nRF51822 s110 + TWI Crashes

[ypearson]

I'm testing out TWI on pins 24/25 and I get a crash when I attempt to do a TWI transfer and I find myself in: WDT_IRQHandler ()

I'm using much of the example code:

APP_TWI_INIT(&m_app_twi, &config, MAX_PENDING_TRANSACTIONS, err_code);

app_twi_transfer_t const lm75b_init_transfers[LM75B_INIT_TRANSFER_COUNT] = { APP_TWI_WRITE(LM75B_ADDR, default_config, sizeof(default_config), 0) };

app_twi_perform(&m_app_twi, lm75b_init_transfers, LM75B_INIT_TRANSFER_COUNT, NULL);

More precisely, the function

ret_code_t result = app_twi_schedule(p_app_twi, &internal_transaction);

doesn't return...

Also, all this happens before any ble stuff happens.

thanks!

[Einar Thorsrud]

Are you using the DK or a custom board? On the DK, pin 24 is connected to VDD via a LED and a resistor.

Can you disable the watchdog, disable compiler optimization and define DEBUG in the project/Makefile, then run the debugger? If the code ends up in a loop in the error handler, you can extract the file, line and return code of the error. If not it would be useful to step through the code and see where the problem occurs.