Debugger goes to 0x00000A60, then stuck at 0x00025F54

[oskarbjo]

Hello,

I am developing a custom board using NRF52820 and I am trying run the Blinky example on it with no success. 

I am trying to adapt the blinky example for PCA10056_S140 and have changed the preprocessor definitions to:

APP_TIMER_V2
APP_TIMER_V2_RTC1_ENABLED
BOARD_PCA10100
CONFIG_GPIO_AS_PINRESET
FLOAT_ABI_HARD
INITIALIZE_USER_SECTIONS
NO_VTOR_CONFIG
NRF52820_XXAA
NRF_SD_BLE_API_VERSION=7
S140
SOFTDEVICE_PRESENT

The code compiles but when I try to program the chip with my JLink the debugger first reaches 'unknown function 0xA60' and then gets stuck at 'unknown function' 0x00025F54. Any ideas? Thanks.

Oskar

[Priyanka]

Hi Oskar,

Could you try referring to this similar thread.

Regards,

Priyanka

[oskarbjo]

Hi,

I've seen that thread already, I have configured my project for PCA10100 as far as I understand:

- I have changed the preprocessor definitions

- I have replaced the files "ses_startup_nrf52840.s" and "system_nrf52840.c" with "ses_startup_nrf52820.s" and "system_nrf52820.c" 

- I have changed the target device to NRF52820

- I have replaced "../modules/nrfx/mdk/nrf52840.svd" with "../modules/nrfx/mdk/nrf52820.svd"

Is there anything missing? 

[oskarbjo]

I just tried running the UART example where a version for PCA10100 is provided directly but that does not seem to work either. I am concerned the chip might be damaged - is there any way for you to find out what function 0x00025F54 corresponds to? 

[Priyanka]

Hi Oscar,

Have you changed the maximum RAM and flash size of the nRF52820? Kindly check this and let me know how it goes.

-Priyanka

[oskarbjo]

Hello,

I did manage to upload my firmware in the end- using the linker settings in example project "pca10100e" did the trick. Thank you