nRF52832 revision 3

[Август]

Hello 

Now we are testing the third version of nRF52832 nrf52833 nrf52840 ic

I learned that there is a feature to lock and unlock the debug port of the device, but I use the armgcc and segger development environment instead of MDK.

How do I test this feature？Thank you.

SDK:sdk17.2

IDLE:segger/armgcc

Project: ble_app_uart

1. Start with a CTRL-AP ERASEALL operation.

Can I use nrfjprog.exe --eraseall?

2. Program code compiled with MDK 8.40.1 or later, with ENABLE_APPROTECT defined.

I am using armgcc and segger? Can I do it like this picture below? 

I search all the project but I can't find ENABLE_APPROTECT，why？

3. Write Enabled (0x00) to UICR.APPROTECT

Can I write like this NRF_UICR->APPROTECT = 0x00;

[Август]

Why can't the program be run using the following command
nrfjprog.exe -f NRF52 --recover
nrfjprog.exe -f NRF52 --program xxx.hex
nrfjprog.exe -f NRF52 --reset

Need to use the following instructions to burn to run
nrfjprog.exe -f NRF52 --recover
nrfjprog.exe -f NRF52 --eraseall
nrfjprog.exe -f NRF52 --program xxx.hex
nrfjprog.exe -f NRF52 --reset

[Amanda Hsieh]

Hi,

Can I use nrfjprog.exe --eraseall?

Yes. 

I am using armgcc and segger? Can I do it like this picture below? 

Yes.

I search all the project but I can't find ENABLE_APPROTECT，why？

It's in the system_nrf52_approtect.h under nRF5_SDK_17.1.0_ddde560\modules\nrfx\mdk

Август said:

Why can't the program be run using the following command

Because APPROTECT has been enabled. You need the --recover when APPROTECT has been enabled, which means you will need it after power cycling / pin resetting a device with empty flash.

Regards,
Amanda

[Август]

Hi 

Thanks for your quick response,but I can't find system_nrf52_approtect.h.

Because APPROTECT has been enabled. You need the --recover when APPROTECT has been enabled, which means you will need it after power cycling / pin resetting a device with empty flash.

But I have to use the following two commands.

nrfjprog.exe -f NRF52 --recover
nrfjprog.exe -f NRF52 --eraseall

[Amanda Hsieh]

Hi, 

nRF52832 rev3 is added in SDK 17.1.0 which contains system_nrf52_approtect.h.

You can bundle --program with --recover.

Can you try this ?

nrfjprog.exe -f NRF52 --program xxx.hex --recover

This approach ensures that the FW is written directly after the CTRLAP->ERASEALL (--recover), which makes it so that the intermediate unlocking image is not needed.

The intermedia unlocking image must be removed when programming your fw image, hence a sector erase or page erase could in fact be used instead of eraseall if not bundling the commands after each other as proposed above.

-Amanda