Public function

Functions
void	buck_cfg_setup (buck_cfg_t *cfg)
	Config Object Initialization function.
BUCK_RETVAL	buck_init (buck_t *ctx, buck_cfg_t *cfg)
	Initialization function.
void	buck_default_cfg (buck_t *ctx)
	Click Default Configuration function.
void	buck_device_reset (buck_t *ctx)
	Device reset chip function.
void	buck_set_mode (buck_t *ctx, uint8_t mode)
	Select buck mode (Disable / Enable)
uint8_t	buck_get_power_good (buck_t *ctx)
	Get state internal comparator function.
void	buck_set_multiplexer_state (buck_t *ctx, uint8_t mux, uint8_t state)
	Set multiplexer (A0 or A1) state.
void	buck_switch_frequency (buck_t *ctx, uint8_t frequency)
	Setting the switching frequency function.

Detailed Description

Function Documentation

buck_cfg_setup()

void buck_cfg_setup

(

buck_cfg_t *

cfg

)

Config Object Initialization function.

Parameters

cfg	Click configuration structure.

@description This function initializes click configuration structure to init state.

Note

All used pins will be set to unconnected state.

buck_default_cfg()

void buck_default_cfg

(

buck_t *

ctx

)

Click Default Configuration function.

Parameters

ctx	Click object.

@description This function executes default configuration for BUCK click.

Note

Default module configuration:

- Set frequency ( BUCK_FREQ_400KHz )
- Set powermode ( BUCK_DEVICE_ENABLE )

buck_device_reset()

void buck_device_reset

(

buck_t *

ctx

)

Device reset chip function.

Parameters

ctx	Click object.

Note

Function soft reset LT3976 chip by set state of CS pin from low to high.

buck_get_power_good()

uint8_t buck_get_power_good

(

buck_t *

ctx

)

Get state internal comparator function.

Parameters

ctx	Click object.

Returns

- 1 : power good output voltage;
- 0 : not a good input voltage, set the input voltage to a minimum of 4500mV;

Note

Function get state internal comparator by read state of INT pin on Buck Click.

buck_init()

BUCK_RETVAL buck_init	(	buck_t *	ctx,
		buck_cfg_t *	cfg )

Initialization function.

Parameters

buck	Click object.
cfg	Click configuration structure.

@description This function initializes all necessary pins and peripherals used for this click.

buck_set_mode()

void buck_set_mode	(	buck_t *	ctx,
		uint8_t	mode )

Select buck mode (Disable / Enable)

Parameters

ctx	Click object.
mode	Buck mode (Enable / Disable)

buck_set_multiplexer_state()

void buck_set_multiplexer_state	(	buck_t *	ctx,
		uint8_t	mux,
		uint8_t	state )

Set multiplexer (A0 or A1) state.

Parameters

ctx	Click object.
mode	Buck mode (Enable / Disable)

buck_switch_frequency()

void buck_switch_frequency	(	buck_t *	ctx,
		uint8_t	frequency )

Setting the switching frequency function.

Parameters

frequency

8-bit frequency value: - 0 : frequency 400 kHz, resistor 130k - 1 : frequency 1200 kHz, resistor 32.4k - 2 : frequency 800 kHz, resistor 54.9k - 3 : frequency 1600 kHz, resistor 21.5k

<br>note Function setting the switching frequency to the LT3976 chip on Buck Click.