Low Power PWM Breathing LED

[Caleb Dueck]

I would like to use the low power pwm library to get a breathing LED effect on my device. The MCU I am using is a BMD 350 and the LED is connected to nRF52 port P0.02.

I have read through the low power pwm example but am confused as to how I should configure it. Specifically what bit_mask I would need to specify P0.02 as the pwm pin.

I have copied the low power pwm example program and have specified the pin as the bitmask however the LED is not blinking.

low_power_pwm_config.bit_mask = BLUE_LED_PIN;
low_power_pwm_config.p_timer_id = &lpp_timer_0;
low_power_pwm_config.p_port = NRF_GPIO;

Any help would be appreciated.

[Elfving]

Hello Celab,

Have you tried the led_softblink example as well, or just low power PWM example and the library? Does the example do what you need it to?

Btw, I would suggest switching to the nRF Connect SDK if this is a new project you are starting. 

Regards,

Elfving

[Caleb Dueck]

I am trying this. However, I am still confused by the leds_pin_bit_mask. Do I need to do anything special or can I simply input the GPIO pin number?

[Elfving]

I wouldn't say you need anything special, but you need to input a bit mask - not a GPIO pin number. 

You could input the GPIO pin number in the board file though (eg. pca10040.h). Simply edit LED_1=2;

Regards,

Elfving

[Caleb Dueck]

Thank you for the help I found that I had to use the PIN_MASK(BSP_LED_1) macro and I could then OR these together
```(PIN_MASK(BSP_LED_1) | PIN_MASK(BSP_LED_2))```

[Elfving]

Great! I'm glad you found something that works for you.

Regards,

Elfving