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Is anything required to support remote wakeup? #18

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dlkj opened this issue Jan 10, 2022 · 3 comments
Open

Is anything required to support remote wakeup? #18

dlkj opened this issue Jan 10, 2022 · 3 comments
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@dlkj
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dlkj commented Jan 10, 2022

Anything more required other than setting UsbDeviceBuilder::supports_remote_wakeup(true)?
@dlkj dlkj added the question Further information is requested label Jan 10, 2022
@dlkj
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dlkj commented Jan 19, 2022

Yes, will require implementing suspended and resume in rp2040-hal::usb and exposing remote wakeup in usb-device

@ithinuel
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This does the trick: rp-rs/rp-hal#406

@JohnAZoidberg
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Anything more required other than setting UsbDeviceBuilder::supports_remote_wakeup(true)?

This just tells the host that the device supports remote wakeup. Then the host will "arm" remote wakeup which you can check with UsbDevice::remote_wakeup_enabled().
And finally, as @ithinuel mentioned you'll have to check your wakeup condition, that the device is in USB suspend, remote wakeup is enabled and then call the MCU specific API to actually wake the device/bus again.

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@dlkj @ithinuel @JohnAZoidberg