#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include "no_os_util.h"
#include "no_os_alloc.h"
#include "no_os_i2c.h"
#include "no_os_units.h"
#include "ltc2992.h"

Include dependency graph for ltc2992.c:

Functions
int	ltc2992_addr_gen (struct ltc2992_init_param *init_param, enum ltc2992_adr_state a0, enum ltc2992_adr_state a1)
	Generate device I2C address based on ADR pin states.

int	ltc2992_init (struct ltc2992_dev *device, struct ltc2992_init_param init_param)
	Initialize communication peripheral for the device.

int	ltc2992_remove (struct ltc2992_dev *dev)
	Free resources allocated to the device.

int	ltc2992_read_reg (struct ltc2992_dev dev, uint8_t addr, uint32_t data, uint8_t num_bytes)
	Read raw data from device register.

int	ltc2992_write_reg (struct ltc2992_dev *dev, uint8_t addr, uint32_t value, uint8_t num_bytes)
	Write raw data to device register.

int	ltc2992_update_reg (struct ltc2992_dev *dev, uint8_t addr, uint8_t mask, uint8_t val)
	Update register value in the device.

int	ltc2992_get_voltage (struct ltc2992_dev dev, enum ltc2992_sense sense, uint32_t voltage_data)
	Read bus voltage in a sense channel.

int	ltc2992_get_vshunt (struct ltc2992_dev dev, enum ltc2992_sense sense, uint32_t vshunt_data)
	Read shunt voltage in a sense channel.

int	ltc2992_get_current (struct ltc2992_dev dev, enum ltc2992_sense sense, uint32_t current_data)
	Read bus current along a sense channel.

int	ltc2992_get_power (struct ltc2992_dev dev, enum ltc2992_sense sense, uint32_t power_data)
	Read bus power output in a sense channel.

int	ltc2992_get_sum (struct ltc2992_dev dev, enum ltc2992_channel chan, uint32_t sum_data)
	Read the shunt voltage sum or power sum of both sense channels.

int	ltc2992_get_sense_data (struct ltc2992_dev dev, enum ltc2992_sense sense, enum ltc2992_channel chan, uint32_t data)
	Read sense data at a SENSE channel.

int	ltc2992_get_max_data (struct ltc2992_dev dev, enum ltc2992_sense sense, enum ltc2992_channel chan, uint32_t data)
	Read maximum sense data at a SENSE channel.

int	ltc2992_get_min_data (struct ltc2992_dev dev, enum ltc2992_sense sense, enum ltc2992_channel chan, uint32_t data)
	Read minimum sense data at a SENSE channel.

int	ltc2992_set_max_thresh (struct ltc2992_dev *dev, enum ltc2992_sense sense, enum ltc2992_channel chan, uint32_t thresh_value)
	Set upper thresh level for alert at a SENSE channel.

int	ltc2992_set_min_thresh (struct ltc2992_dev *dev, enum ltc2992_sense sense, enum ltc2992_channel chan, uint32_t thresh_value)
	Set lower thresh level for alert at a SENSE channel.

int	ltc2992_set_alert (struct ltc2992_dev *dev, enum ltc2992_sense sense, enum ltc2992_channel chan, enum ltc2992_alert_value alert)
	Enable alert.

int	ltc2992_get_fault (struct ltc2992_dev dev, enum ltc2992_sense sense, enum ltc2992_channel chan, enum ltc2992_fault_status fault)
	Get fault status.

int	ltc2992_clear_fault (struct ltc2992_dev *dev, enum ltc2992_sense sense, enum ltc2992_channel chan)
	Clear fault status.

int	ltc2992_get_gpio_data (struct ltc2992_dev dev, enum ltc2992_gpio gpio, uint32_t gpio_data)
	Get data from a GPIO data converter.

int	ltc2992_get_gpio_max_data (struct ltc2992_dev dev, enum ltc2992_gpio gpio, uint32_t gpio_data)
	Get maximum data from a GPIO data converter.

