PWM app hangs on app_pwm_channel_duty_set with softdevice s110

RE: PWM app hangs on app_pwm_channel_duty_set with softdevice s110

northernLight — Thu, 24 Jan 2019 22:19:22 GMT

Kenneth,

Many thanks for your helpful prompts. It finally worked when I modified the Cortex_M_startup.s file using externalISR names from ses_nrf51_startup.s. Both files attached.

Your suggestion that:

'I think the problem here is that the timer irq handler is not enabled somehow'

was correct !!!

devzone.nordicsemi.com/.../Cortex_5F00_M_5F00_Startup.s

devzone.nordicsemi.com/.../ses_5F00_nrf51_5F00_startup.s

RE: PWM app hangs on app_pwm_channel_duty_set with softdevice s110

Kenneth — Wed, 23 Jan 2019 20:45:41 GMT

I was not aware you have ported this to Segger Embedded Studio, I am using Keil.

I assume you have looked at:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.gs.ses/dita/gs/developing/import_ses.html?cp=1_1_0_7_1

There is also this guide:
https://devzone.nordicsemi.com/b/blog/posts/segger-embedded-studio-a-cross-platform-ide

Sometimes downloading the exact version mentioned may be a good idea.

Have you considered using the nRF52-series? All the new SDK examples support Segger Embedded Studio. Also the nRF52-series have a hardware PWM module.

Best regards,
Kenneth

RE: PWM app hangs on app_pwm_channel_duty_set with softdevice s110

northernLight — Wed, 23 Jan 2019 16:54:58 GMT

Many thanks for the check and the help with the problem solving.

The issue might be the project set-up created by the import. The import function adds two *.s files that are different from those in earlier documentation, as you can see from the screenshot attached. Are these the same as on your set-up?

BTW which preprocessor definitions did you use?

The old documentation says:

Add the definition NO_VTOR_CONFIG to the Preprocessor Definitions. If there is a softdevice

Many thanks

Rob

RE: PWM app hangs on app_pwm_channel_duty_set with softdevice s110

Kenneth — Wed, 23 Jan 2019 12:45:43 GMT

I replaced main.c in the mentioned SDK project, and it compiles and run fine here on a nRF51-DK. Not sure what the problem is on your end though. Maybe you need to send the entire project.

Best regards,
Kenneth

RE: PWM app hangs on app_pwm_channel_duty_set with softdevice s110

northernLight — Tue, 22 Jan 2019 23:25:19 GMT

Thankyou for the reply. Unfortunately I am still stuck. The default example is indeed the one I have been using which includes the instantiation you highlighted in main.c

Specifically I imported the project

nRF51_SDK_10.0.0_dc26b5e\examples\peripheral\pwm\pca10028\arm5_no_packs\pwm_pca10028.uvprojx

Imported as Keil MDK. The device is 51822QFAA

The problem of an infinite while loop has been reported elsewhere but is _not_ occurring here (main.c line 69).

Instead in main.c line 69 the call to app_pwm_channel_duty_set does not return at all. Is this consistent with failure to enable the timer IRQ handler?

How do I test whether the IRQ handler has been enabled?

When I step through the code it hangs on line 549 in app_pwm.c:

return app_pwm_channel_duty_ticks_set(p_instance, channel, ticks);

devzone.nordicsemi.com/.../63057.main.c

RE: PWM app hangs on app_pwm_channel_duty_set with softdevice s110

Kenneth — Tue, 22 Jan 2019 13:09:07 GMT

Hi,

Think you will have to take a look at the default example again and make sure it runs as expected:

\nRF51_SDK_10.0.0_dc26b5e\examples\peripheral\pwm

I think the problem here is that the timer irq handler is not enabled somehow. This should be set in main.c by adding:

APP_PWM_INSTANCE(PWM1,1); // Create the instance "PWM1" using TIMER1.