Problem using usb dfu trigger on nrf52840 dongle with nRF Connect

RE: Problem using usb dfu trigger on nrf52840 dongle with nRF Connect

hurbanski — Tue, 19 Nov 2019 12:00:37 GMT

Yes, it is the same case. Thank you.

RE: Problem using usb dfu trigger on nrf52840 dongle with nRF Connect

Kenneth — Mon, 18 Nov 2019 09:24:33 GMT

Can it be the same case as here (VID/PID):
https://devzone.nordicsemi.com/f/nordic-q-a/48539/buttonless-dfu-without-ble/219740#219740

RE: Problem using usb dfu trigger on nrf52840 dongle with nRF Connect

hurbanski — Fri, 15 Nov 2019 09:06:30 GMT

I am trying to use the nrf dfu trigger library, it is the only use of usb in my application. Therefore I call nrf_dfu_trigger_usb_init() right at the start of main().

All other necessary function calls on a dfu trigger event should be handled by this library, right?

Also there is the same behaviour in nrfConnect when using the ble_connectivity example hex file from the sdk.

Shouldn't this work "out of the box"? nrfConnect can't detect the trigger library even though it is present.

RE: Problem using usb dfu trigger on nrf52840 dongle with nRF Connect

Kenneth — Thu, 14 Nov 2019 20:39:33 GMT

Not sure if I understand, but I assume that you are doing a NVIC_SystemReset() when you want to switch from application to bootloader. In such I assume you should also stop the USB functionality to force a re-enumeration from the PC, so I assume you are calling nrfx_usbd_stop() before soft reset?

/**
 * @brief Stop USB functionality.
 *
 * This function disables USBD pull-up and interrupts.
 *
 * The HFXO request is released in this function.
 *
 * @note
 * This function can also be used to logically disconnect USB from the HOST that
 * would force it to enumerate device after calling @ref nrfx_usbd_start.
 */
void nrfx_usbd_stop(void);