LED

Board LED control. More...

Functions
void	ove_led_set (unsigned int led, int on)
	Turn a board LED on or off.
void	ove_led_toggle (unsigned int led)
	Toggle the current state of a board LED.
unsigned int	ove_led_count (void)
	Return the number of LEDs available on the current board.

Detailed Description

Board LED control.

Simple on/off and toggle control for the LEDs described by the active board descriptor. LED indices are 0-based and must be less than the value returned by ove_led_count().

Note

Requires CONFIG_OVE_LED. When the option is disabled every function is replaced by a no-op stub.

Function Documentation

ove_led_set()

void ove_led_set	(	unsigned int	led,
		int	on
	)

Turn a board LED on or off.

Active-low polarity is handled transparently by the backend; callers always pass a logical level.

Parameters

[in]	led	Zero-based LED index (must be < ove_led_count()).
[in]	on	Non-zero to turn the LED on, zero to turn it off.

ove_led_toggle()

void ove_led_toggle

(

unsigned int

led

)

Toggle the current state of a board LED.

Parameters

[in]

led

Zero-based LED index (must be < ove_led_count()).

ove_led_count()

unsigned int ove_led_count

(

void

)

Return the number of LEDs available on the current board.

Returns

Number of LEDs, or 0 if none are defined.