Nrf54l15 uses direct_test_mode, setting UART 20 is invalid

[john.liu]

Hi:

My board(nrf54l15) needs to direct testing,I changed the uart20 pin, but it doesn't work

&pinctrl {
    uart20_default: uart20_default {
        group1 {
            psels = <NRF_PSEL(UART_TX, 1, 7)>, <NRF_PSEL(UART_RX, 1, 5)>;
        };
    };

    uart20_sleep: uart20_sleep {
        group1 {
            psels = <NRF_PSEL(UART_TX, 1, 7)>, <NRF_PSEL(UART_RX, 1, 5)>;
            low-power-enable;
        };
    };
};

[Vidar Berg]

Hello,

The pins should be available if this is on a custom board you have, so it's difficult to say what's wrong without some more troubleshooting. Have you tried other samples such as "uart echo" to check if you are able to receive and transmit on these pins?

Best regards,

Vidar 

[john.liu]

Hi:
I'm sure using P1x is possible, but changing it to P00~P03 won't work with UART 20.Use custom board.I am very confused！

/ {
	chosen {
		ncs,dtm-uart = &uart20;
	};
};

&uart20 {
	status = "okay";
	current-speed = <19200>;
	pinctrl-0 = <&uart20_default>;
	pinctrl-1 = <&uart20_sleep>;
	pinctrl-names = "default", "sleep";	
};

&radio {
	status = "okay";
	/* This is a number of antennas that are available on antenna matrix
	 * designed by Nordic. For more information see README.rst.
	 */
	dfe-antenna-num = <12>;
	/* This is a setting that enables antenna 12 (in antenna matrix designed
	 * by Nordic) for PDU. For more information see README.rst.
	 */
	dfe-pdu-antenna = <0x0>;

	/* These are GPIO pin numbers that are provided to
	 * Radio peripheral. The pins will be acquired by Radio to
	 * drive antenna switching.
	 * Pin numbers are selected to drive switches on antenna matrix
	 * desinged by Nordic. For more information see README.rst.
	 */
	dfegpio0-gpios = <&gpio0 4 0>;
	dfegpio1-gpios = <&gpio0 5 0>;
	dfegpio2-gpios = <&gpio0 6 0>;
	dfegpio3-gpios = <&gpio0 7 0>;
};

&uart30 {
    status = "disabled";
};

&pinctrl {
  /delete-node/ uart20_default;
  /delete-node/ uart20_sleep;
	uart20_default: uart20_default {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 0)>;//psels = <NRF_PSEL(UART_TX, 1, 4)>;
		};
		group2 {
			psels = <NRF_PSEL(UART_RX, 0, 1)>;//psels = <NRF_PSEL(UART_RX, 1, 14)>;
			bias-pull-up;
		};
	};
	uart20_sleep: uart20_sleep {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 0)>, //psels = <NRF_PSEL(UART_TX, 1, 4)>;
				<NRF_PSEL(UART_RX, 0, 1)>;//psels = <NRF_PSEL(UART_RX, 1, 14)>;
			low-power-enable;
		};
	};
};