nRF24LU1+ Programming Through USB

RE: nRF24LU1+ Programming Through USB

cyaoplus — Fri, 25 May 2018 02:03:20 GMT

Hi Håkon,

Thanks for answering. Then I suspect I got used parts.

RE: nRF24LU1+ Programming Through USB

Håkon Alseth — Thu, 24 May 2018 08:12:34 GMT

Hi,

A "blank" nRF24LU1+ should enumerate as either "nRF24LU1P-F32 BOOT LDR" (typical to get via windows update) or "nRF24LU1+ Bootloader" (newer driver, supplied with nRFgo Studio) depending on which driver is loaded.

The first one is the older libusb-0.1 driver, while the "nRF24LU1+ Bootloader" is the libusb-1.0 driver.

Kind regards,

Håkon

RE: nRF24LU1+ Programming Through USB

cyaoplus — Thu, 24 May 2018 01:42:33 GMT

Hi Håkon,

Thank you for your reply. I am sure I haven't flashed the "USB receiver" chip before. Actually all the 20 pcs chips I got were named as "USB receiver" in device list. However, it may has possibility that I got used chips from the supplier. What is the correct or official name for nRF24LU1+ with original bootloader shown in device list?

RE: nRF24LU1+ Programming Through USB

Håkon Alseth — Wed, 23 May 2018 07:10:34 GMT

Hi,

I suspect that the device "USB Receiver" has already been programmed once before.

When delivered from Nordic, each nRF24LU1+ will have the USB bootloader present in flash and will enumerate as a bootloader device.

The USB bootloader is made as an option for mass-production, and is considered "lost" once you have used it for programming once.

It is possible to read out the USB descriptor strings in your device manager, where you can see the identifiers for the specific "USB Receiver" device.

Best regards,

Håkon