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GPIOTE handler module. More...
Typedefs | |
typedef void(* | app_gpiote_event_handler_t )(uint32_t event_pins_low_to_high, uint32_t event_pins_high_to_low) |
GPIOTE event handler type. | |
Functions | |
uint32_t | app_gpiote_init (uint8_t max_users, void *p_buffer) |
Function for initializing the GPIOTE module. | |
uint32_t | app_gpiote_user_register (app_gpiote_user_id_t *p_user_id, uint32_t pins_low_to_high_mask, uint32_t pins_high_to_low_mask, app_gpiote_event_handler_t event_handler) |
Function for registering a GPIOTE user. | |
uint32_t | app_gpiote_user_enable (app_gpiote_user_id_t user_id) |
Function for informing the GPIOTE module that the specified user wants to use the GPIOTE module. | |
uint32_t | app_gpiote_user_disable (app_gpiote_user_id_t user_id) |
Function for informing the GPIOTE module that the specified user is done using the GPIOTE module. | |
uint32_t | app_gpiote_pins_state_get (app_gpiote_user_id_t user_id, uint32_t *p_pins) |
Function for getting the state of the pins which are registered for the specified user. |
Detailed Description
GPIOTE handler module.
The GPIOTE handler allows several modules ("users") to share the GPIOTE interrupt, each user defining a set of pins able to generate events to the user. When a GPIOTE interrupt occurs, the GPIOTE interrupt handler will call the event handler of each user for which at least one of the pins generated an event.
The GPIOTE users are responsible for configuring all their corresponding pins, except the SENSE field, which should be initialized to GPIO_PIN_CNF_SENSE_Disabled. The SENSE field will be updated by the GPIOTE module when it is enabled or disabled, and also while it is enabled.
The module specifies on which pins events should be generated if the pin(s) goes from low->high or high->low or both directions.
- Note:
- Even if the application is using the Scheduler, the GPIOTE event handlers will be called directly from the GPIOTE interrupt handler.
Typedef Documentation
typedef void(* app_gpiote_event_handler_t)(uint32_t event_pins_low_to_high, uint32_t event_pins_high_to_low) |
GPIOTE event handler type.
Definition at line 62 of file app_gpiote.h.
Function Documentation
uint32_t app_gpiote_init | ( | uint8_t | max_users, |
void * | p_buffer | ||
) |
Function for initializing the GPIOTE module.
- Note:
- Normally initialization should be done using the APP_GPIOTE_INIT() macro, as that will allocate the buffer needed by the GPIOTE module (including aligning the buffer correctly).
- Parameters:
-
[in] max_users Maximum number of GPIOTE users. [in] p_buffer Pointer to memory buffer for internal use in the app_gpiote module. The size of the buffer can be computed using the APP_GPIOTE_BUF_SIZE() macro. The buffer must be aligned to a 4 byte boundary.
- Return values:
-
NRF_SUCCESS Successful initialization. NRF_ERROR_INVALID_PARAM Invalid parameter (buffer not aligned to a 4 byte boundary).
uint32_t app_gpiote_pins_state_get | ( | app_gpiote_user_id_t | user_id, |
uint32_t * | p_pins | ||
) |
Function for getting the state of the pins which are registered for the specified user.
- Parameters:
-
[in] user_id Id of user to check. [out] p_pins Bit mask corresponding to the pins configured to generate events to the specified user. All bits corresponding to pins in the state 'high' will have value '1', all others will have value '0'.
- Returns:
- NRF_SUCCESS On success.
- Return values:
-
NRF_ERROR_INVALID_PARAM Invalid user_id provided, No a valid user. NRF_ERROR_INALID_STATE If app_gpiote_init has not been called on the GPIOTE module.
uint32_t app_gpiote_user_disable | ( | app_gpiote_user_id_t | user_id ) |
Function for informing the GPIOTE module that the specified user is done using the GPIOTE module.
- Parameters:
-
[in] user_id Id of user to enable.
- Returns:
- NRF_SUCCESS On success.
- Return values:
-
NRF_ERROR_INVALID_PARAM Invalid user_id provided, No a valid user. NRF_ERROR_INALID_STATE If app_gpiote_init has not been called on the GPIOTE module.
uint32_t app_gpiote_user_enable | ( | app_gpiote_user_id_t | user_id ) |
Function for informing the GPIOTE module that the specified user wants to use the GPIOTE module.
- Parameters:
-
[in] user_id Id of user to enable.
- Return values:
-
NRF_SUCCESS On success. NRF_ERROR_INVALID_PARAM Invalid user_id provided, No a valid user. NRF_ERROR_INALID_STATE If app_gpiote_init has not been called on the GPIOTE module.
uint32_t app_gpiote_user_register | ( | app_gpiote_user_id_t * | p_user_id, |
uint32_t | pins_low_to_high_mask, | ||
uint32_t | pins_high_to_low_mask, | ||
app_gpiote_event_handler_t | event_handler | ||
) |
Function for registering a GPIOTE user.
- Parameters:
-
[out] p_user_id Id for the new GPIOTE user. [in] pins_low_to_high_mask Mask defining which pins will generate events to this user when state is changed from low->high. [in] pins_high_to_low_mask Mask defining which pins will generate events to this user when state is changed from high->low. [in] event_handler Pointer to function to be executed when an event occurs.
- Return values:
-
NRF_SUCCESS Successful initialization. NRF_ERROR_INVALID_PARAM Invalid parameter (buffer not aligned to a 4 byte boundary). NRF_ERROR_INALID_STATE If app_gpiote_init has not been called on the GPIOTE module. NRF_ERROR_NO_MEM Returned if the application tries to register more users than defined when the GPIOTE module was initialized in app_gpiote_init.
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