Porting nRF52840 DK code to nRF52805

[brianreinhold]

I have written BTLE code that works on the nRF52840 DK using SoftDevice s140. I have ported this code to work on the nRF51 DK and nrf51822 MCU using SoftDevice s130. I use SoftDevice only for flash writes and BTLE. I would like to know what it would take to port this code to the nRF52805 MCU? What SoftDevice should I use (would like the latest supported)?

[enukic]

Hi,

On the following link you can find a nice guide on porting to nRF52805:

https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/developing-for-the-nrf52805-with-nrf5-sdk

As it says, supported SD is s112, and other things you should keep an eye on is the memory layout and GPIO pin assignment.

Also, there are some files that need to be patched in the SDK, to enable support for the nRF52805.

Good luck!

[brianreinhold]

Yes, I took a look at that. At the moment, my projects involve on code on the MCU - I have no sensor MCU. I was looking for some insight into the differences Bluetooth-wise, s140 to s112 or s130 to s112, I am not sure I really understand what the differences between these SoftDevice versions are.

[enukic]

Please take a look at this:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_gsg_ses%2FUG%2Fgsg%2Fsoftdevices.html

So basically, different softdevices support different protocols, and also support different roles or combination of roles.

[brianreinhold]

There is nothing in that list for the nRF52805. What's the latest SoftDevice I can use with that MCU? Will SoftDevice s140 work? (BTLE peripheral only needed).

[enukic]

I'm sorry, I didn't understand what you were asking at first.

You need to see the difference between different softdevices (s110, s112, s140, etc), and specific softdevice version. For example, s112 has the following versions:

• S112 SoftDevice v7.3.0
• S112 SoftDevice v7.2.0
• S112 SoftDevice v7.0.1
• S112 SoftDevice v6.1.1
• S112 SoftDevice v6.1.0
• S112 SoftDevice v6.0.0
• S112 SoftDevice v5.1.0

So, the particular MCU nRF52805 supports S112 Softdevice. And which version of this particular softdevice you want to use, depends on you (or which SDK version you are using).

Link to the S112 specification:

infocenter.nordicsemi.com/.../s112.html