Change PHY mode to CODED while connected.

[Daniel]

Hey,

I neet to change the PHY mode of my connection between nRF52840 DK and OnePlus6 (Android 9) to CODED PHY. If I try to change it, I'm always getting an fatal error and the system restarts.

I do sd_ble_gap_phy_update(..) like in the nrf image transfer demo and update PHYs when receiveing commands.

This works pretty well with 1M and 2M PHY modes. The connection is updating. CODED PHY mode = fatal error.

I'm using SDK 15.2 and s140_nrf52_6.1.0_softdevice.

Best regards,

Daniel

[Andy]

What error do you get?

[Daniel]

I get an app: Fatal error immediately after calling sd_ble_gap_phy_update(), so no error code is returned. App crashes and restarts.

[Andy]

If it crashes and restarts then it's going to an error handler somewhere. Is it crashing directly on sd_ble_gap_phy_update() or in the APP_ERROR_CHECK after that?

[Daniel]

Hmm I don't know where to figure out which error it is without getting a ret_code.

I'm just connected via HTerm and see the logs.

Direct on sd_ble_gap_phy_update(), APP_ERROR_CHECK() never executes.

[haakonsh]

I suggest you enter into a proper debug session and see what error info is passed to the error handler. 

[Daniel]

Okay, found the error now.

err_code=0x000000011 as invalid data.

I fixed an error with my conn_handle parametre and now the phy is changing (I think).

At ble_evt_handler() I get the correct BLE_GAP_EVT_PHY_UPDATE event, logged PHY values are correct, but then the app is running into an error again -> NRF_BREAKPOINT_COND and NO error handler is triggered.

[Daniel]

I also tested the nordic ble_app_att_mtu_throughput example with two nrf52840 DKs and it seems like I'm running into the same fatal error when changing the PHY mode to CODED.

The peripheral board causing this error..