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samples: usb: hid-keyboard: enable and use remote wakeup on button press

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USB remote wakeup capability is a common feature of keyboards,
allowing them to wake up a suspended host. Currently there is no USB sample
that demonstrates remote wakeup, which makes basic evaluation of the
functionality non-trivial.

Modify the hid-keyboard sample with a minimalistic solution
of demonstrating remote wakeup capability. While it is not required to have
been configured prior to suspend to issue a wakeup request, from usability
perspective I'd say it makes sense.

Signed-off-by: Benedek Kupper <kupper.benedek@gmail.com>
This commit is contained in:
Benedek Kupper 2024-10-02 22:11:48 +02:00 • committed by Benjamin Cabé
commit f5b3362c79
2 changed files with 12 additions and 0 deletions
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1
samples/subsys/usb/hid-keyboard/prj.conf
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@ -6,6 +6,7 @@ CONFIG_USBD_LOG_LEVEL_WRN=y
CONFIG_USBD_HID_LOG_LEVEL_WRN=y
CONFIG_UDC_DRIVER_LOG_LEVEL_WRN=y
CONFIG_SAMPLE_USBD_PID=0x0007
CONFIG_SAMPLE_USBD_REMOTE_WAKEUP=y
CONFIG_GPIO=y
CONFIG_INPUT=y

11
samples/subsys/usb/hid-keyboard/src/main.c
View file

@ -279,6 +279,17 @@ int main(void)
continue;
}
if (usbd_is_suspended(sample_usbd)) {
/* on a press of any button, send wakeup request */
if (kb_evt.value) {
ret = usbd_wakeup_request(sample_usbd);
if (ret) {
LOG_ERR("Remote wakeup error, %d", ret);
}
}
continue;
}
ret = hid_device_submit_report(hid_dev, KB_REPORT_COUNT, report);
if (ret) {
LOG_ERR("HID submit report error, %d", ret);