#include <TLI4971.h>

Public Types
enum	OCDMODE { NONE, INTERRUPT, POLLING }

enum	MEASRANGE { FSR120 = 0x05, FSR100 = 0x06, FSR75 = 0x08, FSR50 = 0x0C, FSR37_5 = 0x10, FSR25 = 0x18 }

enum	OPMODE { SD_BID = 0, FD = 0x1<<5, SD_UNI = 0x2<<5, S_ENDED = 0x3<<5 }

enum	OCDDEGLITCH { D0, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15 }

enum	OCDTHR { THR1_1, THR1_2, THR1_3, THR1_4, THR1_5, THR1_6, THR1_7, THR1_8, THR2_1, THR2_2, THR2_3, THR2_4, THR2_5, THR2_6, THR2_7, THR2_8 }

enum	VRefExt { V1_65, V1_2, V1_5, V1_8, V2_5 }

Public Member Functions
	TLI4971 (int aout, int vref, int pwr, int sici, int ocd1, int ocd2, int mux, bool mc5V=true)
	Current sensor instance constructor. More...

	~TLI4971 (void)
	Current sensor instance destructor . Reconfigurates pins to INPUT and ADC resolution to 8 Bit. More...

bool	begin (void)
	Turn on sensor supply, initialy reads sensor configuration and checks if sensor can be configurated. More...

bool	reset (void)
	Resets sensor to factory settings. More...

void	end (void)
	Ends sensor library Turn off sensor supply. More...

double	read (void)
	Reads sensor outputs and calculates current value. If Software OCD is used, this function can trigger the handler. More...

void	ocdPolling (void)
	If polling is used as OCD mode this function will perform the polling. Needs to be called repeatedly, e.g. in loop. Handler functions for OCD-signals will be called by this method. SW-OCD will be detected as well, if in use. More...

void	configAdc (bool logicLevel5V, int adcResolution=-1)
	Configurate ADC. More...

double	getLastSwOcdCurrent (void)
	As soon as a Software OCD is triggered, the current value (> threshold) is stored. This function returns it. More...

bool	registerOcd1Function (int mode, void(*func)(void))
	Register a handler, which shall be called when the sensor triggeres OCD1. More...

bool	registerOcd2Function (int mode, void(*func)(void))
	Register a handler which shall be called when the sensor triggeres OCD2. More...

bool	registerSwOcdFunction (double currentLevel, void(*func)(void))
	Register a handler, which shall be called when the sensor value exceeds a certain threshold. More...

bool	setMeasRange (int measuringRange)
	Sets the measurement Range of the sensor (refer to Programming Guide). More...

bool	setOpMode (int operatingMode)
	Set operating mode of the sensor (refer to Programming guide). More...

bool	configOcd1 (bool enable, int threshold=THR1_1, int deglitchTime=D0)
	Configuration of OCD1. More...

bool	configOcd2 (bool enable, int threshold=THR2_1, int deglitchTime=D0)
	Configuration of OCD2. More...

bool	setOcdCompHyst (int threshold)
	Sets the OCD hysteresis. OCD signals will reset if current < 20% of the provided threshold. More...

bool	setSwOcdCompHyst (double hysterese)
	Set Hysteresis value for SW-OCD. Signal will be reset when current < threshold - hysteresis. More...

bool	setVrefExt (int vrefExtVoltage)
	Sets the reference voltage level. This can be used for Single Ended mode (setting needs to match external reference voltage), as well as Semi-differential Uni-directional mode (sensor will output this voltage at vRef). More...

bool	setRatioGain (bool enable)
	If this is enabled the sensitivity is ratio-metric to VDD respective to VREF in single-ended mode. Default is disabled. More...

bool	setRatioOff (bool enable)
	If this is enabled the ratio-metric offset behavior of the quiescent voltage is activated. Default is disabled. More...

bool	getOcd1State (void)
	Reads state of ocd1-pin from sensor. More...

bool	getOcd2State (void)
	Reads state of ocd2-pin from sensor. More...

bool	getSwOcdState (void)
	Get state of Software OCD. More...

