Radio test sample physical UART interface is not working.

[Mads Sig]

Hi,

I am using the Radio test sample from NCS 2.3.0 nrf/samples/peripheral/radio_test.

I have made a build for the nrf52dk board and tested the UART command interface interface via the USB, it is working with output as expected.

When I load the same build on our target nrf52820 board and tested the physical UART connection, it does not work, no output is shown.

We are using the default pins UART TX(P0.06) and UART RX(P0.08), no overlay file is used.

Can you help me solving the problem with the physical UART interface for the radio test sample?

Br Mads.

[Håkon Alseth]

Hi,

 

Which board configuration have you targeted towards your nrf52820 device?

There's a nrf52833dk_nrf52820 board that uses P0.08/P0.06 for uart by default.

 

However, it will also enable DCDC and use external 32kHz source.

If your external board does not have one or both of these options, you should disable them using these configurations:

# Disable DCDC
CONFIG_BOARD_ENABLE_DCDC=n
# Enable internal 32k RC oscillator
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

 

Kind regards,

Håkon

[Mads Sig]

Hi,

Thanks, it works when updating the configuration.

Can you also help me with the overlay to use, if I want to change the pins used for UART RX/TX?

Br. Mads

[Håkon Alseth]

Hi Mads,

 

Here's an example of an overlay:

&pinctrl {
	uart0_my_custom_default: uart0_my_custom_default {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, X)>,
				<NRF_PSEL(UART_RX, 0, Y)>,
				<NRF_PSEL(UART_RTS, 0, Z)>,
				<NRF_PSEL(UART_CTS, 0, ZZ)>;
		};
	};
};

&uart0 {
	status = "okay";
        pinctrl-0 = < &uart0_my_custom_default>;
        pinctrl-1 = < &uart0_sleep >;

};

 

You can store this to boards/($BOARD).overlay, for instance boards/nrf52833dk_nrf52820.overlay

  

Kind regards,

Håkon

[Mads Sig]

Thanks for your quick answers, I have now been able to change the UART pins.

[Håkon Alseth]

Great to hear, Mads!

Always happy to help out. Hope you have a wonderful day!

 

Kind regards,

Håkon