watchdog reset after PWM

RE: watchdog reset after PWM

air — Mon, 17 Jul 2017 10:45:59 GMT

It's system on sleep. I use GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS : 12. I checked to use more than 4 channels from your co-worker. And I think this problem is related with the app_timer. I asked this today.

Hellow,

I'm using app_timer to play the buzzer.

The default behavior is 1. key in 2. timer start: 8Sec for key action stop check 3. Buzzer on (pwm1) 3. buzzer timer start 4. Buzzer timer stop. 5. buzzer off

The odd thing is 1. Abnormal termination of the timer occurs. - The 8 second timer in process 2 is terminated as soon as it starts. - Due to this phenomenon, abnormal operation of the buzzer makes the overall wrong operation. Below is a log message. The current issue is being debugged for a few days now. Help is urgently needed.

Thank you.

// * normal message 0> key in : touch 1 0> key action : touch 1 0> timer - normal start 0> buzzer start 0> buzzer timer start : 0 0> pwm-buzzer uninit error : 0 0> pwm-buzzer init error : 0 0> pwm-buzzer enable 0> pwm-buzzer duty set 0> sleep 0> buzzer timer stop : 0 0> timer handler 0> buzzer timer start : 0 0> pwm-buzzer uninit error : 0 0> pwm-buzzer init error : 0 0> pwm-buzzer enable 0> pwm-buzzer duty set 0> sleep 0> buzzer timer stop : 0 0> timer handler 0> buzzer stop 0> sleep *

// * abnormal message 0> key in : touch 1 0> key action : touch 1 0> timer : normal start 0> buzzer start 0> timer : normal end --->>> abnormal timer stop !!!!!!! 0> buzzer start --->>> another buzzer start when time stopped : not acceptable !!! 0> buzzer timer start : 0 0> pwm-buzzer uninit error : 0 0> pwm-buzzer init error : 0 0> pwm-buzzer enable 0> pwm-buzzer duty set 0> buzzer timer stop : 0 0> buzzer timer stop : 0 0> timer handler 0> buzzer timer start : 0 0> pwm-buzzer uninit error : 0 0> pwm-buzzer init error : 0 0> pwm-buzzer enable 0> pwm-buzzer duty set 0> buzzer timer stop : 0 0> timer handler 0> buzzer stop 0> buzzer timer start : 0 0> pwm-buzzer uninit error : 0 0> pwm-buzzer init error : 0 0> pwm-buzzer enable 0> pwm-buzzer duty set 0> sleep 0> sleep *

RE: watchdog reset after PWM

Sigurd — Fri, 14 Jul 2017 11:45:16 GMT

Is this System OFF or System ON sleep ? I assume that you are using GPIOTE for the button? The nRF51 has only 4 GPIOTE channels and the PWM library uses one per PWM channel. So if you run out of GPIOTE channels you will get the NRF_ERROR_NO_MEM error.

RE: watchdog reset after PWM

air — Fri, 14 Jul 2017 02:22:20 GMT

I received an "NRF_ERROR_NO_MEM" error message when calling app_pwm_init (). It occurs mainly when the MCU sleeps for a long time and receives a button input and generates a buzzer sound after the button process. I don't use any PPI except PWM1/2.

RE: watchdog reset after PWM

Sigurd — Thu, 13 Jul 2017 10:47:42 GMT

Ok, but according to the error message, the PWM instance is not initialized. So it’s seems that you are trying to uninitialize the PWM instance, but it’s already uninitialized, and you get the error-code NRF_ERROR_INVALID_STATE.

RE: watchdog reset after PWM

air — Thu, 13 Jul 2017 10:27:08 GMT

I used app_pwm_uninit() to play another sound during playback. I remember that I used to do that on other MCUs. If I continue to modify / check with a debug message, it seems to be almost happening in makeSound () function. If I'm wrong, I'd like some help on how to fix it.

Thanks.

RE: watchdog reset after PWM

Sigurd — Thu, 13 Jul 2017 09:23:35 GMT

If you take a look at the documentation here, you will get NRF_ERROR_INVALID_STATE returned from app_pwm_uninit(...) if the given instance was not initialized.

Also, why do you do uninitializing when you call makeSound()?

RE: watchdog reset after PWM

air — Thu, 13 Jul 2017 08:22:55 GMT

I saw NRF_ERROR_INVALID_STATE (NRF_ERROR_BASE_NUM + 8) when app_pwm_uninit(&PWM_BUZZER); called. But PWM works.