Button#

HIGH_LEVEL_INTERRUPT#

#define HIGH_LEVEL_INTERRUPT

1U

Interrupt on low/pressed button state can be configured.

Interrupt on high/released button state

LOW_LEVEL_INTERRUPT#

#define LOW_LEVEL_INTERRUPT

2U

Interrupt on low/pressed button state can be configured.

HIGH_LEVEL_AND_LOW_LEVEL_INTERRUPT#

#define HIGH_LEVEL_AND_LOW_LEVEL_INTERRUPT

  3U

Interrupt on low/pressed and high/released button state can be configured.

RISE_EDGE_INTERRUPT#

#define RISE_EDGE_INTERRUPT

4U

Interrupt on rising edge of the button press.

FALL_EDGE_INTERRUPT#

#define FALL_EDGE_INTERRUPT

8U

Interrupt on falling edge of the button press.

RISE_EDGE_AND_FALL_EDGE_INTERRUPT#

#define RISE_EDGE_AND_FALL_EDGE_INTERRUPT

12U

Interrupt on rising edge and falling edge of the button press.

BUTTON_PRESSED#

#define BUTTON_PRESSED

1

Button state is pressed.

BUTTON_RELEASED#

#define BUTTON_RELEASED

0

Button state is released.

BUTTON_STATE_INVALID#

#define BUTTON_STATE_INVALID

-1

Button state is invalid.

sl_si91x_button_init#

void sl_si91x_button_init (const sl_button_t * handle)

Initializes the buttons.

This function is automatically called when a button instance is created.

Returns

• none

sl_si91x_button_state_get#

int8_t sl_si91x_button_state_get (uint8_t pin)

Returns the current state (pressed or released) of a button.

Note

• This function is correlated with sl_si91x_button_isr() and so returns the shadow state rather than reading the actual state of the pin.

Returns

• BUTTON_PRESSED if the button is pressed or BUTTON_RELEASED if the button is not pressed.

sl_si91x_button_pin_state#

int8_t sl_si91x_button_pin_state (uint8_t pin)

Returns the current state (pressed or released) of the pin associated with a button.

This reads the actual state of the pin and can be used on startup to determine the initial position of the buttons.

Returns

• BUTTON_PRESSED if the button is pressed or BUTTON_RELEASED if the button is not pressed.

sl_si91x_button_pin_isr#

void sl_si91x_button_pin_isr (uint8_t pin, uint8_t state)

A callback called in interrupt context whenever a button changes its state.

Note

• Must be implemented by the application. This function should contain the functionality to be executed in response to changes of state in each of the buttons, or callbacks to the appropriate functionality.

Returns

• none

sl_si91x_button_state_toggle#

void sl_si91x_button_state_toggle (uint8_t pin)

Toggles the value of a local variable associated with the state of button.

Note

• Must be implemented by the application. This function should contain the functionality to be executed in response to changes of state in each of the buttons, or callbacks to the appropriate functionality.

Returns

• none

sl_si91x_button_state_set#

void sl_si91x_button_state_set (uint8_t pin, int8_t state)

Sets the state (pressed or released) of the pin associated with a button.

Note

• Must be implemented by the application. This function should contain the functionality to be executed in response to changes of state in each of the buttons, or callbacks to the appropriate functionality.

Returns

• none

sl_si91x_button_isr#

void sl_si91x_button_isr (uint8_t pin, int8_t state)

A callback that user can modify for the application.

Note

• Must be implemented by the application. This function should contain the functionality to be executed in response to changes of state in each of the buttons, or callbacks to the appropriate functionality.

Returns

• none