ltc2983.h File Reference

#include <stdbool.h>
#include "no_os_gpio.h"
#include "no_os_spi.h"
#include "no_os_util.h"

Include dependency graph for ltc2983.h:

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Go to the source code of this file.

Classes
struct	ltc2983_init_param
	LTC2983 init param. More...
struct	ltc2983_desc
	LTC2983 descriptor. More...
struct	ltc2983_sensor
	common LTC2983 sensor struct More...
struct	ltc2983_custom_sensor
	custom LTC2983 sensor struct More...
struct	ltc2983_thermocouple
	thermocouple sensor descriptor for LTC2983 More...
struct	ltc2983_rtd
	RTD sensor descriptor for LTC2983. More...
struct	ltc2983_thermistor
	thermistor sensor descriptor for LTC2983 More...
struct	ideal_factor_value
	LTC2983 diode ideal factor value. More...
struct	ltc2983_diode
	diode sensor descriptor for LTC2983 More...
struct	r_sense_value
	LTC2983 sense resistance value. More...
struct	ltc2983_rsense
	sense resistor descriptor for LTC2983 More...
struct	ltc2983_adc
	direct ADC descriptor for LTC2983 More...
struct	ltc2983_temp
	analog temperature sensor descriptor for LTC2983 More...

Macros
#define	LTC2983_STATUS_REG   0x0000
#define	LTC2983_TEMP_RES_START_REG   0x0010
#define	LTC2983_EEPROM_KEY_REG   0x00B0
#define	LTC2983_EEPROM_READ_STATUS_REG   0x00D0
#define	LTC2983_GLOBAL_CONFIG_REG   0x00F0
#define	LTC2986_EEPROM_STATUS_REG   0x00F9
#define	LTC2983_MUX_CONFIG_REG   0x00FF
#define	LTC2983_CHAN_ASSIGN_START_REG   0x0200
#define	LTC2983_CUST_SENS_TBL_START_REG   0x0250
#define	LTC2983_CUST_SENS_TBL_END_REG   0x03CF
#define	ADT7604_RES_RES_START_REG   0x0060
#define	ADT7604_RES_RES_ADDR(chan)
#define	LTC2983_CUST_SENS_TBL_SIZE
#define	LTC2983_SPI_READ_BYTE   0x3
#define	LTC2983_SPI_WRITE_BYTE   0x2
#define	LTC2983_EEPROM_KEY   0xA53C0F5A
#define	LTC2983_EEPROM_WRITE_CMD   0x15
#define	LTC2983_EEPROM_READ_CMD   0x16
#define	LTC2983_EEPROM_STATUS_FAILURE_MASK   NO_OS_GENMASK(3, 1)
#define	LTC2983_EEPROM_READ_FAILURE_MASK   NO_OS_GENMASK(7, 0)
#define	LTC2983_EEPROM_WRITE_TIME_MS   2600
#define	LTC2983_EEPROM_READ_TIME_MS   20
#define	LTC2983_CHAN_START_ADDR(chan)
#define	LTC2983_CHAN_RES_ADDR(chan)
#define	LTC2983_COMMON_HARD_FAULT_MASK   NO_OS_GENMASK(31, 30)
#define	LTC2983_COMMON_SOFT_FAULT_MASK   NO_OS_GENMASK(27, 25)
#define	LTC2983_STATUS_START_MASK   NO_OS_BIT(7)
#define	LTC2983_STATUS_START(x)
#define	LTC2983_STATUS_UP_MASK   NO_OS_GENMASK(7, 6)
#define	LTC2983_STATUS_UP(reg)
#define	LTC2983_STATUS_CHAN_SEL_MASK   NO_OS_GENMASK(4, 0)
#define	LTC2983_STATUS_CHAN_SEL(x)
#define	LTC2983_NOTCH_FREQ_MASK   NO_OS_GENMASK(1, 0)
#define	LTC2983_RES_VALID_MASK   NO_OS_BIT(24)
#define	LTC2983_DATA_SIGN_BIT   23
#define	LTC2983_DATA_MASK   NO_OS_GENMASK(LTC2983_DATA_SIGN_BIT, 0)
#define	LTC2983_CHAN_TYPE_MASK   NO_OS_GENMASK(31, 27)
#define	LTC2983_CHAN_TYPE(x)
#define	LTC2983_CHAN_ASSIGN_MASK   NO_OS_GENMASK(26, 22)
#define	LTC2983_CHAN_ASSIGN(x)
#define	LTC2983_CUSTOM_LEN_MASK   NO_OS_GENMASK(5, 0)
#define	LTC2983_CUSTOM_LEN(x)
#define	LTC2983_CUSTOM_ADDR_MASK   NO_OS_GENMASK(11, 6)
#define	LTC2983_CUSTOM_ADDR(x)
#define	LTC2983_THERMOCOUPLE_CFG_MASK   NO_OS_GENMASK(21, 18)
#define	LTC2983_THERMOCOUPLE_CFG(x)
#define	LTC2983_THERMOCOUPLE_HARD_FAULT_MASK   NO_OS_GENMASK(31, 29)
#define	LTC2983_THERMOCOUPLE_SOFT_FAULT_MASK   NO_OS_GENMASK(28, 25)
#define	LTC2983_RTD_CFG_MASK   NO_OS_GENMASK(21, 18)
#define	LTC2983_RTD_CFG(x)
#define	LTC2983_RTD_EXC_CURRENT_MASK   NO_OS_GENMASK(17, 14)
#define	LTC2983_RTD_EXC_CURRENT(x)
#define	LTC2983_RTD_CURVE_MASK   NO_OS_GENMASK(13, 12)
#define	LTC2983_RTD_CURVE(x)
#define	LTC2983_THERMISTOR_CFG_MASK   NO_OS_GENMASK(21, 19)
#define	LTC2983_THERMISTOR_CFG(x)
#define	LTC2983_THERMISTOR_EXC_CURRENT_MASK   NO_OS_GENMASK(18, 15)
#define	LTC2983_THERMISTOR_EXC_CURRENT(x)
#define	LTC2983_DIODE_CFG_MASK   NO_OS_GENMASK(26, 24)
#define	LTC2983_DIODE_CFG(x)
#define	LTC2983_DIODE_EXC_CURRENT_MASK   NO_OS_GENMASK(23, 22)
#define	LTC2983_DIODE_EXC_CURRENT(x)
#define	LTC2983_DIODE_IDEAL_FACTOR_MASK   NO_OS_GENMASK(21, 0)
#define	LTC2983_DIODE_IDEAL_FACTOR(x)
#define	LTC2983_R_SENSE_VAL_MASK   NO_OS_GENMASK(26, 0)
#define	LTC2983_R_SENSE_VAL(x)
#define	LTC2983_ADC_SINGLE_ENDED_MASK   NO_OS_BIT(26)
#define	LTC2983_ADC_SINGLE_ENDED(x)
#define	to_thermocouple(_sensor)
#define	to_rtd(_sensor)
#define	to_thermistor(_sensor)
#define	to_diode(_sensor)
#define	to_rsense(_sensor)
#define	to_adc(_sensor)
#define	to_temp(_sensor)

Enumerations
enum	ltc298x_id {   ID_LTC2983 ,   ID_LTC2984 ,   ID_LTC2986 ,   ID_ADT7604 }
enum	ltc2983_filter_notch_freq {   LTC2983_50_60HZ_REJECTION ,   LTC2983_60HZ_REJECTION ,   LTC2983_50HZ_REJECTION }
	Notch frequency of the digital filter. More...
enum	ltc2983_sensor_type {   LTC2983_UNASSIGNED ,   LTC2983_THERMOCOUPLE_J ,   LTC2983_THERMOCOUPLE_K ,   LTC2983_THERMOCOUPLE_E ,   LTC2983_THERMOCOUPLE_N ,   LTC2983_THERMOCOUPLE_R ,   LTC2983_THERMOCOUPLE_S ,   LTC2983_THERMOCOUPLE_T ,   LTC2983_THERMOCOUPLE_B ,   LTC2983_THERMOCOUPLE_CUSTOM ,   LTC2983_RTD_PT_10 ,   LTC2983_RTD_PT_50 ,   LTC2983_RTD_PT_100 ,   LTC2983_RTD_PT_200 ,   LTC2983_RTD_PT_500 ,   LTC2983_RTD_PT_1000 ,   LTC2983_RTD_1000 ,   LTC2983_RTD_NI_120 ,   LTC2983_RTD_CUSTOM ,   LTC2983_THERMISTOR_44004_44033 ,   LTC2983_THERMISTOR_44005_44030 ,   LTC2983_THERMISTOR_44007_44034 ,   LTC2983_THERMISTOR_44006_44031 ,   LTC2983_THERMISTOR_44008_44032 ,   LTC2983_THERMISTOR_YSI_400 ,   LTC2983_THERMISTOR_SPECTRUM_1003K ,   LTC2983_THERMISTOR_CUSTOM_STEINHART_HART ,   LTC2983_THERMISTOR_CUSTOM ,   LTC2983_DIODE ,   LTC2983_RSENSE ,   LTC2983_DIRECT_ADC ,   LTC2983_ACTIVE_TEMP }
	LTC2983 Sensor Type. More...

