Device driver for the NXP PCA9633. More...

Detailed Description

Device driver for the NXP PCA9633.

Author: Hendrik van Essen hendr.nosp@m.ik.v.nosp@m.e@fu-.nosp@m.berl.nosp@m.in.de

Files
file	pca9633.h

file	pca9633_regs.h
	Register definitions for the PCA9633 I2C PWM controller.

Data Structures
struct	pca9633_params_t
	PCA9633 device initialization parameters. More...

struct	pca9633_t
	PCA9633 PWM device data structure type. More...

Macros
#define	PCA9633_BLINKING_PERIOD_MAX_MS (10625)
	Blinking period with a maximum duration of ~10.73 s.

#define	PCA9633_BLINKING_RATIO_BALANCED 128
	Ration between on/ off in blinking mode is balanced. More...

Enumerations
enum	{ PCA9633_OK = 0, PCA9633_ERROR_I2C = 1 }
	PCA9633 driver error codes. More...

enum	pca9633_pwm_channel_t { PCA9633_PWM_CHANNEL_0 = PCA9633_REG_PWM0, PCA9633_PWM_CHANNEL_1 = PCA9633_REG_PWM1, PCA9633_PWM_CHANNEL_2 = PCA9633_REG_PWM2, PCA9633_PWM_CHANNEL_3 = PCA9633_REG_PWM3 }
	PCA9633 PWM channel definitions. More...

enum	pca9633_ldr_state_t { PCA9633_LDR_STATE_OFF, PCA9633_LDR_STATE_ON, PCA9633_LDR_STATE_IND, PCA9633_LDR_STATE_IND_GRP }
	LED driver output state, LEDOUT (page 14, below table 13) More...

enum	pca9633_auto_inc_option_t { PCA9633_AI_DISABLED, PCA9633_AI_ALL, PCA9633_AI_IND, PCA9633_AI_GBL, PCA9633_AI_IND_GBL }
	Auto-Increment options (page 10, table 6) More...

enum	pca9633_group_control_mode_t { PCA9633_GROUP_CONTROL_MODE_BLINKING, PCA9633_GROUP_CONTROL_MODE_DIMMING }
	PCA9633 group control modes. More...

Functions
int	pca9633_init (pca9633_t dev, const pca9633_params_t params)
	Initialization. More...

void	pca9633_turn_on (pca9633_t *dev)
	Turn on all LEDs. More...

void	pca9633_turn_off (pca9633_t *dev)
	Turn off all LEDs. More...

void	pca9633_wakeup (pca9633_t *dev)
	Switch to normal mode. More...

void	pca9633_sleep (pca9633_t *dev)
	Switch to low power mode. More...

void	pca9633_set_pwm (pca9633_t *dev, pca9633_pwm_channel_t pwm_channel, uint8_t pwm)
	Set individual PWM signal for a given channel. More...

void	pca9633_set_grp_pwm (pca9633_t *dev, uint8_t pwm)
	Set global PWM signal. More...

void	pca9633_set_blinking (pca9633_t *dev, uint16_t blink_period_ms, uint8_t on_off_ratio)
	Set up values for blinking mode. More...

void	pca9633_set_rgb (pca9633_t *dev, uint8_t r, uint8_t g, uint8_t b)
	Set PWM values for RGB. More...

void	pca9633_set_rgba (pca9633_t *dev, uint8_t r, uint8_t g, uint8_t b, uint8_t w)
	Set PWM values for RGBA. More...

void	pca9633_set_ldr_state (pca9633_t *dev, pca9633_ldr_state_t state, pca9633_pwm_channel_t pwm_channel)
	Set the LED driver output state for a given channel. More...

void	pca9633_set_ldr_state_all (pca9633_t *dev, pca9633_ldr_state_t state)
	Set the LED driver output state for all channels. More...

void	pca9633_set_auto_increment (pca9633_t *dev, pca9633_auto_inc_option_t option)
	Set an option for auto increment. More...

void	pca9633_set_group_control_mode (pca9633_t *dev, pca9633_group_control_mode_t mode)
	Set the group control mode. More...

Macro Definition Documentation

◆ PCA9633_BLINKING_RATIO_BALANCED

#define PCA9633_BLINKING_RATIO_BALANCED 128

Ration between on/ off in blinking mode is balanced.

128 = 255 / 2

Definition at line 43 of file pca9633.h.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

PCA9633 driver error codes.

Enumerator
PCA9633_OK	Success.
PCA9633_ERROR_I2C	I2C communication error.

Definition at line 71 of file pca9633.h.