int	ltc2992_get_gpio_min_data (struct ltc2992_dev dev, enum ltc2992_gpio gpio, uint32_t gpio_data)
	Get minimum data from a GPIO data converter.

int	ltc2992_set_gpio_max_thresh (struct ltc2992_dev *dev, enum ltc2992_gpio gpio, uint32_t thresh_value)
	Set upper threshold level in a GPIO.

int	ltc2992_set_gpio_min_thresh (struct ltc2992_dev *dev, enum ltc2992_gpio gpio, uint32_t thresh_value)
	Set lower threshold level in a GPIO.

int	ltc2992_set_gpio_alert (struct ltc2992_dev *dev, enum ltc2992_gpio gpio, enum ltc2992_alert_value alert_value)
	Enable alert when GPIO level reaches beyond threshold limit.

int	ltc2992_get_gpio_fault (struct ltc2992_dev dev, enum ltc2992_gpio gpio, enum ltc2992_fault_status fault)
	Get GPIO fault status.

int	ltc2992_clear_gpio_fault (struct ltc2992_dev *dev, enum ltc2992_gpio gpio)
	Clear GPIO fault status.

int	ltc2992_reset_alert_pin (struct ltc2992_dev *dev)
	Reset alert pin (GPI04) status.

int	ltc2992_get_gpio_state (struct ltc2992_dev dev, enum ltc2992_gpio gpio, uint8_t state)
	Get GPIO state.

int	ltc2992_set_gpio_output (struct ltc2992_dev *dev, enum ltc2992_gpio gpio, enum ltc2992_gpio_output output)
	Set GPIO output.

Function Documentation

◆ ltc2992_addr_gen()

int ltc2992_addr_gen	(	struct ltc2992_init_param *	init_param,
		enum ltc2992_adr_state	a0,
		enum ltc2992_adr_state	a1 )

Generate device I2C address based on ADR pin states.

Parameters

init_param	- Initialization parameter.
a0	- ADR0 state. Example: LTC2992_ADR_HIGH - ADR at high logic level. LTC2992_ADR_LOW - ADR at ground.. LTC2992_ADR_NC - ADR not connected.
a1	- ADR1 state. Example: LTC2992_ADR_HIGH - ADR at high logic level. LTC2992_ADR_LOW - ADR at ground. LTC2992_ADR_NC - ADR not connected.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_clear_fault()

int ltc2992_clear_fault	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		enum ltc2992_channel	chan )

Clear fault status.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 LTC2992_SENSE2
chan	- Measured data channel. Example: LTC2992_VOLTAGE LTC2992_VSHUNT LTC2992_CURRENT LTC2992_POWER LTC2992_ISUM LTC2992_PSUM

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_clear_gpio_fault()

int ltc2992_clear_gpio_fault	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio )

Clear GPIO fault status.

Parameters

dev	- The device structure.
gpio	- GPIO to clear fault. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_current()

int ltc2992_get_current	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		uint32_t *	current_data )

Read bus current along a sense channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 - Read in SENSE1 channel. LTC2992_SENSE2 - Read in SENSE2 channel.
current_data	- Current read in milliamperes.

Returns: 0 in case of success, negative error code otherwise.

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◆ ltc2992_get_fault()

int ltc2992_get_fault	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		enum ltc2992_channel	chan,
		enum ltc2992_fault_status *	fault )

Get fault status.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 LTC2992_SENSE2
chan	- Measured data channel. Example: LTC2992_VOLTAGE LTC2992_VSHUNT LTC2992_CURRENT LTC2992_POWER LTC2992_ISUM LTC2992_PSUM
fault	- Alert value to set. Example: LTC2992_FAULT_NONE - No fault event LTC2992_FAULT_UNDERVALUE - Undervalue fault occurred LTC2992_FAULT_OVERVALUE - Overvalue fault occurred

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_gpio_data()

int ltc2992_get_gpio_data	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		uint32_t *	gpio_data )

Get data from a GPIO data converter.

