Problem with UART0 on nRF9160dk

RE: Problem with UART0 on nRF9160dk

Adeel — Wed, 30 Sep 2020 11:35:02 GMT

Hi,

I get Kconfig errors when I try to use either UART 1 or UART 2. Anything else to change apart from this ?

What could be the reason for the KConfig errors and how can I get rid of that ?

Regards,

Adeel.

RE: Problem with UART0 on nRF9160dk

Jagruti — Tue, 25 Aug 2020 12:42:53 GMT

Hello Parth Sagar

These are the prj.conf and nrf9160_pca10090ns.overlay files:

prj.conf:

CONFIG_SERIAL=y
CONFIG_TRUSTED_EXECUTION_NONSECURE=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_UART_1_NRF_UARTE=y
CONFIG_UART_0_NRF_UARTE=y
CONFIG_UART_2_NRF_UARTE=y
CONFIG_BSD_LIBRARY_TRACE_ENABLED=n

nrf9160_pca10090ns.overlay:

&uart0 {
	status = "okay";
	current-speed = <115200>;
	tx-pin = <16>;
	rx-pin = <14>;
	rts-pin = <0xFFFFFFFF>;
	cts-pin = <0xFFFFFFFF>;
};

&uart1 {
	status = "okay";
	current-speed = <115200>;
	tx-pin = <1>;
	rx-pin = <0>;
	rts-pin = <0xFFFFFFFF>;
	cts-pin = <0xFFFFFFFF>;
};

&uart2 {
	status = "okay";
	current-speed = <115200>;
	tx-pin = <10>;
	rx-pin = <11>;
	rts-pin = <0xFFFFFFFF>;
	cts-pin = <0xFFFFFFFF>;
};

To use UART0, you need to change the pin configuartion in overlay file of SPM

nrf9160_pca10090.overlay for SPM:

&uart0 {
	status = "okay";
	current-speed = <115200>;
	tx-pin = <16>;
	rx-pin = <14>;
	rts-pin = <0xFFFFFFFF>;
	cts-pin = <0xFFFFFFFF>;
};

Best Regards,

Jagruti

RE: Problem with UART0 on nRF9160dk

Parth Sagar — Mon, 24 Aug 2020 16:17:46 GMT

Hi Jagruti,

I am kind of facing a similar problem. For me even the UART1 isnt working. Can you share the details of the prj.cfg and overlay files of your working UART1?

RE: Problem with UART0 on nRF9160dk

Håkon Alseth — Fri, 24 Jan 2020 11:27:08 GMT

Hi,

How have you enabled UART2?

Here's a thread listing the configuration to enable both in prj.conf and to define it in dts:

https://devzone.nordicsemi.com/f/nordic-q-a/49797/using-uart2-in-asset_tracker-example

Could you try those configs and see if that works?

Kind regards,

Håkon

RE: Problem with UART0 on nRF9160dk

Jagruti — Thu, 23 Jan 2020 16:58:16 GMT

I am able to change the UART0 pins to 10 and 11. I just changed SPM overlay file and I did not make any changes to dts compiled file. The pins are changed. So UART0 and UART1 are working. But still I can't use UART2. There is always error after compiling. It shows UART 2 is undeclared.

RE: Problem with UART0 on nRF9160dk

Jagruti — Thu, 23 Jan 2020 15:31:25 GMT

Hi,

I tried to use UART 2. For that I changed overlay file in spm, nrf9160_pca10090ns.dts_compiled files for UART and SPM. While compiling there is error in uart_nrfx_uarte.c file. After starting SES it always modify nrf9160_pca10090ns.dts_compiled file for UART and come backs to previous values. I am not understanding how to use UART2 and how to assign external gpio pins to UART0 or UART1. For UART program there is no overlay file.

RE: Problem with UART0 on nRF9160dk

Håkon Alseth — Thu, 23 Jan 2020 11:37:44 GMT

Hi,

Could you try to add your .overlay configuration to the SPM?

This is done by creating "../nrf/samples/nrf9160/spm/nrf9160_pca10090.overlay" and adding your &uart0 configuration.

Note: you need to re-import the project in SES (or regenerate using CMake) to get the new overlay to take effect.

Kind regards,

Håkon