◆ pca9633_auto_inc_option_t

enum pca9633_auto_inc_option_t

Auto-Increment options (page 10, table 6)

Enumerator
PCA9633_AI_DISABLED	No Auto-Increment.
PCA9633_AI_ALL	Auto-Increment for all registers. D3, D2, D1, D0 roll over to ‘0000’ after the last register (1100) is accessed.
PCA9633_AI_IND	Auto-Increment for individual brightness registers only. D3, D2, D1, D0 roll over to ‘0010’ after the last register (0101) is accessed.
PCA9633_AI_GBL	Auto-Increment for global control registers only. D3, D2, D1, D0 roll over to ‘0110’ after the last register (0111) is accessed.
PCA9633_AI_IND_GBL	Auto-Increment for individual and global control registers only. D3, D2, D1, D0 roll over to ‘0010’ after the last register (0111) is accessed.

Definition at line 119 of file pca9633.h.

◆ pca9633_group_control_mode_t

enum pca9633_group_control_mode_t

PCA9633 group control modes.

Enumerator
PCA9633_GROUP_CONTROL_MODE_BLINKING	Control mode for blinking.
PCA9633_GROUP_CONTROL_MODE_DIMMING	Control mode for dimming.

Definition at line 155 of file pca9633.h.

◆ pca9633_ldr_state_t

enum pca9633_ldr_state_t

LED driver output state, LEDOUT (page 14, below table 13)

Enumerator
PCA9633_LDR_STATE_OFF	LED driver x is off.
PCA9633_LDR_STATE_ON	LED driver x is fully on (individual brightness and group dimming/ blinking not controlled)
PCA9633_LDR_STATE_IND	LED driver x individual brightness can be controlled through its PWMx register.
PCA9633_LDR_STATE_IND_GRP	LED driver x individual brightness and group dimming/ blinking can be controlled through its PWMx register and the GRPPWM registers. If using PCA9633_LDR_STATE_IND_GRP the controller takes the minimum value of PWM* and GRPPWM register

Definition at line 89 of file pca9633.h.

◆ pca9633_pwm_channel_t

enum pca9633_pwm_channel_t

PCA9633 PWM channel definitions.

Enumerator
PCA9633_PWM_CHANNEL_0	PWM channel 0.
PCA9633_PWM_CHANNEL_1	PWM channel 1.
PCA9633_PWM_CHANNEL_2	PWM channel 2.
PCA9633_PWM_CHANNEL_3	PWM channel 3.

Definition at line 79 of file pca9633.h.

Function Documentation

◆ pca9633_init()

int pca9633_init	(	pca9633_t *	dev,
		const pca9633_params_t *	params
	)

Initialization.

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	params	Parameters for device initialization

Returns: PCA9633_OK on success; -PCA9633_ERROR_I2C if acquiring of I2C bus fails; -EIO When slave device doesn't ACK the byte; -ENXIO When no devices respond on the address sent on the bus; -ETIMEDOUT When timeout occurs before device's response; -EINVAL When an invalid argument is given; -EOPNOTSUPP When MCU driver doesn't support the flag operation; -EAGAIN When a lost bus arbitration occurs

◆ pca9633_set_auto_increment()

void pca9633_set_auto_increment	(	pca9633_t *	dev,
		pca9633_auto_inc_option_t	option
	)

Set an option for auto increment.

There are five options:

PCA9633_AI_DISABLED
PCA9633_AI_ALL
PCA9633_AI_IND
PCA9633_AI_GBL
PCA9633_AI_IND_GBL

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	option	One of the possible five options

◆ pca9633_set_blinking()

void pca9633_set_blinking	(	pca9633_t *	dev,
		uint16_t	blink_period_ms,
		uint8_t	on_off_ratio
	)

Set up values for blinking mode.

Blinking mode needs to be activated manually by calling pca9633_set_group_control_mode(GROUP_CONTROL_MODE_BLINKING).

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	blink_period_ms	Period in ms for one blink (turning off and on). Maximum period possible is PCA9633_BLINKING_PERIOD_MAX_MS ≈ 10.73 s. All values above this maximum will we capped to it.
[in]	on_off_ratio	Value between 0 and 255, where e.g. a value of 64 (255/4) means 1/4 of the time the LEDs are on and 3/4 of the time the LEDs are off.

◆ pca9633_set_group_control_mode()

void pca9633_set_group_control_mode	(	pca9633_t *	dev,
		pca9633_group_control_mode_t	mode
	)

Set the group control mode.

