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Original question:

CCS/DRV2511Q1EVM: DRV2511Q1EVM firmware code

DRV2511Q1EVM: Trigger the MSP430 externally

Daniel Eckardt
Prodigy 10 points
Part Number: DRV2511Q1EVM
Other Parts Discussed in Thread: DRV2511-Q1

Dear TI Team

for a study project I am working with the DRV2511Q1EVM on haptic feedback for a touch surface and I have some questions for my unterstanding:

Is it possible to store a specific waveform on the MSP430 (via Haptics Control Console) and then trigger the input signal for the DRV2511-Q1 from an external source (via a digital input)?

If not, I may provide an external PWM signal. Does it have to be 3.3 V or is  5 V possible as well?

Many thanks for your help (:

have fun

dan

  • 0
    TI__Guru* 84915 points
    Hi, Dan,

    Unfortunately, it is not possible to send the waveform data from the Haptics Control Console to an external device. So, you would need to generate the waveform by the help of an external PWM as you mentioned.

    Just a recommendation, we suggest to use a low pass filter in order to convert the PWM signal into the waveform that you try to use (for example, a sine wave signal). The DRV2511-Q1 acts as an amplifier, so the entire PWM signal will be amplified if the filter is not used.

    For example, let's say that you are looking to use a frequency range from 20Hz to 20KHz, then you would need a ~22KHz low-pass filter. In this way, you would get a signal without the risk to amplify the PWM high frequencies.

    The external PWM signal may be 5V. The analog input absolute range is limited from -0.3V to 6.3V. So, please ensure to use a signal between these values to avoid any damage or any condition that could affect the device performance.

    I hope this helps. Please let me know if you have additional questions or comments.

    Best regards,
    Luis Fernando Rodríguez S.