DRV2665_DIGITAL Class Reference

DRV2665_DIGITAL class. More...

#include <drv2665.h>

Detailed Description

DRV2665_DIGITAL class.

DESCRIPTION

DRV2665: Piezo Haptic Driver with Integrated Boost Converter and Digital Front End The DRV2665 device is a piezo haptic driver with integrated 105-V boost switch, integrated power diode, integrated fully-differential amplifier, and integrated digital front end. This versatile device is capable of driving both high-voltage and low-voltage piezo haptic actuators. The input signal can be driven as haptic packets over the I2C port or through the analog inputs

The digital interface of the DRV2665 device is available through an I2C compatible bus. A digital interface relieves the costly processor burden of the PWM generation or additional analog channel requirements in the host system. Any writes to the internal first-in, first-out buffer (FIFO) will automatically wake up the device and begin playing the waveform after the 2 ms internal start-up procedure. When the data flow stops or the FIFO under-runs, the DRV2665 device will automatically enter a pop-less shutdown procedure.

The boost voltage is set using two external resistors, and the boost current limit is programmable through the REXT resistor. A typical start-up time of 2 ms makes the DRV2665 device an ideal piezo driver for fast haptic responses. Thermal overload protection prevents the device from being damaged when overdriven.

Datasheet for DRV2665 can be found at: http://www.ti.com/lit/gpn/drv2665

Example:

  #include "mbed.h"
  #include "DRV2665.h"
  
  DRV2665_DIGITAL piezo(I2C_SDA, I2C_SCL); // DRV2665 digital mode object
  
  int main()
  {
      piezo.init(DRV2665_100_VPP_GAIN, DRV2665_5_MS_IDLE_TOUT); // set output level to 100Vpp and idle timeout to 5ms

      while(1) {
          
          piezo.outputSine(8000); // outputs 8khz sine waveform at selected voltage level

          wait_ms(1);
      }
  }

Definition at line 123 of file drv2665.h.

Constructor & Destructor Documentation

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