U2 programmer problem - Saleae Logic Probe measurements, SOLVED


Closed Thread
Results 1 to 13 of 13

Hybrid View

  1. #1
    Join Date
    Oct 2005
    Location
    Sweden
    Posts
    3,612


    Did you find this post helpful? Yes | No

    Default Re: U2 programmer problem - Saleae Logic Probe measurements

    Hi,
    OK, now I see the difference, I still have no idea what the problem might be though.

    To the left of the sampling frequency drop down box you have another dropdown where you select how many samples to take at your currently selected sampling frequency. You can take as much at 10G samples which, at your current rate of 50kHz would last 55h. Even at the highest sampling frequency, 24Mhz (if you computer can keep up) 10G samples will last almost 7 minutes(!).

    /Henrik.

  2. #2
    Join Date
    Jan 2005
    Location
    Montreal, Quebec, Canada
    Posts
    3,154


    Did you find this post helpful? Yes | No

    Default Re: U2 programmer problem - Saleae Logic Probe measurements

    There's also activity on PGC on the AMD PC after 13.6s. I went back for a better pic in case it was an issue with the zoom not yet picking up a short signal:

    Name:  U2 pgm 16F877 Easy Quiz - Compare zoom max.jpg
Views: 1250
Size:  198.3 KB

    I'm definitely missing pulses on the C2Q PC and have no clue why that would be.

    Either something is wrong with the USB ports, which is unlikely 'cause every other device works properly; gaming wheel/yoke/thrust quadrant/joystick, mouse, keyboard, digital camera, logic probe, etc.

    Or something is wrong with the U2 programmer at the driver level, 'cause the hardware works properly on the other PC.

  3. #3
    Join Date
    Jan 2005
    Location
    Montreal, Quebec, Canada
    Posts
    3,154


    Did you find this post helpful? Yes | No

    Default Re: U2 programmer problem - Saleae Logic Probe measurements

    Quote Originally Posted by HenrikOlsson View Post
    ...Even at the highest sampling frequency, 24Mhz (if you computer can keep up) 10G samples will last almost 7 minutes(!)...

    I'll test this after breakfast (wife bellows).

Members who have read this thread : 0

You do not have permission to view the list of names.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts