Charging indication by LED glow

RE: Charging indication by LED glow

Rahul — Fri, 09 Mar 2018 11:34:58 GMT

yes, with pull down it is working fine thank you so much

RE: Charging indication by LED glow

Rahul — Fri, 09 Mar 2018 11:10:49 GMT

ok i will try sir

thank you

RE: Charging indication by LED glow

Martin — Fri, 09 Mar 2018 11:07:39 GMT

try to set NRF_GPIO_PIN_PULLDOWN instead of UP.
I reworked my code to give an example, how to do it without loop, so there is no guaranty it works for you out of the box. ;-)

Cheers

RE: Charging indication by LED glow

Rahul — Fri, 09 Mar 2018 10:41:23 GMT

thanks for reply. i tried this when i plug in USB, LED is glowing but after removing USB , LED is ON only.

RE: Charging indication by LED glow

Martin — Fri, 09 Mar 2018 09:21:19 GMT

waht you are trying to do is

you need to define pin 17 as input and detect the state with e.g. nrf_gpio_pin_read.

I would suggest to watch for the state change and not read, cfg and set in a loop.

I implemented it like this:

void init_power_detect(){
	nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false);
	in_config.pull = NRF_GPIO_PIN_PULLUP;

	err_code = nrf_drv_gpiote_in_init(DEV_PIN_CHARGE, &in_config, pin_handler_charge);
	if(nrf_gpio_pin_read(DEV_PIN_CHARGE)){
		NRF_LOG_DEBUG("CHARGE ON > SENSE POWER OFF\r\n");
		nrf_gpio_cfg_sense_input(DEV_PIN_CHARGE, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);
		nrf_gpio_pin_set(LED_CHARGE);
	} else {
		NRF_LOG_DEBUG("CHARGE OFF > SENSE POWER ON\r\n");
		nrf_gpio_cfg_sense_input(DEV_PIN_CHARGE, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_HIGH);
		nrf_gpio_pin_clear(LED_CHARGE);
	}
}

void pin_handler_charge(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action){
	if(pin == DEV_PIN_CHARGE)
	{
		switch(action){
		case NRF_GPIOTE_POLARITY_TOGGLE:
			if(nrf_gpio_pin_read(DEV_PIN_CHARGE)){
			    // 1 = Charging
				nrf_gpio_pin_set(LED_CHARGE);
			} else {
			    // 0 = NOT Charging
				nrf_gpio_pin_clear(LED_CHARGE);
			}
			break;
		}
	}
}

Cheers