How to make nrf51422 boot loader work in NRF51822

[superman]

Hi,

I am using SDK 10 and Dev kit nrf51422 and used \nRF51_SDK_10.0.0_dc26b5e\examples\dfu\bootloader\pca10028\dual_bank_ble_s110\arm5_no_packs to make the bootloader work. It works fine. Now i need to make it work in nrf51822. When i used same boot loader, sfotdevice, app it does not work. The chip never responds.
Please help. Thanks

[bjorn-spockeli]

Which nRF51822 variant are you using(QFAA, QFAC, ...) ? Can you post the chip marking of the nRF51822 chip that you're using?

[superman]

QFAC. But i got it working, by using internal RC oscillator. One more thing is, the bootlaoder always thinks that there is not valid app even though i have a valid app there. bootloader_app_is_valid(DFU_BANK_0_REGION_START) always gives false. Is there any fix for this? The fix 1- devzone.nordicsemi.com/.../ fix 2- i removed that function from checking for valid app.

[bjorn-spockeli]

In order to flash a combined SoftDevice, Bootloader and Application, where the device jumps to the application without having to perform a OTA update to set the valid application flag, you have to set the BANK_VALID_APP flag in bootloader_settings.c, i.e. change the line

uint8_t  m_boot_settings[CODE_PAGE_SIZE]    __attribute__((at(BOOTLOADER_SETTINGS_ADDRESS))) __attribute__((used));   

to the following

uint8_t  m_boot_settings[CODE_PAGE_SIZE]    __attribute__((at(BOOTLOADER_SETTINGS_ADDRESS))) __attribute__((used)) = {BANK_VALID_APP};

-Bjørn