down in the picture above) and I would like them to ALWAYS bring a falling edge to, say, 10% into the Logic View. So my questions are: 1) Could we have a "Zoom select" option for the window? Scrolling with the mouse wheel is great but the jumps in scale it makes aren't always suitable for what I want to see whereas a "drag a bounding box" type zoom would be perfect. 2) Could those blue arrow "next event" options be configured to always choose a rising edge or a falling edge? 3) Could that "jump to next event" be programmed to bring the event to a SPECIFIC point on the screen (say 10% or 90% of the view width depending on whether you use Next or Previous). Sorry, if this has been covered and I've missed it in the documentation regards PhilipJ
  3. Hi thank you. I'll check out the part number you mention but it might be that the sort of suppliers open to me (CPC, RS etc.) don't stock them, or if they do they only sell in quantity. Anyway, it all helps regards PhilipJ
  4. I've had a play and that's great, just what I was hoping for. I assume that when it refers to an "event" that is a rising or falling edge ? Having shown me that menu you've prompted a whole host of other questions: What is the thinking behind "labels" ? I tried adding one thinking it might "attach" to an event and therefore scroll with the waveform but it just seem to stay where I had put it on the screen and the waveform moved left or right behind it. Also, what does "Set First" and "Set Last" do ? I tried clickin g them but couldn't work out what it was doing... Thanks for your time, it's all great stuff PhilipJ
  5. Oh Thanks :-) I guess I should have read the manual before posting. regards PhilipJ
  6. Hi, can I suggest a feature for Waveforms? When capturing channels in a Logic workspace, something to scroll the main waveform drawing(s) left or right to the next (or previous) rising (or falling) edge. This would be useful whenI have captured a long buffer of intermittent communications (say SPI), I've zoomed in to see what a particular packet of data is and now I want to scroll to the next packet. At the moment I have to zoom out, re-focus on the next packet and then zoom in again. I used to use this feature in, I think it was sigview, where they have 2 little icons at each end of a drawn waveform, clicking on the one at the left edge would scroll the view so as to centre on the previous edge found (that is currently off screen) and the one on the right would do similar for the next edge found. It would be really helpful when you have captured data that is little bursts with long "silences". Anyway, that's all, hope you don't mind me suggesting... regards PhilipJ
  7. I see on the website that you make a "Breadboard Adapter for Analog Discovery". I wonder if you would consider making a version for the Digital Discovery (32-pin connector instead of the 30-pin) ? I think it would be useful for making up proprietory cables to plug onto specific test connectors on our production boards. Failing that would you consider adding the 32-pin right-angled connector that matches the Digital Discovery's connections to the list of accessories that you sell ? PhilipJ
  8. Hi attila, thanks for the reply. I will download the update. Kind regards PhilipJ
  9. Is there an option to make Waveforms draw digital waveforms with vertical edges rather than the sloping edges I am currently seeing? As an example, I am sampling a 24.576 MHz clock using 200 MHz sampling and I see this: I would prefer to see vertical edges even though I understand that what it is drawing is probably a fairer representation of the "real world". Thanks PhilipJ
  10. Thanks for the info, I will try the Filter stuff. Looking forward to the next version, triggering on 3 consecutive characters sound perfect :-) regards PhilipJ
  11. Hi Attila, thanks for the info, I am getting a bit more used to the user interface now. Your highlighted bit above; does this actually change where the trigger point is in the capture buffer? or jusr where stuff is displayed on the screen? What I mean is, can I set the DDiscovery to record a buffer full of data up to (and including) a trigger event or alternatively a buffer full of data starting at the trigger event and showing what happened afterwards? Ideally anything in between (probably in % as down to the individual sample level would be crazy if I had set it to 64M samples). I am making a lot of use of the protocol analysers in my Logic Workspace to capture UART comms in a multiprocessor system, I like the way it displays the serial bytes/characters but I am capturing a lot of data (~100mS at 230400 baud) so it would be nice to be able to search within the protocol waveform for a particular character or hex byte. Is this possible? Finally (for now :-)) - I like the opportunity to trigger on a UART character but it would be REALLY amazing if it were possible to trigger on a 2 character pattern - a lot of my protocol is based on a command header of 2 ASCII characters such as "LC" and commands terminated with "\r\n" I know there is a lot in the UI and I have a lot to learn, but so far I am really glad that I bought this product. regards PhilipJ
  12. Hi, that is possible, I'm still getting used to the interface. At first I thought the trigger position was always in the centre of the screen with 1/2 the captured samples to the left and 1/2 to the right but I have now caught onto the zooming and scrolling stuff. It would be nice to have a button that brings the trigger point back to centre for those times when we're zoomed in quite a lot. thanks for replying Regards PhilipJ
  13. OK, don't worry too much about this, after several times shutting down Waveforms and starting it again without loading the old Workspace it is drawing the waveforms ok again. PhilipJ
  14. So yesterday I received my new Digital Discovery and got started capturing some waveforms and even decoding them with the UART protocol analyser. I managed to trigger on specific protocol bytes, all going well. This morning I've started by loading the same Workspace and nothing is displayed all inputs are shown as logic high levels (even though I have enabled the pull-downs in the Power Supplies TAB). So I've reverted to simple waveforms, no protocol involved. I've set a negative edge trigger on "DIN 0" (I assume this is the input labelled HIGH SPEED INPUTS on the unit?) and connected it to my logic board (with a GND as well). I am set to 100MHz clock and 4M samples. My problem is, when I click on "Single" I see config'ed trig'ed done but there is just a high logic level displayed with no sign of the waveform!! I know there is signal on the input because I have an oscilloscope connected to the same pin and that shows me a clear 0 to 3.3v UART logic waveform repeating. Can you suggest what is going wrong? PhilipJ
  15. Hi, I am considering buying a "Digital Discovery" to replace a cheap chinese unit that I bought some years ago that is controlled by the freeware program "PulseView". This program is not really very good when it comes to trigger functions and what I know as "pre-roll", that is recording samples up to the trigger point rather than recording after the trigger point. Anyway, I am currently evaluating the WaveForms software in Demo Mode to see if it does some of the things I miss in the above mentioned but I can't work out how to get some dummy data in the view window. Without some data I'm getting a bit confused about zooming in/out on the data. I've set the Sample Rate to 100MHz and I've seen that I can use the mouse scroll wheel to "zoom" but I don't quite understand why the Base: and Rate: boxes change their values? Any advice/thoughts would be gratefully accepted PhilipJ
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