Parameters

dev	- The device structure.
gpio	- GPIO to get. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
gpio_data	- Data read

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_gpio_fault()

int ltc2992_get_gpio_fault	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		enum ltc2992_fault_status *	fault )

Get GPIO fault status.

Parameters

dev	- The device structure.
gpio	- GPIO to read fault status. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
fault	- Alert value to set. Example: LTC2992_FAULT_NONE - No fault event LTC2992_FAULT_UNDERVALUE - Undervalue fault occurred LTC2992_FAULT_OVERVALUE - Overvalue fault occurred

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_gpio_max_data()

int ltc2992_get_gpio_max_data	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		uint32_t *	gpio_data )

Get maximum data from a GPIO data converter.

Parameters

dev	- The device structure.
gpio	- GPIO to read. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
gpio_data	- Data read

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_gpio_min_data()

int ltc2992_get_gpio_min_data	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		uint32_t *	gpio_data )

Get minimum data from a GPIO data converter.

Parameters

dev	- The device structure.
gpio	- GPIO to get. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
gpio_data	- Data read

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_gpio_state()

int ltc2992_get_gpio_state	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		uint8_t *	state )

Get GPIO state.

Parameters

dev	- The device structure.
gpio	- GPIO to read state. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
state	- GPIO state Example: 0 - GPIO is logic low 1 - GPIO is logic high

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_max_data()

int ltc2992_get_max_data	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		enum ltc2992_channel	chan,
		uint32_t *	data )

Read maximum sense data at a SENSE channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 - Read in SENSE1 channel. LTC2992_SENSE2 - Read in SENSE2 channel.
chan	- Measured data channel. Example: LTC2992_VOLTAGE - Read bus voltage in millivolts. LTC2992_VSHUNT - Read shunt voltage in microvolts. LTC2992_CURRENT - Read current in milliamperes. LTC2992_POWER - Read power in milliwatts. LTC2992_ISUM - Read ISUM in microvolts. LTC2992_PSUM - Read PSUM in milliwatts.
data	- Read max data.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_min_data()

int ltc2992_get_min_data	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		enum ltc2992_channel	chan,
		uint32_t *	data )

Read minimum sense data at a SENSE channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 - Read in SENSE1 channel. LTC2992_SENSE2 - Read in SENSE2 channel.
chan	- Measured data channel. Example: LTC2992_VOLTAGE - Read bus voltage in millivolts. LTC2992_VSHUNT - Read shunt voltage in microvolts. LTC2992_CURRENT - Read current in milliamperes. LTC2992_POWER - Read power in milliwatts. LTC2992_ISUM - Read ISUM in microvolts. LTC2992_PSUM - Read PSUM in milliwatts.
data	- Read min data.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_power()

int ltc2992_get_power	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		uint32_t *	power_data )

Read bus power output in a sense channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 - Read in SENSE1 channel. LTC2992_SENSE2 - Read in SENSE2 channel.
power_data	- Power read in milliwatts.

Returns: 0 in case of success, negative error code otherwise.

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◆ ltc2992_get_sense_data()

int ltc2992_get_sense_data	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		enum ltc2992_channel	chan,
		uint32_t *	data )

Read sense data at a SENSE channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 - Read in SENSE1 channel. LTC2992_SENSE2 - Read in SENSE2 channel.
chan	- Measured data channel. Example: LTC2992_VOLTAGE - Read bus voltage in millivolts. LTC2992_VSHUNT - Read shunt voltage in microvolts. LTC2992_CURRENT - Read current in milliamperes. LTC2992_POWER - Read power in milliwatts. LTC2992_ISUM - Read ISUM in microvolts. LTC2992_PSUM - Read PSUM in milliwatts.
data	- Read data.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_get_sum()

int ltc2992_get_sum	(	struct ltc2992_dev *	dev,
		enum ltc2992_channel	chan,
		uint32_t *	sum_data )

Read the shunt voltage sum or power sum of both sense channels.

Parameters

dev	- The device structure.
chan	- Measured channel. Example: LTC2992_VSHUNT - Read ISUM. LTC2992_POWER - Read PSUM.
sum_data	- Sum read in microvolts or milliwatts.

