GPIOTE interrupt count

RE: GPIOTE interrupt count

Petter Myhre — Mon, 20 Feb 2017 11:58:51 GMT

What do you mean by you are not able to discover your device? You are not able to scan it with a central device? Was it working with the unmodifed ble_app_template? Have you tried to used the debugger to see what is happening? I also recommend checking returned the error codes with APP_ERROR_CHECK(err_code) to see if the operations are actually accepted.

RE: GPIOTE interrupt count

karthik — Sun, 19 Feb 2017 05:45:04 GMT

Hi Roger Clark. Thank you so much. Since I am new to BLE I would like to ask you some help for my project. I am trying to capture the changes in PIN28 and transfer the count(number of changes) to another nRF51822, with which I communicate with my android phone. I've identified the softdevices to be used from this link link text

I would be happy if you could help me with program flow (if possible some important code snippets since i have my project deadline on 1st march)

Thanks a lot in advance.

RE: GPIOTE interrupt count

Roger Clark — Sun, 19 Feb 2017 00:35:43 GMT

If you want to check more quickly, you may want to use

NRF_GPIO->IN

which returns the whole of the GPIO at the same time and you just need to mask the bit you are testing for

Calling nrf_drv_gpiote_in_is_set is OK, but will take longer to run (which is especially important in an ISR)

RE: GPIOTE interrupt count

karthik — Sat, 18 Feb 2017 05:13:06 GMT

Thank u Johannes. I ll try this out :)

RE: GPIOTE interrupt count

Johannes Lorenz — Sat, 18 Feb 2017 04:25:30 GMT

Hi, on my nRF51822 I use this configuration:

nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false); 
in_config.pull = NRF_GPIO_PIN_NOPULL;
in_config. sense = NRF_GPIO_PIN_SENSE_LOW;

Then in gpiote_event_handler I catch the action NRF_GPIOTE_POLARITY_TOGGLE and check with nrf_drv_gpiote_in_is_set(pin) whether we have a low to high or high to low pin event.

if (action == NRF_GPIOTE_POLARITY_TOGGLE) {
		if (!nrf_drv_gpiote_in_is_set(pin)) {
			// high to low pin event
		} else {
			// low to high pin event
		}

}

I avoid using GPIOTE_CONFIG_IN_SENSE_LOTOHI(true) . Because of a bug in this NRF51822 revision, individual pin interrupts (true) uses HF and 1mA current!

HTH Johannes