Functions
int	ltc2983_init (struct ltc2983_desc **, struct ltc2983_init_param *)
	Device and comm init function.
int	ltc2983_remove (struct ltc2983_desc *)
	Remove resources allocated by the init function.
int	ltc2983_reg_read (struct ltc2983_desc *, uint16_t, uint8_t *)
	Read raw register value.
int	ltc2983_reg_write (struct ltc2983_desc *, uint16_t, uint8_t)
	Write raw register value.
int	ltc2983_reg_update_bits (struct ltc2983_desc *, uint16_t, uint8_t, uint8_t)
	Update register value.
int	ltc2983_setup (struct ltc2983_desc *)
	Device setup.
int	ltc2983_chan_read (struct ltc2983_desc *, const int, int *)
	Read channel data / temperature.
int	ltc2983_chan_read_raw (struct ltc2983_desc *, const int, uint32_t *)
	Read raw channel data / temperature.
int	ltc2983_chan_read_scale (struct ltc2983_desc *, const int, uint32_t *, uint32_t *)
	Set scale of raw channel data / temperature.
int	ltc2983_chan_read_scale_resistance (struct ltc2983_desc *, const int, uint32_t *, uint32_t *)
	Get resistance scale for copper trace or leak detector channels.
int	ltc2983_thermocouple_assign_chan (struct ltc2983_desc *, const struct ltc2983_sensor *)
	Channel assignment for thermocouple sensors.
int	ltc2983_rtd_assign_chan (struct ltc2983_desc *, const struct ltc2983_sensor *)
	Channel assignment for RTD sensors.
int	ltc2983_thermistor_assign_chan (struct ltc2983_desc *, const struct ltc2983_sensor *)
	Channel assignment for thermistor sensors.
int	ltc2983_diode_assign_chan (struct ltc2983_desc *, const struct ltc2983_sensor *)
	Channel assignment for diode sensors.
int	ltc2983_r_sense_assign_chan (struct ltc2983_desc *, const struct ltc2983_sensor *)
	Channel assignment for rsense.
int	ltc2983_adc_assign_chan (struct ltc2983_desc *, const struct ltc2983_sensor *)
	Channel assignment for direct ADC.
int	ltc2983_temp_assign_chan (struct ltc2983_desc *, const struct ltc2983_sensor *)
int	ltc2983_chan_read_resistance (struct ltc2983_desc *, const int, uint32_t *)
	Read raw resistance from the ADT7604 resistance result bank (0x0060)
int	ltc2983_thermocouple_fault_handler (const uint32_t)
	Fault handling of thermocouple sensors.
int	ltc2983_common_fault_handler (const uint32_t)
	Fault handling of sensors other than thermocouple.

Macro Definition Documentation

ADT7604_RES_RES_ADDR

#define ADT7604_RES_RES_ADDR

(

chan

)

Value:

            (((chan) - 1) * 4 + ADT7604_RES_RES_START_REG)

ADT7604_RES_RES_START_REG

#define ADT7604_RES_RES_START_REG   0x0060

LTC2983_ADC_SINGLE_ENDED

#define LTC2983_ADC_SINGLE_ENDED

(

x

)

Value:

            no_os_field_prep(LTC2983_ADC_SINGLE_ENDED_MASK, x)

LTC2983_ADC_SINGLE_ENDED_MASK

#define LTC2983_ADC_SINGLE_ENDED_MASK   NO_OS_BIT(26)

LTC2983_CHAN_ASSIGN

#define LTC2983_CHAN_ASSIGN

(

x

)

Value:

no_os_field_prep(LTC2983_CHAN_ASSIGN_MASK, x)

LTC2983_CHAN_ASSIGN_MASK

#define LTC2983_CHAN_ASSIGN_MASK   NO_OS_GENMASK(26, 22)

LTC2983_CHAN_ASSIGN_START_REG

#define LTC2983_CHAN_ASSIGN_START_REG   0x0200

LTC2983_CHAN_RES_ADDR

#define LTC2983_CHAN_RES_ADDR

(

chan

)

Value:

            (((chan - 1) * 4) + LTC2983_TEMP_RES_START_REG)

LTC2983_CHAN_START_ADDR

#define LTC2983_CHAN_START_ADDR

(

chan

)

Value:

            (((chan - 1) * 4) + LTC2983_CHAN_ASSIGN_START_REG)

LTC2983_CHAN_TYPE

#define LTC2983_CHAN_TYPE

(

x

)

Value:

no_os_field_prep(LTC2983_CHAN_TYPE_MASK, x)

LTC2983_CHAN_TYPE_MASK

#define LTC2983_CHAN_TYPE_MASK   NO_OS_GENMASK(31, 27)

LTC2983_COMMON_HARD_FAULT_MASK

#define LTC2983_COMMON_HARD_FAULT_MASK   NO_OS_GENMASK(31, 30)

LTC2983_COMMON_SOFT_FAULT_MASK

#define LTC2983_COMMON_SOFT_FAULT_MASK   NO_OS_GENMASK(27, 25)

LTC2983_CUST_SENS_TBL_END_REG

#define LTC2983_CUST_SENS_TBL_END_REG   0x03CF

LTC2983_CUST_SENS_TBL_SIZE

#define LTC2983_CUST_SENS_TBL_SIZE

Value:

                    LTC2983_CUST_SENS_TBL_END_REG - \
                    LTC2983_CUST_SENS_TBL_START_REG + 1

LTC2983_CUST_SENS_TBL_START_REG

#define LTC2983_CUST_SENS_TBL_START_REG   0x0250

LTC2983_CUSTOM_ADDR

#define LTC2983_CUSTOM_ADDR

(

x

)

Value:

no_os_field_prep(LTC2983_CUSTOM_ADDR_MASK, x)

LTC2983_CUSTOM_ADDR_MASK

#define LTC2983_CUSTOM_ADDR_MASK   NO_OS_GENMASK(11, 6)

LTC2983_CUSTOM_LEN

#define LTC2983_CUSTOM_LEN

(

x

)

Value:

no_os_field_prep(LTC2983_CUSTOM_LEN_MASK, x)

LTC2983_CUSTOM_LEN_MASK

#define LTC2983_CUSTOM_LEN_MASK   NO_OS_GENMASK(5, 0)

LTC2983_DATA_MASK

#define LTC2983_DATA_MASK   NO_OS_GENMASK(LTC2983_DATA_SIGN_BIT, 0)

LTC2983_DATA_SIGN_BIT

#define LTC2983_DATA_SIGN_BIT   23

LTC2983_DIODE_CFG

#define LTC2983_DIODE_CFG

(

x

)

Value:

no_os_field_prep(LTC2983_DIODE_CFG_MASK, x)

LTC2983_DIODE_CFG_MASK

#define LTC2983_DIODE_CFG_MASK   NO_OS_GENMASK(26, 24)

LTC2983_DIODE_EXC_CURRENT

#define LTC2983_DIODE_EXC_CURRENT

(

x

)

Value:

            no_os_field_prep(LTC2983_DIODE_EXC_CURRENT_MASK, x)

LTC2983_DIODE_EXC_CURRENT_MASK

#define LTC2983_DIODE_EXC_CURRENT_MASK   NO_OS_GENMASK(23, 22)

LTC2983_DIODE_IDEAL_FACTOR

#define LTC2983_DIODE_IDEAL_FACTOR

(

x

)

Value:

            no_os_field_prep(LTC2983_DIODE_IDEAL_FACTOR_MASK, x)

LTC2983_DIODE_IDEAL_FACTOR_MASK

#define LTC2983_DIODE_IDEAL_FACTOR_MASK   NO_OS_GENMASK(21, 0)

