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Extend SAADC one shot support

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One-shot mode now permits the sampling of differential pins, and the sampling of multiple pins simultaneously.

A new ChannelConfig structure has been introduced so that multiple channels can be configured individually. Further, the `sample` method now accepts a buffer into which samples are written.

Along the way, I've reset some default configuration to align with Nordic's settings in their nrfx saadc driver. Specifically, the channel gain defaults to 6 (from 4) and the time defaults to 10us (from 20us).
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huntc
2021-10-07 18:00:03 +11:00
parent 009b77c1b9
commit cef6158c31
3 changed files with 145 additions and 44 deletions
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README.md
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@ -35,6 +35,8 @@ The `embassy-nrf` crate contains implementations for nRF 52 series SoCs.
- `uarte`: UARTE driver implementing `AsyncBufRead` and `AsyncWrite`.
- `qspi`: QSPI driver implementing `Flash`.
- `gpiote`: GPIOTE driver. Allows `await`ing GPIO pin changes. Great for reading buttons or receiving interrupts from external chips.
- `saadc`: SAADC driver. Provides a full implementation of the one-shot sampling for analog channels.
- `rtc`: RTC driver implementing `Clock` and `Alarm`, for use with `embassy::executor`.
## Examples