How to use GPIOTE_IRQHandler for multiple interrupt request ?

[Anand Ramashetty]

Hi,

I have an issue in using GPIOTE_IRQHandler.

Let me give an explanation about our implementaiton.

we have nRF controller which is connected to STM32 controller.

Currently the GPIO pin P0.17 on nRF is used as a interrupt pin for NRF for some purpose.

Now i am planning to implement system off mode on nRF side, i am using GPIO P0.20 as nRF interrupt to wake up from the system off mode.

But how i can use GPIO interrupt handler GPIOTE_IRQHandler for the above two interrupt.

Can you please guide me on this and share some examples for the same.

Regards, Anand

[Hung Bui]

@Anand: You can just make another PIN_CNF[] configuration for pin P0.20 and it will be able to do the same thing as P0.17:

NRF_GPIO->PIN_CNF[20] = (GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos)
                                        | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
                                        | (NRF_GPIO_PIN_NOPULL << 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);

You can also have a look at ram_retention example where we use nrf_gpio_cfg_sense_input to configure the wakeup pin, it's pretty much the same.

[Rita]

@all, I have a simular question. I use the API nrf_gpio_cfg_sense_input() to configure two pin as input for SENSE signal. But the two pins have different SENSE level. One is "NRF_GPIO_PIN_SENSE_HIGH" and the other is "NRF_GPIO_PIN_SENSE_LOW". How can I confugure like this? Thanks a lot.

[Hung Bui]

@Rita: Please create another question don't piggybacking a question here.

I don't see any reason why you can't configure 2 pins with different sense level. You just have to call the nrf_gpio_cfg_sense_input() 2 times, one for each pin.