please why nrf52832 gpio does not produce Interrupt

[qianxuping]

Here is my program：

#define EXIT_PIN       31

void EXIT_Init(void)
{

nrf_gpio_cfg_input(EXIT_PIN,GPIO_PIN_CNF_PULL_Pullup);

NVIC_EnableIRQ(GPIOTE_IRQn);

NRF_GPIOTE->CONFIG[0] = (GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos)
| (EXIT_PIN << GPIOTE_CONFIG_PSEL_Pos)
| (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos);

NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN0_Set << GPIOTE_INTENSET_IN0_Pos;// ʹÄÜÖжÏÀàÐÍ:
}

void GPIOTE_IRQHandler(void)
{

    if ((NRF_GPIOTE->EVENTS_IN[0] == 1) && (NRF_GPIOTE->INTENSET & GPIOTE_INTENSET_IN0_Msk))
    {
         NRF_GPIOTE->EVENTS_IN[0] = 0;

    }

}

but  Program cannot enter interrupt，i Looking at it with an oscilloscope, there is no low level。but i use Query ，i Looking at it with an oscilloscope, there is have low level. it works ok.

EXIT_PIN   is the pin which if data is ok ，Another device Pulls EXIT_PIN's level down.

Thanks very much.

[Kenneth]

Can you try to base your code using the gpiote driver?
\nRF5_SDK\examples\peripheral\pin_change_int

For low power use:

nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false); // use false for low power.

If you want several pins to interrupt you need to increment GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS in sdk_config.h

Best regards,
Kenneth

[qianxuping]

Thank you very much:

     i find out why,  the function buttons_leds_init(&erase_bonds) which has a pin which same as EXIT_PIN ,i don't use this function ,Program can enter interrupt.

now,i have a problem，My interrupt configuration，

NRF_GPIOTE->CONFIG[0] =  (GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos)

                                           | (EXIT_PIN << GPIOTE_CONFIG_PSEL_Pos) 

                                         | (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos);

that Equivalent to  NRF_GPIOTE->CONFIG[0] =0x00031f01，if i use the pa_assist(PA_TXEN, PA_RXEN_NONE);

this function changed my interrupt configuration to NRF_GPIOTE->CONFIG[0] =0x0;when pa_assist(PA_TXEN, PA_RXEN_NONE) wroks  NRF_GPIOTE->CONFIG[0] =0x31103, I just according 0x31103 find what it relation the pa_assist，so i don't use pa_assist(PA_TXEN, PA_RXEN_NONE), it works ok.

      so if i use pa_assist,my interrupt configuration is Invalid，you know why?

the below is my function,  PA_TXEN  is 17, EXIT_PIN   is 31

void pa_assist(uint32_t gpio_pa_pin, uint32_t gpio_lna_pin)
{
ret_code_t err_code;
static const uint32_t gpio_toggle_ch = 0;
static const uint32_t ppi_set_ch = 0;
static const uint32_t ppi_clr_ch = 1;
// Configure SoftDevice PA assist
ble_opt_t opt;
memset(&opt, 0, sizeof(ble_opt_t));
// Common PA config
opt.common_opt.pa_lna.gpiote_ch_id = gpio_toggle_ch; // GPIOTE channel
opt.common_opt.pa_lna.ppi_ch_id_clr = ppi_set_ch; // PPI channel for pin clearing
opt.common_opt.pa_lna.ppi_ch_id_set = ppi_clr_ch; // PPI channel for pin setting
// PA config
opt.common_opt.pa_lna.pa_cfg.active_high = 1; // Set the pin to be active high
opt.common_opt.pa_lna.pa_cfg.enable = 1; // Enable toggling
opt.common_opt.pa_lna.pa_cfg.gpio_pin = gpio_pa_pin; // The GPIO pin to toggle

// opt.common_opt.pa_lna.lna_cfg.active_high = 1;
// opt.common_opt.pa_lna.lna_cfg.enable = 1;
// opt.common_opt.pa_lna.lna_cfg.gpio_pin = gpio_lna_pin;
err_code = sd_ble_opt_set(BLE_COMMON_OPT_PA_LNA, &opt);
APP_ERROR_CHECK(err_code);
}

my english is not good.

Thank you very much