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7.12.5 GPIO Notify settings
The GPIO API can be configured to generate notifications in the form of URC messages upon GPIO input events.
The available events are:
#define GPIO_NOTIFY_ISR_TRIGGERED 0x00000001
#define GPIO_NOTIFY_PROPERTY_TRIGGERED 0x00000002
#define GPIO_NOTIFY_HARDWARE_ERROR_DETECT 0x00000004
Use the following command to turn on the desired URC notifications:
AT+GPIONSF =<gpioNotifyFlags>
Where <gpioNotifyFlags> is a bitmask of the above values.
The active flags can be queried via:
AT+GPIONSF?
The notification enumeration is as follows:
typedef enum
{
GPIO_EVENT_TYPE_INVALID = 0,
GPIO_EVENT_ISR_TRIGGERED,
GPIO_EVENT_PROPERTY_TRIGGERED,
GPIO_EVENT_HARDWARE_ERROR_DETECTED,
} gpio_event_types_enum;
The URC notifications will come back in the standard URC format, e. g:
“+URC: “GPIO”,<MessageSource_t><GPIOEventType>,eventspecificparams”
The most common event to be reported with be the ISR event, which put simply, means that the state of that
input. The format of the ISR event URC is:
+URC: “GPIO”,<MessageSource_t>,<GPIOEventType>,<key>,<pin>,<readState>
In one of the examples above, we reserved the pin who’s key is “0”, and the Nordic pin number is “2”. When
this pin transitions from low to high, the URC generated will be:
+URC: “GPIO”,17,1,0,2,1
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