Error : undefined reference to '__device_dts_ord_18'

[sachinjairam]

Hai, I am trying to read ADC values for Nucleo-H743ZI board with Zephyr microROS.
But, while building the firmware an unknown error occurs.

I couldn't find any solution. So please advise me how to solve this problem.

Thank you,
Sachin

[FRASTM]

@sachinjairam could you please give more details about the application you are building
For example dev is the
const struct device *dev_adc = DEVICE_DT_GET(ADC_NODE);
when building the ./samples/drivers/adc for the nucleo_h743zi target board which has an overlay made of

/ {
	zephyr,user {
		/* adjust channel number according to pinmux in board.dts */
		io-channels = <&adc1 1>;
	};
};

[sachinjairam]

Hai, @FRASTM thanks for your reply.
I am trying to read ADC values from ADC1_INP15 of NUCLEO-H743ZI-Q board. here dev is the
const struct device *dev_adc = DEVICE_DT_GET(ADC_NODE);
and an overlay made of

/ {
	zephyr,user {
		/* adjust channel number according to pinmux in board.dts */
		io-channels = <&adc1 15>;
	};
};

Thank you.

[FRASTM]

Your talking about the NUCLEO-H743ZI-Q board, do you have the same board definition (dts) as the NUCLEO-H743ZI including the nucleo_h743zi_q.overlay

[sachinjairam]

I am using NUCLEO-H743ZI-Q board with nucleo_h743zi.dts and nucleo_h743zi.overlay files.

[FRASTM]

I do not know what is the diff between the nucleo_h743zi and your NUCLEO-H743ZI-Q board
Based on the nucleo_h745zi_q definition that could be a matter of SMPS regulator

[FRASTM]

With that overlay

/ {
	zephyr,user {
		/* adjust channel number according to pinmux in board.dts */
		io-channels = <&adc1 15>;
	};
};

there is no pb to run the samples/drivers/adc :

*** Booting Zephyr OS build v3.0.0-rc1-92-g6393d650fc12*
ADC reading: 649                                        
ADC reading: 649                                        
ADC reading: 648                                        
ADC reading: 648                                        
ADC reading: 645                                        

Also runs the tests/drivers/adc/adc_api using the ADC1 channel 15 for the nucleo_h743zi board