Application crash after disconnection

[julienh]

Hi,

I have an application with an accelerometer. This one communicate in I2C (TWI ). The accelerometer send a "data ready" signal every 20ms. I'm using the GPIOTE module to detect this signal and read the acceleration (I2C).

Each time I disconnect the Bluetooth, my application crash. I don't have any information to help me to debug on my app_error_handler. When this error happens, the execution stop at "Unknown funtion 0x000006B0".

1. I tried to disable data ready interuption on the accelerometer and the error disappear (seems to be related to a priority issue with GPIOTE / TWI and SoftDevice).
2. I thought that this issue was realated to a timing issue due to the GPIOTE interuption and TWI read during advertising start so I tried to disable GPIOTE on the data ready input when I have a disconnection event but that doesn't solve the problem.

I already saw another topic about that but the fix is not clear and I don't understand the root cause (devzone.nordicsemi.com/.../).

What I have understood from this topic is that I should use the ble_debug_assert_handler but I don't understand how to link this one with the app_error_handler. Do you have any example?

Any idea to help me to solve this issue? I'm on it since a while ...

Thanks

[julienh]

1. Yes I'm using S130 V2.0.1 which is in the SDK bundle (12.3).
2. I'm getting the message in debugger mode from Segger Embedded studio. When I disconnect the bluetooth, the execution is stopped with select active call frame "unknown function at 0x000006B0". In the call stack, the last called address is 0x000006B0. I tried a lot of things since yersterday but nothing to do... Still the same issue when I disconnect (and start again the advertising). If I don't start the advertising again, no problem.

Is that helpful if I create a case with my code?

GPIOTE is in low accuracy. TWI IRQ priority low.