Returns: 0 in case of success, negative error code otherwise.

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◆ ltc2992_get_voltage()

int ltc2992_get_voltage	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		uint32_t *	voltage_data )

Read bus voltage in a sense channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 - Read in SENSE1 channel. LTC2992_SENSE2 - Read in SENSE2 channel.
voltage_data	- Voltage read in millivolts.

Returns: 0 in case of success, negative error code otherwise.

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◆ ltc2992_get_vshunt()

int ltc2992_get_vshunt	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		uint32_t *	vshunt_data )

Read shunt voltage in a sense channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 - Read in SENSE1 channel. LTC2992_SENSE2 - Read in SENSE2 channel.
vshunt_data	- Voltage read in microvolts.

Returns: 0 in case of success, negative error code otherwise.

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◆ ltc2992_init()

int ltc2992_init	(	struct ltc2992_dev **	device,
		struct ltc2992_init_param *	init_param )

Initialize communication peripheral for the device.

Parameters

device	- The device structure.
init_param	- Initial parameters.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_read_reg()

int ltc2992_read_reg	(	struct ltc2992_dev *	dev,
		uint8_t	addr,
		uint32_t *	data,
		uint8_t	num_bytes )

Read raw data from device register.

Parameters

dev	- The device structure.
addr	- The register address.
data	- Register data pointer.
num_bytes	- Number of bytes to read.

Returns: 0 in case of success, negative error code otherwise.

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◆ ltc2992_remove()

int ltc2992_remove ( struct ltc2992_dev * dev )

Free resources allocated to the device.

Parameters

dev	- The device structure.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_reset_alert_pin()

int ltc2992_reset_alert_pin ( struct ltc2992_dev * dev )

Reset alert pin (GPI04) status.

Parameters

dev	- The device structure.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_set_alert()

int ltc2992_set_alert	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		enum ltc2992_channel	chan,
		enum ltc2992_alert_value	alert )

Enable alert.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 LTC2992_SENSE2
chan	- Measured data channel. Example: LTC2992_VOLTAGE LTC2992_VSHUNT LTC2992_CURRENT LTC2992_POWER LTC2992_ISUM LTC2992_PSUM
alert	- Alert value to set. Example: LTC2992_ALERT_DISABLE_ALL - Disable alert LTC2992_ALERT_ENABLE_UV - Enable undervalue alert LTC2992_ALERT_ENABLE_OV - Enable overvalue alert LTC2992_ALERT_ENABLE_ALL - Enable undervalue and overvalue alert

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_set_gpio_alert()

int ltc2992_set_gpio_alert	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		enum ltc2992_alert_value	alert_value )

Enable alert when GPIO level reaches beyond threshold limit.

Parameters

dev	- The device structure.
gpio	- GPIO to enable alert. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
alert_value	- Alert value to set. Example: LTC2992_ALERT_DISABLE_ALL - Disable alert LTC2992_ALERT_ENABLE_UV - Enable undervalue alert LTC2992_ALERT_ENABLE_OV - Enable overvalue alert LTC2992_ALERT_ENABLE_ALL - Enable undervalue and overvalue alert

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_set_gpio_max_thresh()

int ltc2992_set_gpio_max_thresh	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		uint32_t	thresh_value )

Set upper threshold level in a GPIO.

Parameters

dev	- The device structure.
gpio	- GPIO to set. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
thresh_value	- Set threshold.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_set_gpio_min_thresh()

int ltc2992_set_gpio_min_thresh	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		uint32_t	thresh_value )

Set lower threshold level in a GPIO.

Parameters

dev	- The device structure.
gpio	- GPIO to set. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
thresh_value	- Set threshold.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_set_gpio_output()

int ltc2992_set_gpio_output	(	struct ltc2992_dev *	dev,
		enum ltc2992_gpio	gpio,
		enum ltc2992_gpio_output	output )

Set GPIO output.

