nRF52840 zephyr light control example / Can't find PWM_0

[masak]

Hi,

I was following the example posted on the below link.

https://devzone.nordicsemi.com/nordic/nrf-connect-sdk-guides/b/getting-started/posts/nrf-connect-sdk-tutorial---part-2-ncs-v1-4-0

It is called, light controller.

My board is nRF82540DK.

When it runs, the serial monitor spits out this, Can't find PWM_0".

In the prj.conf file, CONFIG_PWM=y is stated.

I also enabled the PWM (Pulse Width Modulation) Drivers by the "ninja menuconfig".

What else am I missing?

Thanks,

masakura

[Simon]

I was not able to reproduce this. I followed all the steps in 3.2 Set it up, and ended up with this sample:

7853.light_controller.7z

Then I opened the command line and redirected to the location of the sample, and run these commands:

west build -b nrf52840dk_nrf52840 -d build_52840dk
cd build_52840dk
west flash

Then I observed that LED1 was generating a sawtooth wave.

Best regards,

Simon

[Simon]

There are currently some problems with Devzone, that if you edit a reply, the uploaded file gets corrupted. I'll upload it again:

8154.light_controller.7z

[masak]

Hi,
This thing is very strange. Right after I issued this ticket, I was looking to various files to figure out the issue. Then I came across this to resolve the issue, which was to replace the first two lines with the following two lines below.

//#define PWM_DEVICE_NAME DT_PROP(DT_NODELABEL(pwm0), label)
//#define PWM_CH0_PIN DT_PROP(DT_NODELABEL(pwm0), ch0_pin)

#define PWM_DEVICE_NAME DT_PROP(DT_N_NODELABEL_pwm0, label)
#define PWM_CH0_PIN DT_PROP(DT_N_NODELABEL_pwm0, ch0_pin)

But when I ran the very original code (with the first two lines above and commented out the last two lines) today, it is working. I have no idea why. Anyway, thanks for your help and hoping that this thing never happen.

Thanks,
Masakura 

[Simon]

Maybe it was a cosmic ray?  Anyway, I'm glad you got it working and good luck with your project.