Setting USB serial number for nrf52820 & nrf52833

[Andreas3T]

Hi,

Is it possible to set the USB serial number for the nrf52833 and nrf52820 MCU's?

For the nrf52840 I've found this documentation:
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fficr.html

But it seems to be nrf52840 exclusive.

Best Regards,
Andreas

[Kenneth]

Hi,

You can set the serial number to whatever value you want, e.g see APP_USBD_STRING_ID_SERIAL during initialization:

#define APP_USBD_CORE_DEVICE_DESCRIPTOR  {                                                               \
   .bLength = sizeof(app_usbd_descriptor_device_t),    /* descriptor size */                             \
   .bDescriptorType = APP_USBD_DESCRIPTOR_DEVICE,      /* descriptor type */                             \
   .bcdUSB = APP_USBD_BCD_VER_MAKE(2,0,0),             /* USB BCD version: 2.0 */                        \
   .bDeviceClass = 0,                                  /* device class: 0 - specified by interface */    \
   .bDeviceSubClass = 0,                               /* device subclass: 0 - specified by interface */ \
   .bDeviceProtocol = 0,                               /* device protocol: 0 - specified by interface */ \
   .bMaxPacketSize0 = NRF_DRV_USBD_EPSIZE,             /* endpoint size: fixed to: NRF_DRV_USBD_EPSIZE*/ \
   .idVendor = APP_USBD_VID,                           /* Vendor ID*/                                    \
   .idProduct = APP_USBD_PID,                          /* Product ID*/                                   \
   .bcdDevice = APP_USBD_BCD_VER_MAKE(                 /* Device version BCD */                          \
       APP_USBD_DEVICE_VER_MAJOR,                                                                        \
       APP_USBD_DEVICE_VER_MINOR,                                                                        \
       APP_USBD_DEVICE_VER_SUB),                                                                         \
   .iManufacturer = APP_USBD_STRING_ID_MANUFACTURER,   /* String ID: manufacturer */                     \
   .iProduct = APP_USBD_STRING_ID_PRODUCT,             /* String ID: product */                          \
   .iSerialNumber = APP_USBD_STRING_ID_SERIAL,         /* String ID: serial */                           \
   .bNumConfigurations = 1                             /* Fixed value: only one configuration supported*/\
}

The link you refer to are used during bonding in Bluetooth, it's not related to USB.

Kenneth

[Andreas3T]

Thanks!

I linked to the wrong page, it should have been:
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v17.0.2%2Fgroup__app__usbd__serial__num.html

Is this function still nrf52840 exclusive?

Best Regards,
Andreas

[Kenneth]

This will also work on the nRF52833 and nRF52820 yes, I can only assume the "nRF52840 only" was written prior to nRF52833 and nRF52820 was available.

Kenneth