Grove ledbar

Driver for the Grove ledbar. More...

Detailed Description

Driver for the Grove ledbar.

This driver provides [S]ensor [A]ctuator [U]ber [L]ayer capabilities.

Files
file	grove_ledbar_params.h
	Config for the Grove LED bar based on MY9221 LED controller.
file	grove_ledbar.h
	Interface for the Grove ledbar driver.

Macros
#define	GROVE_LEDBAR_MAX   UINT8_MAX
	Maximum value for ledbar level.

Typedefs
typedef my9221_params_t	grove_ledbar_params_t
	Parameters needed for device initialization.
typedef my9221_t	grove_ledbar_t
	Device descriptor for grove ledbar, alias for MY9221 LED controller.

Functions
int	grove_ledbar_init (grove_ledbar_t *dev, const grove_ledbar_params_t *params)
	Initialize the given driver. More...
void	grove_ledbar_set (grove_ledbar_t *dev, uint8_t level)
	Set overall (brightness) level distributed over all LEDs. More...
void	grove_ledbar_clear (grove_ledbar_t *dev)
	Clear ledbar, i.e. More...

Ledbar direction, either red to green, or vice versa.
#define	GROVE_LEDBAR_R2G   MY9221_DIR_FWD
#define	GROVE_LEDBAR_G2R   MY9221_DIR_REV

Function Documentation

grove_ledbar_clear()

void grove_ledbar_clear

(

grove_ledbar_t *

dev

)

Clear ledbar, i.e.

set all LEDs off

Precondition

dev != NULL

Parameters

[in]

dev

device descriptor grove ledbar

grove_ledbar_init()

int grove_ledbar_init	(	grove_ledbar_t *	dev,
		const grove_ledbar_params_t *	params
	)

Initialize the given driver.

Precondition

dev != NULL and params != NULL

Parameters

[out]	dev	device descriptor grove ledbar
[in]	params	configuration parameters

Returns

0 on success, otherwise error

grove_ledbar_set()

void grove_ledbar_set	(	grove_ledbar_t *	dev,
		uint8_t	level
	)

Set overall (brightness) level distributed over all LEDs.

Precondition

dev != NULL

Parameters

[in]	dev	device descriptor grove ledbar
[in]	level	overall brightness level