PORT Event vs nrf_drv_gpiote_in_init()

RE: PORT Event vs nrf_drv_gpiote_in_init()

GT — Wed, 18 Sep 2019 07:04:38 GMT

What is the difference between IN EVENT and PORT event?

RE: PORT Event vs nrf_drv_gpiote_in_init()

Sigurd — Thu, 17 Aug 2017 14:34:41 GMT

For high accuracy mode(IN_EVENT) there is a limit of 8 pins on the nRF52. On nRF51 the limit is 4. This limit is set by the number of GPIOTE channels available. For low accuracy mode (PORT event) there is no such limit. You must specify GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS, which is the number of pins used for low power EVENTS_PORT. This define can be found in sdk_config.h

Yes, you need to call nrf_drv_gpiote_init() if you want to use PORT or IN_EVENT. This function is needed for initializing the GPIOTE module.

Yes, you can do that. Also, for buttons you might want to look into the app_button library if you have problem with debounce on the buttons(so a single button press doesn't appear like multiple presses).

RE: PORT Event vs nrf_drv_gpiote_in_init()

max — Thu, 17 Aug 2017 05:51:26 GMT

Yes you right, i changed it

RE: PORT Event vs nrf_drv_gpiote_in_init()

Jeong Hyun Seok — Thu, 17 Aug 2017 03:30:50 GMT

Can I have more questions?

So I can use nrf_drv_gpiote_in_init() for every 31 GPIO pins? or there is limitations for pin numbers. (ex, 8 pin)
if I don't use IN_EVENT, still I need to init GPIOTE with nrf_drv_gpiote_init()?
Can I register (with nrf_drv_gpiote_in_init()) and use all different event handler functions for each GPIO pin? ex) pin 1 Port Event -> key1_event_handler function pin 2 Port Event -> key2_event_handler function

RE: PORT Event vs nrf_drv_gpiote_in_init()

Jeong Hyun Seok — Thu, 17 Aug 2017 03:23:54 GMT

Thank you. but I think you mention false to true, true to false

RE: PORT Event vs nrf_drv_gpiote_in_init()

Sigurd — Wed, 16 Aug 2017 08:34:08 GMT

It's the other way around

RE: PORT Event vs nrf_drv_gpiote_in_init()

Sigurd — Wed, 16 Aug 2017 08:00:39 GMT

Hi,

If you set the flag to true you use IN_EVENT(high accuracy mode), if you set the flag to false you use PORT event (low accuracy mode).

GPIOTE_CONFIG_IN_SENSE_LOTOHI(false) is a PORT event

GPIOTE_CONFIG_IN_SENSE_LOTOHI(true) is an IN_EVENT.

See API Reference here.

RE: PORT Event vs nrf_drv_gpiote_in_init()

max — Wed, 16 Aug 2017 07:28:42 GMT

Hi,

GPIOTE_CONFIG_IN_SENSE_LOTOHI(true) is an IN_EVENT.

GPIOTE_CONFIG_IN_SENSE_LOTOHI(false) is a PORT event