Enable PWM in SDK Mesh 2.1.1 light_switch_example (server)

[Paulo.Zacarias]

Hi,

I'm having troubles adding PWM in light_switch_proxy_server example in Mesh SDK v. 2.1.1.

It seems that the PWM driver and instances are not correctly enabled, looking at the nrfx_pwm.h:

And also looking at the nrfx_pwm.c, where everything looks disabled:

Steps I have done:

1. Included header file "nrf_drv_pwm.h" in main.c

2. Edited Project Options -> Preprocessor with the path to the needed header files:

$(SDK_ROOT:../../../../nRF5_SDK_15.0.0_a53641a)/integration/nrfx/legacy

$(SDK_ROOT:../../../../nRF5_SDK_15.0.0_a53641a)/modules/nrfx/drivers/include

3. Added to the project (into the folder nRF5 SDK) the file "nrfx_pwm.c"

4. Enabled the PWM peripheral driver and PWM0 instance in the sdk_config.h:

#ifndef NRFX_PWM_ENABLED
#define NRFX_PWM_ENABLED 1
#endif

#ifndef NRFX_PWM0_ENABLED
#define NRFX_PWM0_ENABLED 1

I have done the same steps successfully for the light_switch_server (NO proxy) in Mesh 2.0.1, so I don't know what I'm missing now...

Is there any other file that needs to be edited to enable PWM?

Or there is any way to find out which file NRFX_CHECK() is looking at?

Regards,
Paulo Zacarias

[Paulo.Zacarias]

Hi,

I just confirm that this is a problem with Mesh SDK 2.1.1.

I tried again using a fresh new project to add PWM to the light_switch server and proxy_server on Mesh SDK 2.0.1, both worked fine.

On 2.1.1 it fails to build due to the issue I described previously, on both server and proxy_server examples!

Any idea how to fix this?

Thank you!

Regards,
Paulo Zacarias

[Bjørn Kvaale]

Hi Paulo,

Very sorry for the delayed response. Do you still want to use mesh sdk v2.1.1 or would you rather use the latest v2.2.0? There have been a few changes that might be useful for you. I will check out what is going wrong as soon as you let me know which mesh sdk you would like to use. Have you already taken a look at the documentation provided here (v2.1.1 & v2.2.0)?

Kind Regards,

Bjørn

[Bjørn Kvaale]

Hi Paulo,

I am taking a look at it now. I believe it has something to do with the sdk_config file. I tried copying the sdk_config.h file from sdk 15.0.0 & then the error did not appear anymore. I tried updating the config file from sdk 15 to include all of the mesh related things, but then I received quite a few linking errors. I will update this thread when I have more info.

Regards,

Bjørn

[Paulo.Zacarias]

Hi,

To which sdk_config are you referring to?

Is it the one that is inside: \examples\light_switch\proxy_server\include\ ?

Because I compared that one from Mesh SDK 2.0.1 and Mesh SDK 2.1.1 and they are identical.

BR,
Paulo Zacarias

[Paulo.Zacarias]

Hi,

Today I tried to enable PWM driver in Mesh SDK 2.2.0.

Got exactly the same error: 'NRFX_PWM0_INST_IDX' undeclared here (not in a function)

[Paulo.Zacarias]

I finally found the solution here.

I completely removed code section that as the reference to the legacy driver, PWM_ENABLED, in sdk_config:

// <e> PWM_ENABLED - nrf_drv_pwm - PWM peripheral driver - legacy layer
//==========================================================
#ifndef PWM_ENABLED
#define PWM_ENABLED 0
#endif

It seems that for some reason sdk_config.h  doesn't show up in the dependencies of main.c on Mesh SDK 2.0.1 proxy_server example:



But it does for 2.1.1 and 2.2.0, maybe that's the reason why this issue only showed up in this newer releases.

BR,
Paulo Zacarias

[Bjørn Kvaale]

Hi Paulo,

Great to hear that you figured it out! I was referring to the sdk_config.h header file from sdk 15. When I used that sdk_config file, I did not receive the same error.

It is also worth mentioning that there is an experimental dimming example in the mesh sdk v2.2.0 that uses PWM from SDK 15. I was made aware of this today.

Kind Regards,

Bjørn