SDK17 with nrf52820

[weizhen]

I have a lot of issues when switch to using nrf52820.

1. all saadc module seems removed from the sdk, or forget to add to nrf52820.
2. when using softdevice, get a log of nrf_success not found issue. already include nrf_error.h.

[Karl Ylvisaker]

Hello,

I have a lot of issues when switch to using nrf52820.

I am sorry to hear that!
Which SoC are you switching from, to the nRF52820?

all saadc module seems removed from the sdk, or forget to add to nrf52820.

The nRF52820 does not have an on-chip SAADC, unfortunately. You can see all the differences between the nR52 series SoC's in the nRF52 comparison table.

when using softdevice, get a log of nrf_success not found issue. already include nrf_error.h.

Which IDE are you using, and which error message are you getting?
There are no direct examples in the SDK for the nRF52820 - since there is no development kit for the nRF52820. However, since the nRF52820 is a subset of the nRF52833, you may use the nRF52833 to develop on, by emulating the nRF52820. 

Best regards,
Karl 

[weizhen]

if nrf52820 do not have SAADC, but it still have analog input pin right? then how can I use that? I do not see any example about ADC modules. 
I am switch from nrf52833 dev kit to an nrf52820 module. I have fixed the nrf_success undefined issue, that because I include unused folders, which have nrf_error.h but filter by a softdevice tag.
also I found another issue, nrf_log with UART also cannot build for nrf52820 but it works fine for nrf52833.

[Karl Ylvisaker]

weizhen said:

if nrf52820 do not have SAADC, but it still have analog input pin right? then how can I use that? I do not see any example about ADC modules. 

As I said, the nRF52820 does not have an on chip SAADC - which is why you are not seeing any ADC examples for it.
The analogue input pins can be used for the comparator peripheral.

weizhen said:

also I found another issue, nrf_log with UART also cannot build for nrf52820 but it works fine for nrf52833.

Please elaborate, what errors are you getting when you attempt to build it?
Did your nRF52833 project emulate the nRF52820 hardware as mentioned in my previous comment?

Best regards,
Karl