Add LPCOMP module#195
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jonas-schievink merged 10 commits intonrf-rs:masterfrom Aug 25, 2020
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Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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Added a HAL module for the LPCOMP low power comparator peripheral.
In System ON, the LPCOMP can generate separate events on rising and falling edges of a signal, or sample the current state of the pin as being above or below the selected reference. The block can be configured to use any of the analog inputs on the device.
Additionally, the low power comparator can be used as an analog wakeup source from System OFF or System ON. The comparator threshold can be programmed to a range of fractions of the supply voltage or to use an external analog reference input pin.
Tested on nRF52840-DK
Demo showing "analog power up" usage and interrupt triggering/reading comparator state:
https://github.com/kalkyl/nrf-hal/blob/lpcomp/examples/lpcomp-demo/src/main.rs