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DRV2667EVM-CT: "Design & Test Mode" problems

KliPat
Prodigy 100 points
Part Number: DRV2667EVM-CT
Other Parts Discussed in Thread: USB2ANY, DRV2667

Hello,

i ran into troubles using the "Design & Test Mode".

While trying to generate my own haptic feedback i had some problems increasing/decreasing the amplitude of my waveform. Nothing changed at all while pressing B3 or B4 in Mode 4. 

This is the maximum(only) aplitude i can get.

Did i miss something? 

I couldn´t increase/decrease the rampup aswell.

When i press B4 in Mode 5 i get this signal:

And after i pressed this button it stays this way. i cant change anything anymore. After i switched into another mode i dont get any reaction.

The only thing i get is this signal until i disconnect the USB-cable.

Is there a technical issue?

Thanks.

Best Regards

Patrick Klinkau

  • 0
    TI__Guru* 95145 points
    Hi Patrick,

    Welcome to e2e.
    Amplitude adjust is Mode 3 and you mention Mode 4, is this just a typo in your post? The amplitude adjust is made gradually so several touches are needed to see a big difference in amplitude.
    I can only see half cycles in your captures, are you using the on-board actuator?
    Is this happening every time you try the Design & Test Mode? Did you follow the steps as explained in the Users Guide (www.ti.com/.../slou323.pdf)

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    Prodigy 100 points

    Hi Ivan,

    yes i typed it wrong. I meant Mode 3. I tested it again and as u said i needed several touches to see an increasement. 
    I used another Piezo element in this circuit, but as i remember the piezo on board has shown the same course. In the grafic shown i scaled between Out+ and Out- to see the voltage at the piezo.

    But sadly in mode 5 the problem stays. After i tried to increase the ramp up i cant leave this mode and i can only hear a continiousy buzz (now Out+ to GND):

    When i go into mode 6 and increase the ramp down once and go into mode 5 there isnt a problem at all.

    Here i pressed B4 in Mode 6:

    And now i went into mode 5 and pressed B4:

    Am i doing something wrong here? 


    Best regards,
    Patrick Klinkau

  • 0 in reply to KliPat
    TI__Guru* 95145 points
    Patrick,

    Perhaps your effect duration is too short, could you please try to increase it?

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    Prodigy 100 points

    Hello Ivan,

    i increased the duration. But again, as soon as i pressed B4 in mode 5 i get the following curve:

    and i cant leave this mode. I can only interrupt the buzz disconnecting the USB cable.

    Best regards,

    Patrick Klinkau

  • 0 in reply to KliPat
    TI__Guru* 95145 points
    Patrick,

    Could you please explain what you're doing, step by step? I'll try to replicate this to identify if this is an isolated malfunction.
    So far I'm not able to get the EVM stuck in one of the modes.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    Intellectual 375 points
    Hello,
    I'm seeing the same issue with DRV2667EVM-CT received a couple weeks ago.

    As soon as you go into mode 5 and press B4 (Increase ramp up), you hear a continuous buzzing from the piezo and the device doesn’t respond to any of the buttons anymore. You cannot change the mode afterwards.

    Only when you remove the USB cable and go back to the Design & Test mode, can you change settings like. e.g. change the amplitude.
    However, if you make adjustments in mode 6 beforehand e.g. If "increase ramp down" is changed, you can normally press button B4 in mode 5 and make changes.

    Is this a normal operation?
    -Kyle
  • 0 in reply to Kyle_B
    TI__Expert 8691 points

    Hi Kyle and Patrick,

    The issue with the ramp-up time is because the waveform duration is not long enough. The minimum times step is 32ms, so the waveform needs to be at least 32ms long in order to increase the ramp by one step. This is specified in table 3 of the datasheet. Once I increase the duration, I don't see the device get hung in the continuous vibration mode.

    The ramp down time is added to the end of the waveform, so you will just see the waveform extend another ~32ms.

    A much easier way to customize the waveforms is by using Haptic Control Console. We just released a user guide that can help you get started. Once you have the program, look at the RAM manager for DRV2667 and open the advanced tab. You will need a USB2ANY with custom firmware in order to communicate with the EVM. If you would like to try this, I can reach out to you and provide the custom firmware.  

  • 0 in reply to Kelly Griffin
    Prodigy 100 points

    Hello Kelly,

    thanks for solving our problem.

    And yes i would like to get an USB2ANY to work with the the Haptic Control Console.

    Regards,

    Patrick Klinkau

  • 0 in reply to KliPat
    TI__Expert 8691 points
    You're welcome Patrick. I've sent you an email with instructions. Please mark the tread as answered if you feel that we resolved your questions. If you have any additional questions, feel free to start another thread.