change uart0 for log

[iamcfc]

Hi, 

    I wish to show log information use uart0 for nrf52833. And change tx to pin 0.9, rx to pin 0.10. So I modified conf file as 

CONFIG_BT_DEBUG_LOG=y
CONFIG_LOG=y
CONFIG_UART_CONSOLE=y
CONFIG_LOG_BACKEND_UART=y
CONFIG_LOG_PRINTK=y

add overlay file as

&uart0 {
	current-speed = <115200>;
	pinctrl-0 = <&uart0_default_alt>;
	pinctrl-1 = <&uart0_sleep_alt>;
	pinctrl-names = "default", "sleep";
};

&pinctrl {
	uart0_default_alt: uart0_default_alt {
		group1 {
			psels = <NRF_PSEL(UART_RX, 0, 9)>,
				<NRF_PSEL(UART_TX, 0, 10)>;
		};
	};

	uart0_sleep_alt: uart0_sleep_alt {
		group1 {
			psels = <NRF_PSEL(UART_RX, 0, 9)>,
				<NRF_PSEL(UART_TX, 0, 10)>;
			low-power-enable;
		};
	};
};

I use printk to print log message, but can not find message on console. Is my setting correct, thank you

[iamcfc]

I Found P0.9 and P0.10 not suitable for uart, when I delete conf setting and change pins, it can work.

[Håkon Alseth]

Hi,

 

P0.09 and P0.10 are by default used for NFC. To use these as GPIOs, you will need to add this configuration:

CONFIG_NFCT_PINS_AS_GPIOS=y

 

Please note that if you use the DK, you need to adjust some 0-ohm resistors as well:

https://infocenter.nordicsemi.com/topic/ug_nrf52833_dk/UG/dk/hw_nfc_if.html?cp=5_1_4_7_10

 

Kind regards,

Håkon

[iamcfc]

The question has been solved when I add the given configuration, thanks a lot.

[Håkon Alseth]

That is great to hear. I hope you have a wonderful day!

 

Kind regards,

Håkon