Parameters

dev	- The device structure.
gpio	- GPIO to set. Example: LTC2992_GPIO1 LTC2992_GPIO2 LTC2992_GPIO3 LTC2992_GPIO4
output	- GPIO output to set Example: LTC2992_GPIO_OUTPUT_HI_Z - Output high impedance. LTC2992_GPIO_OUTPUT_PULL_LOW - Pull output low.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_set_max_thresh()

int ltc2992_set_max_thresh	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		enum ltc2992_channel	chan,
		uint32_t	thresh_value )

Set upper thresh level for alert at a SENSE channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 LTC2992_SENSE2
chan	- Measured data channel. Example: LTC2992_VOLTAGE - Bus voltage thresh in millivolts. LTC2992_VSHUNT - Shunt voltage thresh in microvolts. LTC2992_CURRENT - Current thresh in milliamperes. LTC2992_POWER - Power thresh in milliwatts. LTC2992_ISUM - ISUM thresh in microvolts. LTC2992_PSUM - PSUM thresh in milliwatts.
thresh_value	- Thresh level to set.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_set_min_thresh()

int ltc2992_set_min_thresh	(	struct ltc2992_dev *	dev,
		enum ltc2992_sense	sense,
		enum ltc2992_channel	chan,
		uint32_t	thresh_value )

Set lower thresh level for alert at a SENSE channel.

Parameters

dev	- The device structure.
sense	- Sense channel. Example: LTC2992_SENSE1 LTC2992_SENSE2
chan	- Measured data channel. Example: LTC2992_VOLTAGE - Bus voltage thresh in millivolts. LTC2992_VSHUNT - Shunt voltage thresh in microvolts. LTC2992_CURRENT - Current thresh in milliamperes. LTC2992_POWER - Power thresh in milliwatts. LTC2992_ISUM - ISUM thresh in microvolts. LTC2992_PSUM - PSUM thresh in milliwatts.
thresh_value	- Thresh level to set.

Returns: 0 in case of success, negative error code otherwise.

◆ ltc2992_update_reg()

int ltc2992_update_reg	(	struct ltc2992_dev *	dev,
		uint8_t	addr,
		uint8_t	mask,
		uint8_t	val )

Update register value in the device.

Parameters

dev	- The device structure.
addr	- The register address.
mask	- Mask of the bitfield to be updated.
val	- Value to write.

Returns: 0 in case of success, negative error code otherwise.

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◆ ltc2992_write_reg()

int ltc2992_write_reg	(	struct ltc2992_dev *	dev,
		uint8_t	addr,
		uint32_t	value,
		uint8_t	num_bytes )

Write raw data to device register.

Parameters

dev	- The device structure.
addr	- The register address.
value	- Value to write.
num_bytes	- Number of bytes to write.

Returns: 0 in case of success, negative error code otherwise.

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Functions

Function Documentation

◆ ltc2992_addr_gen()

◆ ltc2992_clear_fault()

◆ ltc2992_clear_gpio_fault()

◆ ltc2992_get_current()

◆ ltc2992_get_fault()

◆ ltc2992_get_gpio_data()

◆ ltc2992_get_gpio_fault()

◆ ltc2992_get_gpio_max_data()

◆ ltc2992_get_gpio_min_data()

◆ ltc2992_get_gpio_state()

◆ ltc2992_get_max_data()

◆ ltc2992_get_min_data()

◆ ltc2992_get_power()

◆ ltc2992_get_sense_data()

◆ ltc2992_get_sum()

◆ ltc2992_get_voltage()

◆ ltc2992_get_vshunt()

◆ ltc2992_init()

◆ ltc2992_read_reg()

◆ ltc2992_remove()

◆ ltc2992_reset_alert_pin()

◆ ltc2992_set_alert()

◆ ltc2992_set_gpio_alert()

◆ ltc2992_set_gpio_max_thresh()

◆ ltc2992_set_gpio_min_thresh()

◆ ltc2992_set_gpio_output()

◆ ltc2992_set_max_thresh()

◆ ltc2992_set_min_thresh()

◆ ltc2992_update_reg()

◆ ltc2992_write_reg()