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DRV2605 Simple ON and OFF with PWM Control

Joanne Armitage
Prodigy 20 points
Other Parts Discussed in Thread: DRV2605

Hello, 

I am using the DRV2605 with Arduino, I have got it working with the library and LRA and ERM motors, but I'm struggling to work out how to send my own custom vibration patterns for testing. I essentially want to send PWM 100% for 50ms then turn completely off. Currently I am using the Adafruit library with Arduino, but have modified it for my purposes.

Kind regards,

Joe

  • 0
    TI__Expert 8940 points

    Hi, Joe:

    currently, you are using DRV2605 PWM_input mode. What's your input PWM frequency?

    if you want to send PWM 100%, we can configure the DRV2605 to work in external level trigger mode (LRA, CloseLoop).

    So, HIGH input to IN/Trig pin will trigger the vibration, and LOW input will stop the vibration.

    can you please provide the register values of DRV2605? we can know the DRV2605 status.

  • 0 in reply to Peter Li79
    Prodigy 20 points
    Hello sorry for a very late reply.

    I do not understand your first question - what is your input frequency?

    Can I control PWM say like I do for a LED driver, at multiple values?

    So far I have the driver setup for Open Loop working with both ERM and LRA.

    Here are the register values I have setup so far:

    (REGISTER, VALUE)
    (0x01, 0x00)

    (0x02, 0x00)

    (0x04, 1)
    (0x05, 0)

    (0x0D, 0)

    (0x0E, 0)
    (0x0F, 0)
    (0x10, 0)
    (0x13, 0x64);

    (0x1A, 0xB6);

    Thanks, your help is appreciated

    Joanne
  • 0 in reply to Joanne Armitage
    TI__Expert 8940 points

    Hi, Joanne:

    I don't understand "the Adafruit library with Arduino".

    Is it a sequence of different PWM duty cycles?

    To drive an actuator with DRV2605, the most easy way is to use close-loop mode. the output can be customized with different vibration strength.

    this can be achieved by changing the register value of 0x02 along with a timer.

    the waveform looks like : (strength0, duration0),(strength1, duration1)....

    if using PWM input is a prerequisite in your application, we can work out a corrent register configuration.

    please help me clarify this.

    Thanks.