how to set the GPIO as input and high LOW pin?

[dewal]

I am using nrf52832 ble, I want to set the pin P0.2 low as analog input and p0.3 high as analog input .

#define AIN0 2        // analog pin p0.2

#define AIN1 3

#define AIN0_PIN_CONFIG_HIGH ((GPIO_PIN_CNF_SENSE_High << GPIO_PIN_CNF_SENSE_Pos)     | \
                           (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)    | \
                           (NRF_GPIO_PIN_PULLDOWN << GPIO_PIN_CNF_PULL_Pos)                 | \
                           (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | \
                           (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos))
#define AIN1_PIN_CONFIG_LOW ((GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos)     | \
                           (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)    | \
                           (NRF_GPIO_PIN_PULLDOWN << GPIO_PIN_CNF_PULL_Pos)                 | \
                           (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | \
                           (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos))

is this correct?

[awneil]

dewal said:

set the pin P0.2 low as analog input and p0.3 high as analog input

What do you mean by that?

Do you want an analogue input with pull-up/down?

Or what?

Please explain further.

[dewal]

i want to set that pin as gpio (analog inuput ) low signal and high sense signal.

[awneil]

Sorry - still no idea what you mean by that.

[Sigurd]

If you are using nRF5 SDK, then take look at the pin_change_int example.

For low-to-high sense, use GPIOTE_CONFIG_IN_SENSE_LOTOHI

    nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_LOTOHI(true);
    in_config.pull = NRF_GPIO_PIN_PULLDOWN;

    err_code = nrf_drv_gpiote_in_init(PIN_IN, &in_config, in_pin_handler);
    APP_ERROR_CHECK(err_code);