LTC2983_EEPROM_KEY

#define LTC2983_EEPROM_KEY   0xA53C0F5A

LTC2983_EEPROM_KEY_REG

#define LTC2983_EEPROM_KEY_REG   0x00B0

LTC2983_EEPROM_READ_CMD

#define LTC2983_EEPROM_READ_CMD   0x16

LTC2983_EEPROM_READ_FAILURE_MASK

#define LTC2983_EEPROM_READ_FAILURE_MASK   NO_OS_GENMASK(7, 0)

LTC2983_EEPROM_READ_STATUS_REG

#define LTC2983_EEPROM_READ_STATUS_REG   0x00D0

LTC2983_EEPROM_READ_TIME_MS

#define LTC2983_EEPROM_READ_TIME_MS   20

LTC2983_EEPROM_STATUS_FAILURE_MASK

#define LTC2983_EEPROM_STATUS_FAILURE_MASK   NO_OS_GENMASK(3, 1)

LTC2983_EEPROM_WRITE_CMD

#define LTC2983_EEPROM_WRITE_CMD   0x15

LTC2983_EEPROM_WRITE_TIME_MS

#define LTC2983_EEPROM_WRITE_TIME_MS   2600

LTC2983_GLOBAL_CONFIG_REG

#define LTC2983_GLOBAL_CONFIG_REG   0x00F0

LTC2983_MUX_CONFIG_REG

#define LTC2983_MUX_CONFIG_REG   0x00FF

LTC2983_NOTCH_FREQ_MASK

#define LTC2983_NOTCH_FREQ_MASK   NO_OS_GENMASK(1, 0)

LTC2983_R_SENSE_VAL

#define LTC2983_R_SENSE_VAL

(

x

)

Value:

no_os_field_prep(LTC2983_R_SENSE_VAL_MASK, x)

LTC2983_R_SENSE_VAL_MASK

#define LTC2983_R_SENSE_VAL_MASK   NO_OS_GENMASK(26, 0)

LTC2983_RES_VALID_MASK

#define LTC2983_RES_VALID_MASK   NO_OS_BIT(24)

LTC2983_RTD_CFG

#define LTC2983_RTD_CFG

(

x

)

Value:

no_os_field_prep(LTC2983_RTD_CFG_MASK, x)

LTC2983_RTD_CFG_MASK

#define LTC2983_RTD_CFG_MASK   NO_OS_GENMASK(21, 18)

LTC2983_RTD_CURVE

#define LTC2983_RTD_CURVE

(

x

)

Value:

no_os_field_prep(LTC2983_RTD_CURVE_MASK, x)

LTC2983_RTD_CURVE_MASK

#define LTC2983_RTD_CURVE_MASK   NO_OS_GENMASK(13, 12)

LTC2983_RTD_EXC_CURRENT

#define LTC2983_RTD_EXC_CURRENT

(

x

)

Value:

            no_os_field_prep(LTC2983_RTD_EXC_CURRENT_MASK, x)

LTC2983_RTD_EXC_CURRENT_MASK

#define LTC2983_RTD_EXC_CURRENT_MASK   NO_OS_GENMASK(17, 14)

LTC2983_SPI_READ_BYTE

#define LTC2983_SPI_READ_BYTE   0x3

LTC2983_SPI_WRITE_BYTE

#define LTC2983_SPI_WRITE_BYTE   0x2

LTC2983_STATUS_CHAN_SEL

#define LTC2983_STATUS_CHAN_SEL

(

x

)

Value:

            no_os_field_prep(LTC2983_STATUS_CHAN_SEL_MASK, x)

LTC2983_STATUS_CHAN_SEL_MASK

#define LTC2983_STATUS_CHAN_SEL_MASK   NO_OS_GENMASK(4, 0)

LTC2983_STATUS_REG

#define LTC2983_STATUS_REG   0x0000

LTC2983_STATUS_START

#define LTC2983_STATUS_START

(

x

)

Value:

no_os_field_prep(LTC2983_STATUS_START_MASK, x)

LTC2983_STATUS_START_MASK

#define LTC2983_STATUS_START_MASK   NO_OS_BIT(7)

LTC2983_STATUS_UP

#define LTC2983_STATUS_UP

(

reg

)

Value:

no_os_field_get(LTC2983_STATUS_UP_MASK, reg)

LTC2983_STATUS_UP_MASK

#define LTC2983_STATUS_UP_MASK   NO_OS_GENMASK(7, 6)

