Can nRF24LU1P USB Dongle can auto resume after suspend?

RE: Can nRF24LU1P USB Dongle can auto resume after suspend?

Hung Bui — Wed, 28 Dec 2016 09:17:06 GMT

P/S: Also please make sure you enable wake up on USBWU by setting bit 2 in WUCONF.

RE: Can nRF24LU1P USB Dongle can auto resume after suspend?

Hung Bui — Wed, 28 Dec 2016 09:10:11 GMT

I'm not sure why it doesn't work. But you may want to check if it's allowed from the host that the device can wake up on its own USB_BM_STATE_ALLOW_REMOTE_WAKEUP.

I would suggest you to have a look at our reference code in our nRFDesktop example code. Here is what inside our wake-up code:

void hal_usb_wakeup()
{
  // We can only issue a wakeup if the host has allowed us to do so
  if((g_hal_usb.bm_state & USB_BM_STATE_ALLOW_REMOTE_WAKEUP) == USB_BM_STATE_ALLOW_REMOTE_WAKEUP)
  {
    USBCON = 0x40;  // Wakeup the USB controller via remote pin
    delay_ms(1);    // Wait until the USB clock starts
    USBCON = 0x00;
  }
}

If you don't have access to the nRFReady Desktop code, please create a case on MyPage on our website and give me the case number.

RE: Can nRF24LU1P USB Dongle can auto resume after suspend?

Chaw — Wed, 28 Dec 2016 00:28:00 GMT

Thanks for your reply. How can I set USBCON SFR register? I do like below, but it do not work:

if (hal_usb_get_state() == SUSPENDED)
{            
        USBCON = 0x40;
}

above code is exist in my program while(true), it can not work.

RE: Can nRF24LU1P USB Dongle can auto resume after suspend?

Hung Bui — Tue, 27 Dec 2016 14:26:27 GMT

Hi Chaw,

At section 7.8.1 in the nRF24LU1P spec, you can find that you can wake the USB up by setting bit 6 in USBCON SFR register.