RE: Software and hardware Difference betwwen nrf52832 and nrf52840

Marte Myrvold — Tue, 02 Nov 2021 12:48:12 GMT

Hi Rajbir,

You will have to make some changes for going from nRF52832 to nRF52840. If your project is very similar to an existing nRF52840 project, you can start out with that and add your code. Another options is to transfer your nRF52832 project to nRF52840. To transfer a project to another SoC you must do the following:

Change every instance of nRF52832 to nRF52840, such as target or device (nrf52832_xxaa -> nrf52840_xxaa) and preprocessor definitions (NRF52832_XXAA -> NRF52840_XXAA)
Do the same with pca10040->pca10056
Adjust the linker script to match maximum RAM and flash of nRF52840 instead of nRF52832.
Change the startup files (<compiler>_startup_nrf52832.s -> <compiler>_startup_nrf52840.s and system_nrf52832.c- > system_nrf52840.c)
The project will require a different SoftDevice variant, so you must change this to one compatible with nRF52840. This would normally be s140, see nRF52840 SDK & SD compatibility matrix.

You should also be aware that there are some pins you should avoid for high load/frequency applications. Please see nRF52840 pin assigments for recommended usage.

[quote user=""]And what is the difference between pca10040 and 10056.[/quote]

Pca10040 is the nRF52 DK, and pca10056 is the nRF52840 DK.

Best regards,

Marte