There are two modes:

PCA9633_GROUP_CONTROL_MODE_BLINKING
PCA9633_GROUP_CONTROL_MODE_DIMMING

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	mode	One of the two possible modes

◆ pca9633_set_grp_pwm()

void pca9633_set_grp_pwm	(	pca9633_t *	dev,
		uint8_t	pwm
	)

Set global PWM signal.

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	pwm	PWM value

◆ pca9633_set_ldr_state()

void pca9633_set_ldr_state	(	pca9633_t *	dev,
		pca9633_ldr_state_t	state,
		pca9633_pwm_channel_t	pwm_channel
	)

Set the LED driver output state for a given channel.

There are four states:

PCA9633_LDR_STATE_OFF
PCA9633_LDR_STATE_ON
PCA9633_LDR_STATE_IND
PCA9633_LDR_STATE_IND_GRP

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	state	One of the four possible states
[in]	pwm_channel	PWM channel belonging to LDR

◆ pca9633_set_ldr_state_all()

void pca9633_set_ldr_state_all	(	pca9633_t *	dev,
		pca9633_ldr_state_t	state
	)

Set the LED driver output state for all channels.

There are four states:

PCA9633_LDR_STATE_OFF
PCA9633_LDR_STATE_ON
PCA9633_LDR_STATE_IND
PCA9633_LDR_STATE_IND_GRP

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	state	One of the four possible states

◆ pca9633_set_pwm()

void pca9633_set_pwm	(	pca9633_t *	dev,
		pca9633_pwm_channel_t	pwm_channel,
		uint8_t	pwm
	)

Set individual PWM signal for a given channel.

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	pwm_channel	PWM channel
[in]	pwm	PWM value

◆ pca9633_set_rgb()

void pca9633_set_rgb	(	pca9633_t *	dev,
		uint8_t	r,
		uint8_t	g,
		uint8_t	b
	)

Set PWM values for RGB.

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	r	Value for red color channel
[in]	g	Value for green color channel
[in]	b	Value for blue color channel

◆ pca9633_set_rgba()

void pca9633_set_rgba	(	pca9633_t *	dev,
		uint8_t	r,
		uint8_t	g,
		uint8_t	b,
		uint8_t	w
	)

Set PWM values for RGBA.

Parameters

[in]	dev	Device descriptor of the PCA9633
[in]	r	Value for red color channel
[in]	g	Value for green color channel
[in]	b	Value for blue color channel
[in]	w	Value for amber color channel

◆ pca9633_sleep()

void pca9633_sleep ( pca9633_t * dev )

Switch to low power mode.

Parameters

[in] dev Device descriptor of the PCA9633

◆ pca9633_turn_off()

void pca9633_turn_off ( pca9633_t * dev )

Turn off all LEDs.

Saves current settings for pca9633_turn_on(). For power saving, see pca9633_sleep().

WARNING: If you call pca9633_turn_off() twice, without calling pca9633_turn_on() in between, then the restored state will be PCA9633_LDR_STATE_OFF!

Parameters

[in] dev Device descriptor of the PCA9633

◆ pca9633_turn_on()

void pca9633_turn_on ( pca9633_t * dev )

Turn on all LEDs.

Restores settings saved at pca9633_turn_off().

WARNING: If you call pca9633_turn_off() twice, without calling pca9633_turn_on() in between, then the restored state will be PCA9633_LDR_STATE_OFF!

Parameters

[in] dev Device descriptor of the PCA9633

◆ pca9633_wakeup()

void pca9633_wakeup ( pca9633_t * dev )

Switch to normal mode.

Parameters

[in] dev Device descriptor of the PCA9633

Detailed Description

Files

Data Structures

Macros

Enumerations

Functions

Macro Definition Documentation

◆ PCA9633_BLINKING_RATIO_BALANCED

Enumeration Type Documentation

◆ anonymous enum

◆ pca9633_auto_inc_option_t

◆ pca9633_group_control_mode_t

◆ pca9633_ldr_state_t

◆ pca9633_pwm_channel_t

Function Documentation

◆ pca9633_init()

◆ pca9633_set_auto_increment()

◆ pca9633_set_blinking()

◆ pca9633_set_group_control_mode()

◆ pca9633_set_grp_pwm()

◆ pca9633_set_ldr_state()

◆ pca9633_set_ldr_state_all()

◆ pca9633_set_pwm()

◆ pca9633_set_rgb()

◆ pca9633_set_rgba()

◆ pca9633_sleep()

◆ pca9633_turn_off()

◆ pca9633_turn_on()

◆ pca9633_wakeup()