Need help with nRF5340 IRQ conflict errors when adding GPIOTE drivers to Nordic Bluetooth Peripheral UART project

Question

We are using the Nordic Bluetooth "Peripheral UART" project as a base for our project and I am attempting to add the GPIOTE drivers to the project but getting the following error: 
 gen_isr_tables.py: error: multiple registrations at table_index 47 for irq 47 (0x2f)
Existing handler 0x39aa5, new handler 0x39aa5
Has IRQ_CONNECT or IRQ_DIRECT_CONNECT accidentally been invoked on the same irq multiple times? 
 It looks like there is an IRQ conflict with adding the GPIOTE drivers and the DK drivers. 
 The reason I need the GPIOTE driver is in order to add multiple QDEC rotary encoders (which is not supported by the current QDEC driver). I have attached a sample app that demonstrates the error. We are using NCS v2.3.0 targeting nrf5340dk_nrf5340_cpuapp_ns. We need to deconflict the IRQ but also keep the as much of the DK drivers as possible to expedite this project. 
 See attached application below: peripheral_uart_GPIOTE.zip 
 Thanks for the help!

Hieu · Accepted Answer

Hi, 
 GPIOTE is limited, but, on the nRF5340, the limit is eight event or task total. So, you should be able to get four triggers. 
 I just tested the following code. In writing it, I realize that maybe you are reusing GPIOTE channel for all inputs? Here is my code, tested to be working with nRF DK buttons. 
 #define PRINTK_CASE(_CASE) case _CASE: printk(#_CASE); break

void gpiote_interrupt_handler_230504(nrfx_gpiote_pin_t pin,
 nrfx_gpiote_trigger_t trigger,
 void * p_context)
{
	printk("gpiote_interrupt_handler_230504 Pin %d ", pin);
	switch (trigger)
	{
 PRINTK_CASE(NRFX_GPIOTE_TRIGGER_NONE);
 PRINTK_CASE(NRFX_GPIOTE_TRIGGER_LOTOHI);
 PRINTK_CASE(NRFX_GPIOTE_TRIGGER_HITOLO);
 PRINTK_CASE(NRFX_GPIOTE_TRIGGER_TOGGLE);
 PRINTK_CASE(NRFX_GPIOTE_TRIGGER_LOW);
 PRINTK_CASE(NRFX_GPIOTE_TRIGGER_HIGH);
 PRINTK_CASE(NRFX_GPIOTE_TRIGGER_MAX);
 default: printk("OH NO");
	}
	printk("
");
}

// Interrupt enabled on 
void config_input_via_nrfx_230504(const uint8_t port, const uint8_t pin)
{
	nrfx_err_t err;

nrfx_gpiote_input_config_t t_input_config = {.pull = NRF_GPIO_PIN_PULLUP};
	
	uint8_t t_gpiote_channel;
	err = nrfx_gpiote_channel_alloc(&t_gpiote_channel);
	printk("nrfx_gpiote_channel_alloc ");
	switch (err)
	{
 PRINTK_CASE(NRFX_SUCCESS);
 PRINTK_CASE(NRFX_ERROR_INTERNAL);
 PRINTK_CASE(NRFX_ERROR_NO_MEM);
 PRINTK_CASE(NRFX_ERROR_NOT_SUPPORTED);
 PRINTK_CASE(NRFX_ERROR_INVALID_PARAM);
 PRINTK_CASE(NRFX_ERROR_INVALID_STATE);
 PRINTK_CASE(NRFX_ERROR_INVALID_LENGTH);
 PRINTK_CASE(NRFX_ERROR_TIMEOUT);
 PRINTK_CASE(NRFX_ERROR_FORBIDDEN);
 PRINTK_CASE(NRFX_ERROR_NULL);
 PRINTK_CASE(NRFX_ERROR_INVALID_ADDR);
 PRINTK_CASE(NRFX_ERROR_BUSY);
 PRINTK_CASE(NRFX_ERROR_ALREADY_INITIALIZED);
 PRINTK_CASE(NRFX_ERROR_DRV_TWI_ERR_OVERRUN);
 PRINTK_CASE(NRFX_ERROR_DRV_TWI_ERR_ANACK);
 PRINTK_CASE(NRFX_ERROR_DRV_TWI_ERR_DNACK);
 default: printk("OH NO");
	}
	printk("
");

nrfx_gpiote_trigger_config_t t_trigger_config = {
 .trigger = NRFX_GPIOTE_TRIGGER_TOGGLE, 
 .p_in_channel = &t_gpiote_channel
	};

nrfx_gpiote_handler_config_t t_handle_config = {
 .handler = &gpiote_interrupt_handler_230504,
 .p_context = NULL
	};
	
	err = nrfx_gpiote_input_configure(pin, &t_input_config, &t_trigger_config, &t_handle_config);
	printk("nrfx_gpiote_input_configure ");
	switch (err)
	{
 PRINTK_CASE(NRFX_SUCCESS);
 PRINTK_CASE(NRFX_ERROR_INTERNAL);
 PRINTK_CASE(NRFX_ERROR_NO_MEM);
 PRINTK_CASE(NRFX_ERROR_NOT_SUPPORTED);
 PRINTK_CASE(NRFX_ERROR_INVALID_PARAM);
 PRINTK_CASE(NRFX_ERROR_INVALID_STATE);
 PRINTK_CASE(NRFX_ERROR_INVALID_LENGTH);
 PRINTK_CASE(NRFX_ERROR_TIMEOUT);
 PRINTK_CASE(NRFX_ERROR_FORBIDDEN);
 PRINTK_CASE(NRFX_ERROR_NULL);
 PRINTK_CASE(NRFX_ERROR_INVALID_ADDR);
 PRINTK_CASE(NRFX_ERROR_BUSY);
 PRINTK_CASE(NRFX_ERROR_ALREADY_INITIALIZED);
 PRINTK_CASE(NRFX_ERROR_DRV_TWI_ERR_OVERRUN);
 PRINTK_CASE(NRFX_ERROR_DRV_TWI_ERR_ANACK);
 PRINTK_CASE(NRFX_ERROR_DRV_TWI_ERR_DNACK);
 default: printk("OH NO");
	}
	printk("
");

nrfx_gpiote_trigger_enable(pin, true);
} 
 Regards, 
 Hieu

Need help with nRF5340 IRQ conflict errors when adding GPIOTE drivers to Nordic Bluetooth Peripheral UART project

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