MPU9255 + nrf52 (PCA10040)

[Andres Zubillaga]

Hello,

I am currently using SEGGER studio with SDK11 and the MPU9255 repository from github.com/.../nrf5-mpu-examples . I followed the installation instructions in the repository. Then I installed Segger Studio and used the tutorial to develop in older SDKs in -> devzone.nordicsemi.com/.../

I have managed to compile the program with no errors or warnings, however I see no device when scanning for BLE and I see no output in Tera Terminal. I used the Segger debugger and the PC register seems to be having problems. The debugger will not move any further after a specific point and the Target Output says "Stopped by a vector catch".

foto.jpg

Any suggestions on what I can do to fix this issue?

[Joakim Jakobsen]

Hi Andres.
This might be caused by wrong memory settings. Which values are you using for FLASH_START and RAM_START?
We also have a youtube-tutorial about how to debug in SEGGER Embedded Studio, you can take a look at that here.
Best regards.

[Andres Zubillaga]

Hi Joakim,

My current settings are: FLASH_START=0x1F000 SRAM_START=0x20002000

Those were the settings the tutorial suggested. I am taking a look at the video-tutorials. I'll post an update if i have any success with them.

[Joakim Jakobsen]

Try changing the settings to:

FLASH_START = 0x1C000  
SRAM_START = 0x20002080

Let me know if that doesn't help, and we will find another solution.
Best regards.

[Andres Zubillaga]

Hi Joakim,

I changed the settings to your suggestion and there has been an improvement. Now the program compiles to the point where a print statement in the main function gets triggered.

However,in the disasembly window the app error handler is outputted 4 times for the following functions:

ble_advertising_start(), mpu_setup() and uart_config()

However, when I try to look at the call stack for the app_error_handler I cannot see the errors even though I toggled a breakpoint in error_info_t error_info in void app_error_handler in the app_error.c file. I tried to follow the debugging video by Nordic in Youtube but I do net get an error output in the call stack.

[Joakim Jakobsen]

Hi again.
Hard to say what might be the issue with limited information. I'll try to import the project to SES myself, to see if I get the same errors that you do. I'll get back to you.
Best regards.