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Piezo Haptic Actuators - PowerHap
Application note for evaluation kit 60 V
Preliminary data
Figure 5: Audacity® software interface.
6.
The balance between channels A and B can be changed using the "L/R" dial in the "Audio Track" field,
L corresponding to channel A, R to channel B. The gain can also be changed with "-/+" dial, but
beware of positive gains that may cause output clipping.
7.
To generate another kind of waveform, change its frequency or amplitude, go to the
"Generate/Tone..." menu. For Square and Sawtooth, it is possible the software will calculate points
based on an 8 kHz filter, therefore distorting the output waveform.
8.
Existing or generated .wav files can be played with Audacity®, loaded with the "File/Open..." dialog.
9.
If starting a new project, make sure to use a Project Rate at 8 kHz (lower left corner field).
10. For other Audacity® features, please refer to the software help
5 Firmware
5.1 Identifying the firmware revision number
Since firmware revision 2.2, when powering up the development kit, both LEDs will show the firmware revision
number and then the IC revision.
After the 10-second bootload window while both LEDs are on (see next section), the green and red LEDs flash
to indicate the firmware revision number. For a firmware revision X.Y with major revision X and minor revision Y,
the green LED will flash X times and then the red LED will flash Y times. This sequence is repeated for a beta
revision.
Then both LEDs are lit a short while as some initialization is performed, and then ICs are identified. Green LED
will flash to indicate channel A BOS1901 IC revision, and red LED will flash to indicate channel B BOS1901 IC
revision. For each channel, the LEDs will flash 1, 2 or 3 times to indicate the IC for that channel is of revision A,
B or C respectively.
PPD PI AE/IE PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 14 of 28
Z63000Z2910Z1Z44
2019-05-08
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