LTC2983_TEMP_RES_START_REG

#define LTC2983_TEMP_RES_START_REG   0x0010

LTC2983_THERMISTOR_CFG

#define LTC2983_THERMISTOR_CFG

(

x

)

Value:

                no_os_field_prep(LTC2983_THERMISTOR_CFG_MASK, x)

LTC2983_THERMISTOR_CFG_MASK

#define LTC2983_THERMISTOR_CFG_MASK   NO_OS_GENMASK(21, 19)

LTC2983_THERMISTOR_EXC_CURRENT

#define LTC2983_THERMISTOR_EXC_CURRENT

(

x

)

Value:

            no_os_field_prep(LTC2983_THERMISTOR_EXC_CURRENT_MASK, x)

LTC2983_THERMISTOR_EXC_CURRENT_MASK

#define LTC2983_THERMISTOR_EXC_CURRENT_MASK   NO_OS_GENMASK(18, 15)

LTC2983_THERMOCOUPLE_CFG

#define LTC2983_THERMOCOUPLE_CFG

(

x

)

Value:

            no_os_field_prep(LTC2983_THERMOCOUPLE_CFG_MASK, x)

LTC2983_THERMOCOUPLE_CFG_MASK

#define LTC2983_THERMOCOUPLE_CFG_MASK   NO_OS_GENMASK(21, 18)

LTC2983_THERMOCOUPLE_HARD_FAULT_MASK

#define LTC2983_THERMOCOUPLE_HARD_FAULT_MASK   NO_OS_GENMASK(31, 29)

LTC2983_THERMOCOUPLE_SOFT_FAULT_MASK

#define LTC2983_THERMOCOUPLE_SOFT_FAULT_MASK   NO_OS_GENMASK(28, 25)

LTC2986_EEPROM_STATUS_REG

#define LTC2986_EEPROM_STATUS_REG   0x00F9

to_adc

#define to_adc

(

_sensor

)

Value:

        NO_OS_CONTAINER_OF(_sensor, struct ltc2983_adc, sensor)

to_diode

#define to_diode

(

_sensor

)

Value:

        NO_OS_CONTAINER_OF(_sensor, struct ltc2983_diode, sensor)

to_rsense

#define to_rsense

(

_sensor

)

Value:

        NO_OS_CONTAINER_OF(_sensor, struct ltc2983_rsense, sensor)

to_rtd

#define to_rtd

(

_sensor

)

Value:

        NO_OS_CONTAINER_OF(_sensor, struct ltc2983_rtd, sensor)

to_temp

#define to_temp

(

_sensor

)

Value:

        NO_OS_CONTAINER_OF(_sensor, struct ltc2983_temp, sensor)

to_thermistor

#define to_thermistor

(

_sensor

)

Value:

        NO_OS_CONTAINER_OF(_sensor, struct ltc2983_thermistor, sensor)

to_thermocouple

#define to_thermocouple

(

_sensor

)

Value:

        NO_OS_CONTAINER_OF(_sensor, struct ltc2983_thermocouple, sensor)

Enumeration Type Documentation

ltc2983_filter_notch_freq

enum ltc2983_filter_notch_freq

Notch frequency of the digital filter.

Enumerator
LTC2983_50_60HZ_REJECTION
LTC2983_60HZ_REJECTION
LTC2983_50HZ_REJECTION

ltc2983_sensor_type

enum ltc2983_sensor_type

LTC2983 Sensor Type.

Enumerator
LTC2983_UNASSIGNED
LTC2983_THERMOCOUPLE_J
LTC2983_THERMOCOUPLE_K
LTC2983_THERMOCOUPLE_E
LTC2983_THERMOCOUPLE_N
LTC2983_THERMOCOUPLE_R
LTC2983_THERMOCOUPLE_S
LTC2983_THERMOCOUPLE_T
LTC2983_THERMOCOUPLE_B
LTC2983_THERMOCOUPLE_CUSTOM
LTC2983_RTD_PT_10
LTC2983_RTD_PT_50
LTC2983_RTD_PT_100
LTC2983_RTD_PT_200
LTC2983_RTD_PT_500
LTC2983_RTD_PT_1000
LTC2983_RTD_1000
LTC2983_RTD_NI_120
LTC2983_RTD_CUSTOM
LTC2983_THERMISTOR_44004_44033
LTC2983_THERMISTOR_44005_44030
LTC2983_THERMISTOR_44007_44034
LTC2983_THERMISTOR_44006_44031
LTC2983_THERMISTOR_44008_44032
LTC2983_THERMISTOR_YSI_400
LTC2983_THERMISTOR_SPECTRUM_1003K
LTC2983_THERMISTOR_CUSTOM_STEINHART_HART
LTC2983_THERMISTOR_CUSTOM
LTC2983_DIODE
LTC2983_RSENSE
LTC2983_DIRECT_ADC
LTC2983_ACTIVE_TEMP

