About the priority of multiple interrupts

[takashina hiroki]

SDK: 15.3.0
Device: EYSHJNZWZ (nRF52832)

I am using multiple interrupts.
For example, BLE communication interrupt and SOC interrupt.
I set the priority of each interrupt as follows.

#define		C_APP_SOC_OBSERVER_PRIO			1
#define		C_BLE_APP_BLE_OBSERVER_PRIO		3

NRF_SDH_SOC_OBSERVER(
						m_soc_observer,
						C_APP_SOC_OBSERVER_PRIO,
						e_soc_evt_handler,
						NULL
);

NRF_SDH_BLE_OBSERVER(
						m_ble_observer,
						C_BLE_APP_BLE_OBSERVER_PRIO,
						e_ble_evt_handler,
						NULL
);

Since the priority of the interrupt is different, I think that it will be a multiple interrupt.
When a high-priority interrupt occurs during a low-priority interrupt, the high-priority interrupt runs with priority.
Is my opinion correct?
Is it possible to disable or enable multiple interrupts?

[Håkon Alseth]

Hi,

 

 

I am using multiple interrupts.
For example, BLE communication interrupt and SOC interrupt.

 The _OBSERVER macro will inherit the interrupt priority of the interrupt vector that is set pending by the SoftDevice (SWI2 by default) in nrf_sdh.c::SD_EVT_IRQHandler.

Each registered observer has a priority level in the case that several observers are registered to the same type, and one shall execute first (ie: a software implemented priority).

 

Since the priority of the interrupt is different, I think that it will be a multiple interrupt.
When a high-priority interrupt occurs during a low-priority interrupt, the high-priority interrupt runs with priority.
Is my opinion correct?
Is it possible to disable or enable multiple interrupts?

 As mentioned, these observers will inherit the interrupt level as the SD_EVT_IRQ runs in.

You can disable interrupts if you'd like, but as you should not disable softdevice interrupts, you should use these macros instead which only disables application interrupts:

CRITICAL_REGION_ENTER();

critical_code();

CRITICAL_REGION_EXIT();

Kind regards,

Håkon

[takashina hiroki]

Thank you for answering.
I understood interrupt priority and how to disable interrupts.

>> Since the priority of the interrupt is different, I think that it will be a multiple interrupt.
>> When a high-priority interrupt occurs during a low-priority interrupt, the high-priority interrupt runs with priority.
>> Is my opinion correct?
What about the above?
Please tell me.