Questions about 'comparing nRF52840 vs nRF52832', what are the big differences between them?

[Sunny WooYang Heo]

Questions about 'comparing nRF52840 vs nRF52832', what are the big differences between them? 

hi, all.

How are you doing? 

I want  to apply nRF52840 instead of nRF52832, for the convenience of fusing firmware using USB. 

Is this right solution? 

Could somebody help me to providing the comparison sheet between them? 

Additionally, could somebody tell me how upgrade firmare using USB? 

Just copy hex file into flashdisk using USB port? 

Thanks in advace. 

Best regards, 

Sunny

[Raoul]

Hi Sunny,

There's a nice table comparing features of our BLE products at https://www.nordicsemi.com/Products/Bluetooth-Low-Energy. A more detailed overview of nRF52-series chips can be found in our infocenter: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fstruct_nrf52%2Fstruct%2Fnrf52.html

Regarding flashing over USB, are you interested in having this convenience on your development kits or also on your final application?

Both the nRF52832 and nRF52840 DK's have support for flashing over USB - however there is currently a bug with version 3.0 of both DK's which breaks this feature.

If you have an older version of those DK's, flashing should be as simple as just copying the hex file to the disk as you say.

Let me know if anything is unclear.

Best regards,

Raoul Pathak

[Sunny WooYang Heo]

Regarding flashing over USB, are you interested in having this convenience on your development kits or also on your final application?

We want to flash nRF52840 over USB. 

Is it OK for just fusing hex file over USB? 

BR

Sunny

[Raoul]

If you are using the development kit, you can flash firmware via the USB Mass Storage Device (MSD) interface provided by the on board debugger.

If you want the ability to update firmware over USB with only the nRF52840 and no debugger, I think this should be possible. The nRF52840 has hardware support for USB. You would have to configure it as a MSD, and you'll need to add a bootloader such as MCUboot, to do the firmware update.

Another way to get a drag and drop interface for flashing is to use the Programmer application from nRF Connect for Desktop.

I hope that clarifies things.

Best regards,

Raoul