Getting Started with NCS (NRF Connect SDK) with simple PWMs.

[c.tessierpiart]

Hi,

I trouble the support team for quite a few months now with NRF5 and I am now trying to get started with the up to date SDK and hopefully being able to get along with matter functionnalities.

I am using the SDK on VS Code and I find it a bit troubling how things works with Zephyr. I started on a standard blinky but I can't find any examples using Zephyr for a PWM or interrupt based events. So far my attempts at getting along the new SDK was applying changes in the zephyr.dts file : 

		pwm0: pwm@4001c000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x4001c000 0x1000 >;
			interrupts = < 0x1c 0x1 >;
			status = "okay";
			label = "PWM_0";
			#pwm-cells = < 0x1 >;
			ch0-pin = < 14 >;
			ch0-inverted;
			ch1-pin = < 15 >;
			ch1-inverted;
			ch2-pin = < 16 >;
			ch3-inverted;
			phandle = < 0x5 >;
		};
		
........................

	pwmleds {
		compatible = "pwm-leds";
		pwm_led0: pwm_led_0 {
			pwms = < &pwm0 14 >;
			label = "Voyant Rouge";
		};
		pwm_led1: pwm_led_1 {
			pwms = < &pwm0 15 >;
			label = "Voyant Vert";
		};
		pwm_led2: pwm_led_2 {
			pwms = < &pwm0 16 >;
			label = "Voyant Bleu";
		};
	};

I am then very concerned about the way to proceed, the blink exemple seems to use deprecated GPIO definitions (device_get_binding()) and I am not able to set up anything easily.

I hope you can make my way into this easier.

Best Regards,

Charles

[Priyanka]

Could you attach the detailed error message that you get?

-Priyanka

[c.tessierpiart]

Error: c:\Users\user\Desktop\project\project_app\build\nrf52840dk_nrf52840.dts.pre.tmp:680.1-8 syntax error
FATAL ERROR: Unable to parse input tree
CMake Error at C:\Users\user\ncs\v1.8.0\zephyr\cmake\dts.cmake:225 (message):
command failed with return code: 1
Call Stack (most recent call first):
C:\Users\user\ncs\v1.8.0\zephyr\cmake\app\boilerplate.cmake:545 (include)
C:\Users\user\ncs\v1.8.0\zephyr\share\zephyr-package\cmake\ZephyrConfig.cmake:24 (include)
C:\Users\user\ncs\v1.8.0\zephyr\share\zephyr-package\cmake\ZephyrConfig.cmake:35 (include_boilerplate)
c:\Users\user\Desktop\project\project_app\build\CMakeLists.txt:4 (find_package)

-- Configuring incomplete, errors occurred!
FATAL ERROR: command exited with status 1: 'c:\Users\user\ncs\v1.8.0\toolchain\opt\bin\cmake.EXE' '-DWEST_PYTHON=c:\Users\user\ncs\v1.8.0\toolchain\opt\bin\python.exe' '-Bc:\Users\user\Desktop\project\project_app\build' '-Sc:\Users\user\Desktop\project\project_app' -GNinja -DBOARD=nrf52840dk_nrf52840 -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=On -DNCS_TOOLCHAIN_VERSION:STRING=NONE -DBOARD_ROOT:STRING=c:/Users\user/Desktop/project/project_app -DCONFIG_DEBUG_OPTIMIZATIONS:STRING=y -DCONFIG_DEBUG_THREAD_INFO:STRING=y -DDTC_OVERLAY_FILE:STRING=c:/Users/user/Desktop/project/project_app/nrf52840dk_nrf52840.overlay -DCONF_FILE:STRING=c:/Users/user/Desktop/project/project_app\/prj.conf

[Priyanka]

We can take a look around now:

1. Have you made sure that you have taken CMakeLists and prj.conf back to how it was before you modified it?

CMakeLists:

prj.conf:

2. When you generate the build configuration, do you enable the debug option?

Also, could you tell me the path where you create the project folder?

-Priyanka

[c.tessierpiart]

Yes my files are the default files.

I created a directory in my desktop named project c:\Users\user\Desktop\project. Then I opened the empty directory with vs code and created the application with the name project_app.

I enabled the debug options.

[Priyanka]

Could you create the folder "projects" inside the c:\Users\user\ncs ?

Then, when you open the VS Code via Toolchain manager, click on "Create a new application from sample" and enter the details similar to as follows (your Application location will be c:\Users\user\ncs\projects)

And, later when generating the build configurations, do not enable the debug options.

Regards,

Priyanka