Create boot settings for nRF51822 using SDK_11.0.0

RE: Create boot settings for nRF51822 using SDK_11.0.0

Phil — Tue, 13 Aug 2019 01:50:44 GMT

This is how I did it:

rem Program the application, without boot settings
nrfjprog --program nrf51822_xxac_s130.hex --family NRF51 --sectorerase

rem Erase boot settings page
nrfjprog --erasepage 0x03FC00

rem Program the BOOT_VALID-APP field in boot settings
nrfjprog --memwr 0x03FC00 --val 0x00000001

nrfjprog --reset

Initially the nRF51822 contains only a softdevice and bootloader (programmed previously with nrfjprog). The application is flashed with the above commands using nrfjprog over J-link. The boot-loader remains in place and can be used for subsequent application DFU over serial

Thanks Vidar, your help is greatly appreciated.

RE: Create boot settings for nRF51822 using SDK_11.0.0

Phil — Tue, 13 Aug 2019 01:40:12 GMT

I've actually answered my own question. No

I got it working. Thanks Vidar.

RE: Create boot settings for nRF51822 using SDK_11.0.0

Phil — Tue, 13 Aug 2019 01:21:06 GMT

Thanks, this makes a lot of sense.

Do you still have to create a boot settings page and merge it with the application first?

RE: Create boot settings for nRF51822 using SDK_11.0.0

Vidar Berg — Mon, 12 Aug 2019 09:15:52 GMT

The legacy bootloader used a simpler format for the settings page that didn't require CRC, etc. Settings page structure for reference: bootloader_settings_t.

After you have programmed everything, you can mark the app as valid by writing BANK_VALID_APP (0x01) to the bank0 field at address 0x3FC000

With nrfjprog:

> nrjfprog --memwr 0x3FC00 --val 1

The other alternative is to initialize .bank0 to BANK_VALID_APP in your code to make this setting be a part of your merged hex file. But make sure to revert this change if you are later making a new bootloader image for a DFU.

RE: Create boot settings for nRF51822 using SDK_11.0.0

Phil — Sun, 11 Aug 2019 23:18:54 GMT

Correction: Boot-setting page is at 0x3F000. Boot-loader is at 0x3C000