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..

[haakonsh]

That's strange. What version of the PCA10056 are you using? 

NRF_BREAKPOINT_COND recides in the error handler, there should be an error code, line number, and file name available. 

[Andy]

0x11 isn't invalid data, it's busy.

From the documentation:

 * @retval ::NRF_ERROR_BUSY Procedure is already in progress or not allowed at this time. Process pending events and wait for the pending procedure to complete and retry.

[Daniel]

Oh wow. It is working now...

I always used my PCA10056 V0.9.0 2017.10  and V0.9.2 2017.27 and it always crashed while updating PHY to CODED.

NOW i'm using the PCA10056 V1.0.0 2018.45 and it works.. No problems while updating my PHY modes to 1M, 2M and CODED.

Not sure why it works now, I changed nothing. Maybe I can figure out the error, which occurs in the older versions.

Thanks for your help, haakonsh!