Radio mode configuration in nrf52832

[Hemabas]

Hi, we made a custom board with nrf52832 and flashed example code experimental_ble_app_proximity from sdk15.

We are trying to change the radio mode to 2Mbits/sec BLE.

While trying to set the values in radio MODE register before ble_stack_init() in main function, the value have been set.

But when I am reading the register value at the end of main(), it is reading default value(1 Mbits/sec nordic proprietary radio mode  is set).

And while trying to set the values in radio mode register after ble_stack_init() in main(), fatal error occurs.

Is there any dependency for setting MODE register?

Regards

Hemabas

[Jørgen Holmefjord]

Hi,

The RADIO peripheral is blocked by the softdevice when this is enabled. Trying to modify the registers directly will lead to invalid memory address error and a softdevice assert. You need to configure the softdevice to use 2 Mbit PHY, using softdevice API.

Note that it is not possible to advertise on 2 Mbit PHY according to Bluetooth specifications. You can either send a PHY update request after connection, or you can set secondary PHY in the advertising configuration, to allow devices to connect on 2 Mbit PHY.

Best regards,
Jørgen