NRF9160 DK UART3 configuration

Question

Hi everyone, 
 I am working on a project with the NRF9160 DK where I want to use the UART3 channel. 
 The issue is that I got compiling errors when I add CONFIG_UART_3_NRF_UARTE =y to my proj.conf file (The solution was working fine before). 
 The errors I got are : 
 Building ‘zephyr/drivers/serial/libdrivers__serial.a’ from solution ‘build’ in configuration ‘Common’
 Compiling ‘uart_nrfx_uarte.c’
 'DT_NORDIC_NRF_UARTE_UART_3_CURRENT_SPEED' undeclared here (not in a function); did you mean 'DT_NORDIC_NRF_UARTE_UART_0_CURRENT_SPEED'?
 in expansion of macro 'UARTE_CONFIG'
 in expansion of macro 'UART_NRF_UARTE_DEVICE'
 'DT_NORDIC_NRF_UARTE_UART_3_BASE_ADDRESS' undeclared here (not in a function); did you mean 'DT_NORDIC_NRF_UARTE_UART_0_BASE_ADDRESS'?
 in expansion of macro 'UART_NRF_UARTE_DEVICE'
 'DT_NORDIC_NRF_UARTE_UART_3_TX_PIN' undeclared (first use in this function); did you mean 'DT_NORDIC_NRF_UARTE_UART_1_TX_PIN'?
 in expansion of macro 'UART_NRF_UARTE_DEVICE'
 each undeclared identifier is reported only once for each function it appears in
 in expansion of macro 'UART_NRF_UARTE_DEVICE'
 'DT_NORDIC_NRF_UARTE_UART_3_RX_PIN' undeclared (first use in this function); did you mean 'DT_NORDIC_NRF_UARTE_UART_0_RX_PIN'?
 in expansion of macro 'UART_NRF_UARTE_DEVICE'
 sched_priq.h
 kernel_includes.h
 kernel.h
 device.h
 uart.h
 uart_nrfx_uarte.c
 'DT_NORDIC_NRF_UARTE_UART_3_IRQ_0_PRIORITY' undeclared (first use in this function); did you mean 'DT_NORDIC_NRF_UARTE_UART_1_IRQ_0_PRIORITY'?
 in definition of macro '__DEBRACKET'
 in expansion of macro '__GET_ARG2_DEBRACKET'
 in expansion of macro '__COND_CODE'
 in expansion of macro 'Z_COND_CODE_1'
 in expansion of macro 'COND_CODE_1'
 in expansion of macro 'Z_ARCH_IRQ_CONNECT'
 in expansion of macro 'IRQ_CONNECT'
 in expansion of macro 'UART_NRF_UARTE_DEVICE'
 'DT_NORDIC_NRF_UARTE_UART_3_IRQ_0' undeclared (first use in this function); did you mean 'DT_NORDIC_NRF_UARTE_UART_0_IRQ_0'?
 in definition of macro '__DEBRACKET'
 in expansion of macro '__GET_ARG2_DEBRACKET'
 in expansion of macro '__COND_CODE'
 in expansion of macro 'Z_COND_CODE_1'
 in expansion of macro 'COND_CODE_1'
 in expansion of macro 'irq_enable'
 in expansion of macro 'UART_NRF_UARTE_DEVICE'
 uart.h
 uart_nrfx_uarte.c
 'DT_NORDIC_NRF_UARTE_UART_3_LABEL' undeclared here (not in a function); did you mean 'DT_NORDIC_NRF_UARTE_UART_1_LABEL'?
 in definition of macro 'DEVICE_AND_API_INIT'
 in expansion of macro 'DEVICE_DEFINE'
 in expansion of macro 'UART_NRF_UARTE_DEVICE'
Build failed 
 How can I properly configure the UART3 to get it working ? 
 Thanks in advance. 
 Thomas

Håkon Alseth · Accepted Answer

Hi,

Do you have a nrf9160_pca10090ns.overlay file in your application folder?

If not, could you try creating one with this content (0xFFFFFFFF disables the specific feature, CTS and RTS in this case):

&uart3 {
    status = "okay";
    current-speed = <115200>;
	tx-pin = <10>;
	rx-pin = <11>;
	cts-pin = <0xFFFFFFFF>;
	rts-pin = <0xFFFFFFFF>;
};

Note that you have to reimport (check the "clean build folder" box) the project in SES to reload this configuration.

Kind regards,

Håkon

NRF9160 DK UART3 configuration

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