2 GPIOTE interrupt on 2 PIN, but only one work

[Marco Pennacchietti]

Dear Sir,
I need 2 interrupt handle on 2 PIN, I have set 2 GPIOTE event:

#define PIN_INT1_ACC     4      // INPUT      Interrupt INT1 from ACC
#define PIN_INTB_ECG     8      // INPUT      Interrupt INTB from ECG

//set interrupt 1

nrf_drv_gpiote_in_config_t in_config = NRFX_GPIOTE_CONFIG_IN_SENSE_LOTOHI(false);//TOHI(true);//NRFX_GPIOTE_CONFIG_IN_SENSE_HITOLO(true);//GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
in_config.pull = NRF_GPIO_PIN_PULLUP;
err_code = nrf_drv_gpiote_in_init(PIN_INT1_ACC, &in_config, LIS_in_pin_handler);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_event_enable(PIN_INT1_ACC, true);

//set interrupt 2

nrf_drv_gpiote_in_config_t in_config_MAX = NRFX_GPIOTE_CONFIG_IN_SENSE_HITOLO(false);//TOHI(true);//NRFX_GPIOTE_CONFIG_IN_SENSE_HITOLO(true);//GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
err_code = nrf_drv_gpiote_in_init(PIN_INTB_ECG, &in_config_MAX, MAX_in_pin_handler);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_event_enable(PIN_INTB_ECG, true);


void MAX_in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
   gECGSampleReady = true;
   gECGIntCount++;
}

void LIS_in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
   gLISIntCount++;
}


IF I ENABLE ONE OF THIS ABOVE THE HANDLER WORK PROPERLY (interrupt 1 or interrupt 2)

IF I enable both when the LIS_in_pin_handler is served the first time ,  none of the two handler work any more.
With the oscilloscope the signal on both PIN are OK, go up and down on both pins


I have tryed with SD on or off
If have put the gpiote_config_priority level at 0
If have put the gpiote_config_num_of_low_power_event at 2

But seem not work. Have an idea ?

[Kenneth]

The code example in this case should work for you (since you are not using the NFC pins):
https://devzone.nordicsemi.com/f/nordic-q-a/34847/interrupts-on-many-pins-high-to-low/133788

If that doesn't work, it would be helpful to know what SDK and nRF chip you are using.

Also you may want to use the toggle mode, since the API description says: "In low accuracy mode SENSE feature is used. In this case only one active pin can be detected at a time. It can be worked around by setting all of the used low accuracy pins to toggle mode. For more information about SENSE functionality, refer to Product Specification."

Edit: I could also find this example:
https://devzone.nordicsemi.com/f/nordic-q-a/20195/getting-an-interrupt-when-any-of-multiple-gpio-pins-change/78673#78673 

Best regards,
Kenneth

[Marco Pennacchietti]

SDK = 15

nRF52832

SD  6.0.0

I have implemented your example but did not work,

very strange.

Marco

[Kenneth]

Did you try both examples?

Kenneth

[Marco Pennacchietti]

Yes, but with only 3 interrup,

a button on PIN 24

a MAX3003 on PIN 8

and LIS2DE12 on PIN 4

the interrup on PIN 24 work well with only her enabled

the interrup on PIN 4 work well with only her enabled

the interrup on PIN 8 work well with only her enabled

the interrup on PIN 24 and 8 work well together.

the interrup on PIN 24 and 4 work well together.

he interrup on PIN 24 ,4 and 8 do NOT work well together, When the handler on PIN 4 is served

all 3 interrupt not work anymore.

Now I think to change the firmware in order to use the PPI to manage the interrupt.

What do you think ?

Marco

[Kenneth]

I would recommend to look into what prevent the 3 pins to work together. A first step would be to get a logic analyzer to look at the level and timing of the 3 pins when failing. Also try with in_config.hi_accuracy=true; on all pins.

Best regards,
Kenneth

[Marco Pennacchietti]

Ciao Kenneth,

the solution was very simple.

nrf_drv_gpiote_in_config_t in_config_LIS = NRFX_GPIOTE_CONFIG_IN_SENSE_LOTOHI(true);

nrf_drv_gpiote_in_config_t in_config_MAX = NRFX_GPIOTE_CONFIG_IN_SENSE_HITOLO(true);

nrf_drv_gpiote_in_config_t in_config_BUT = NRFX_GPIOTE_CONFIG_IN_SENSE_HITOLO(true);

I need to use "true" (IN EVENT mode) instead "false" (PORT mode) in the nrf_drv_gpiote_in_config_t 

Thanks for your time

Marco