'NRFX_PWM0_INST_IDX' undeclared here (not in a function); did you mean 'NRFX_PWM_INSTANCE'?

[fab]

I am integrating PWM into my project which uses SDK_15.2.0.

My config.sh contains:

#define NRFX_PWM_ENABLED 1

#define NRFX_PWM0_ENABLED 1

and I have included nrfx_pwm.c.

Compiling the project I get this error:

'NRFX_PWM0_INST_IDX' undeclared here (not in a function); did you mean 'NRFX_PWM_INSTANCE'?

Trying to sort this problem out, I realized that the nrfx_pwm.c is completely grayed out. It starts with:

#if NRFX_CHECK(NRFX_PWM_ENABLED)
....

 Hence, apparently NRFX_PWM_ENABLED is not defined.

How do I fix this?

[Simonr]

Hi Fabrizio

What do you mean by "grayed out"? Have you added all header files necessary for nrfx_pwm.c to your project?

Best regards,

Simon

[fab]

Hi Simonr,

I mean that SES shows the code grayed and AFAK this means that it's not compiled because NRFX_PWM_ENABLED is not defined.

I don't know if I have included all header files required for nrfc_pwm.c. Which are they?

Thank you.

[Simonr]

Hi Fabrizio

Check that you have added the following header files to your project:

nrfx.h
nrf_pwm.h
nrf_gpio.h
nrfx_log.h
nrf_egu.h

Also note that it isn't enough to just drag and drop them into your project. You have to add them by means of the include path setting. If you are not sure how to do this, please refer to our SES video tutorials.

Could you also check what happens if you try to build your project?

Best regards,

Simon

[fab]

Hi Simon,

I sorted it out. The problem was in the config.h.

I configured only:

#define NRFX_PWM_ENABLED 1

also these were required:

#define PWM_ENABLED 1
#define PWM0_ENABLED 1

I don't know why, though.

Thank you for your support.

[Arian TLK]

Hi Simonr

I've been facing same problem in the ble_app_blinky_pca_s132 example when trying to use PWM in it and no matter what's enabled or not, still having same error. I've already enabled all of the sdk_config.h configs needed, also included all of the header files.

Do you think it could be a problem related to SDK17.0.2 and SES or maybe I'm missing something.

Thank you.