ltc298x_id

enum ltc298x_id

Enumerator
ID_LTC2983
ID_LTC2984
ID_LTC2986
ID_ADT7604

Function Documentation

ltc2983_adc_assign_chan()

int ltc2983_adc_assign_chan	(	struct ltc2983_desc *	device,
		const struct ltc2983_sensor *	sensor )

Channel assignment for direct ADC.

Channel assignment for direct ADC

Parameters

device	- LTC2983 descriptor
sensor	- LTC2983 common sensor descriptor

Returns

0 in case of success, errno errors otherwise

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ltc2983_chan_read()

int ltc2983_chan_read	(	struct ltc2983_desc *	device,
		const int	chan,
		int *	val )

Read channel data / temperature.

Read channel data / temperature or coverage

Parameters

device	- LTC2983 descriptor
chan	- channel number
val	- channel data / temperature

Returns

0 in case of success, errno errors otherwise

For copper trace (LTC2983_RTD_CUSTOM) and leak detector (LTC2983_THERMISTOR_CUSTOM) channels, use ltc2983_chan_read_resistance() to read raw resistance from the ADT7604 resistance bank. The IIO resistance scales (1/1024000 Ohm/LSB for copper trace, 1/1024 Ohm/LSB for leak detector) cause precision loss in integer arithmetic.

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ltc2983_chan_read_raw()

int ltc2983_chan_read_raw	(	struct ltc2983_desc *	device,
		const int	chan,
		uint32_t *	val )

Read raw channel data / temperature.

Read raw channel data / temperature

Parameters

device	- LTC2983 descriptor
chan	- channel number
val	- raw channel data / temperature

Returns

0 in case of success, errno errors otherwise

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ltc2983_chan_read_resistance()

int ltc2983_chan_read_resistance	(	struct ltc2983_desc *	device,
		const int	chan,
		uint32_t *	val )

Read raw resistance from the ADT7604 resistance result bank (0x0060)

Read raw resistance from ADT7604 resistance result bank (0x0060)

Parameters

device	- LTC2983 descriptor
chan	- channel number (1-indexed)
val	- raw resistance value (bits[30:0], unsigned)

Returns

0 in case of success, errno errors otherwise

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ltc2983_chan_read_scale()

int ltc2983_chan_read_scale	(	struct ltc2983_desc *	device,
		const int	chan,
		uint32_t *	val,
		uint32_t *	val2 )

Set scale of raw channel data / temperature.

Get scale of raw channel data / temperature or coverage

Parameters

device	- LTC2983 descriptor
chan	- channel number
val	- scale numerator
val2	- scale denominator

Returns

0 in case of success, errno errors otherwise

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ltc2983_chan_read_scale_resistance()

int ltc2983_chan_read_scale_resistance	(	struct ltc2983_desc *	device,
		const int	chan,
		uint32_t *	val,
		uint32_t *	val2 )

Get resistance scale for copper trace or leak detector channels.

Get resistance scale for copper trace or leak detector channels

Parameters

device	- LTC2983 descriptor
chan	- channel number
val	- scale numerator
val2	- scale denominator

Returns

0 in case of success, errno errors otherwise

ltc2983_common_fault_handler()

int ltc2983_common_fault_handler

(

const uint32_t

result

)

Fault handling of sensors other than thermocouple.

Fault handling of sensors other than thermocouple

Parameters

result

- result captured that contains the faults

Returns

0 in case of success, errno errors otherwise

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ltc2983_diode_assign_chan()

int ltc2983_diode_assign_chan	(	struct ltc2983_desc *	device,
		const struct ltc2983_sensor *	sensor )

Channel assignment for diode sensors.

