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esp32: Expose touch_pad_get/set_meas_time() in python #6408

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@fgervais fgervais commented Sep 5, 2020

The esp32 can enter deep sleep and use really little current. For example on the tinypico board I measured a current of 24 uA in deep sleep.

The esp32 also provides a touch sensor module which can be used to wake-up from deep sleep. However this module uses about 2 mA of current to do the touch detection and (by default) does it for about 4ms at 37 Hz.

This means that all these efforts to use really little power will be ruined by the touch sensor using 100 times the sleep power roughly 15% of the time.

The good news it that Espressif provides a way to customize those timings and depending on the application, the power consumption of the touch sensor can be greatly reduced.

This patch simply exposes this functionality in python.

Signed-off-by: Francois Gervais <francoisgervais@gmail.com>
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fgervais commented Sep 5, 2020

Anybody know why it fails in ESP-IDFv4?

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fgervais commented Sep 5, 2020

Ok looks good now

tannewt pushed a commit to tannewt/circuitpython that referenced this pull request May 23, 2022
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This is an automated heads-up that we've just merged a Pull Request
that removes the STATIC macro from MicroPython's C API.

See #13763

A search suggests this PR might apply the STATIC macro to some C code. If it
does, then next time you rebase the PR (or merge from master) then you should
please replace all the STATIC keywords with static.

Although this is an automated message, feel free to @-reply to me directly if
you have any questions about this.

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