Channel assignment for diode sensors

Parameters

device	- LTC2983 descriptor
sensor	- LTC2983 common sensor descriptor

Returns

0 in case of success, errno errors otherwise

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ltc2983_init()

int ltc2983_init	(	struct ltc2983_desc **	device,
		struct ltc2983_init_param *	init_param )

Device and comm init function.

Device and comm init function

Parameters

device	- LTC2983 descriptor to be initialized
init_param	- Init parameter for descriptor

Returns

0 in case of success, errno errors otherwise

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ltc2983_r_sense_assign_chan()

int ltc2983_r_sense_assign_chan	(	struct ltc2983_desc *	device,
		const struct ltc2983_sensor *	sensor )

Channel assignment for rsense.

Channel assignment for rsense

Parameters

device	- LTC2983 descriptor
sensor	- LTC2983 common sensor descriptor

Returns

0 in case of success, errno errors otherwise

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ltc2983_reg_read()

int ltc2983_reg_read	(	struct ltc2983_desc *	device,
		uint16_t	reg_addr,
		uint8_t *	val )

Read raw register value.

Read raw register value

Parameters

device	- LTC2983 descriptor
reg_addr	- register address
val	- register value

Returns

0 in case of success, negative error code otherwise

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ltc2983_reg_update_bits()

int ltc2983_reg_update_bits	(	struct ltc2983_desc *	device,
		uint16_t	reg_addr,
		uint8_t	mask,
		uint8_t	val )

Update register value.

Update register value

Parameters

device	- LTC2983 descriptor
reg_addr	- register address
mask	- Mask for specific register bits to be updated
val	- register value to be written

Returns

0 in case of success, negative error code otherwise

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ltc2983_reg_write()

int ltc2983_reg_write	(	struct ltc2983_desc *	device,
		uint16_t	reg_addr,
		uint8_t	val )

Write raw register value.

Write raw register value

Parameters

device	- LTC2983 descriptor
reg_addr	- register address
val	- register value

Returns

0 in case of success, negative error code otherwise

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ltc2983_remove()

int ltc2983_remove

(

struct ltc2983_desc *

device

)

Remove resources allocated by the init function.

Free resources allocated by the init function

Parameters

device

- LTC2983 descriptor

Returns

0 in case of success, errno errors otherwise

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ltc2983_rtd_assign_chan()

int ltc2983_rtd_assign_chan	(	struct ltc2983_desc *	device,
		const struct ltc2983_sensor *	sensor )

Channel assignment for RTD sensors.

Channel assignment for RTD sensors

Parameters

device	- LTC2983 descriptor
sensor	- LTC2983 common sensor descriptor

Returns

0 in case of success, errno errors otherwise

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ltc2983_setup()

int ltc2983_setup

(

struct ltc2983_desc *

device

)

Device setup.

Device setup

Parameters

device

- LTC2983 descriptor

Returns

0 in case of success, errno errors otherwise

make sure the device is up: start bit (7) is 0 and done bit (6) is 1

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ltc2983_temp_assign_chan()

int ltc2983_temp_assign_chan	(	struct ltc2983_desc *	device,
		const struct ltc2983_sensor *	sensor )

Channel assignment for analog temp sensor

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ltc2983_thermistor_assign_chan()

int ltc2983_thermistor_assign_chan	(	struct ltc2983_desc *	device,
		const struct ltc2983_sensor *	sensor )

Channel assignment for thermistor sensors.

Channel assignment for thermistor sensors

Parameters

device	- LTC2983 descriptor
sensor	- LTC2983 common sensor descriptor

Returns

0 in case of success, errno errors otherwise

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ltc2983_thermocouple_assign_chan()

int ltc2983_thermocouple_assign_chan	(	struct ltc2983_desc *	device,
		const struct ltc2983_sensor *	sensor )

Channel assignment for thermocouple sensors.

Channel assignment for thermocouple sensors

Parameters

device	- LTC2983 descriptor
sensor	- LTC2983 common sensor descriptor

Returns

0 in case of success, errno errors otherwise

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ltc2983_thermocouple_fault_handler()

int ltc2983_thermocouple_fault_handler

(

const uint32_t

result

)

Fault handling of thermocouple sensors.

Fault handling of thermocouple sensors

Parameters

result

- result captured that contains the faults

Returns

0 in case of success, errno errors otherwise

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