Member Enumeration Documentation

enum TLI4971::OCDMODE

Enumerator
NONE
INTERRUPT
POLLING

enum TLI4971::MEASRANGE

Enumerator
FSR120
FSR100
FSR75
FSR50
FSR37_5
FSR25

enum TLI4971::OPMODE

Enumerator
SD_BID
FD
SD_UNI
S_ENDED

enum TLI4971::OCDDEGLITCH

Enumerator
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15

enum TLI4971::OCDTHR

Enumerator
THR1_1
THR1_2
THR1_3
THR1_4
THR1_5
THR1_6
THR1_7
THR1_8
THR2_1
THR2_2
THR2_3
THR2_4
THR2_5
THR2_6
THR2_7
THR2_8

enum TLI4971::VRefExt

Enumerator
V1_65
V1_2
V1_5
V1_8
V2_5

Constructor & Destructor Documentation

TLI4971::TLI4971	(	int	aout,
		int	vref,
		int	pwr,
		int	sici,
		int	ocd1,
		int	ocd2,
		int	mux,
		bool	mc5V = `true`
	)

Current sensor instance constructor.

Parameters

[in]	aout	analog channel for reading sensors analog output
[in]	vref	analog channel for sensors reference voltage output
[in]	pwr	pin for switching sensors VDD
[in]	sici	pin for SICI communication
[in]	ocd1	pin for over-current detection 1 signal of sensor
[in]	ocd2	pin for over-current detection 2 signal of sensor
[in]	mux	pin connected to analog mulitplexer on Shield2Go
[in]	mc5V	states whether microcontroller is a 5V or 3V3 device (needed for calculation)

Returns: void

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TLI4971::~TLI4971 ( void )

Current sensor instance destructor . Reconfigurates pins to INPUT and ADC resolution to 8 Bit.

Returns: void

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Member Function Documentation

bool TLI4971::begin ( void )

Turn on sensor supply, initialy reads sensor configuration and checks if sensor can be configurated.

Returns: bool

Return values

true	if sensor can be configurated
false	if sensor not available for configuration (SICI communication failed)

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bool TLI4971::reset ( void )

Resets sensor to factory settings.

Returns: bool

Return values

true	if restart succeded
false	if restart failed (SICI communication not possible)

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void TLI4971::end ( void )

Ends sensor library Turn off sensor supply.

Returns: void

double TLI4971::read ( void )

Reads sensor outputs and calculates current value. If Software OCD is used, this function can trigger the handler.

Returns: double

Return values

current value in Ampere

void TLI4971::ocdPolling ( void )

If polling is used as OCD mode this function will perform the polling. Needs to be called repeatedly, e.g. in loop. Handler functions for OCD-signals will be called by this method. SW-OCD will be detected as well, if in use.

Returns: void

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void TLI4971::configAdc	(	bool	logicLevel5V,
		int	adcResolution = `-1`
	)

Configurate ADC.

Parameters

[in]	logicLevel5V	true for 5V microcontrollers, false for 3.3V microcontrollers
[in]	adcResolution	number of Bits the ADC returns

Returns: void

double TLI4971::getLastSwOcdCurrent ( void )

As soon as a Software OCD is triggered, the current value (> threshold) is stored. This function returns it.

Returns: double

Return values

last	current value which triggered the Software-OCD

bool TLI4971::registerOcd1Function	(	int	mode,
		void(*)(void)	func
	)

Register a handler, which shall be called when the sensor triggeres OCD1.

Parameters

[in]	mode	INTERRUPT if hardware interrupt is available at the microcontroller for this pin. POLLING if no hardware interrupt is available for this pin. See as well ocdPolling() in this case.
[in]	*func	pointer to handler function

Returns: bool

Return values

true	if registering was possible
false	if registering failed

bool TLI4971::registerOcd2Function	(	int	mode,
		void(*)(void)	func
	)

Register a handler which shall be called when the sensor triggeres OCD2.

Parameters

[in]	mode	INTERRUPT if hardware interrupt is available at the microcontroller for this pin. POLLING if no hardware interrupt is available for this pin. Use as well ocdPolling() in this case.
[in]	*func	pointer to handler function

Returns: bool

Return values

true	if registering was possible
false	if registering failed

bool TLI4971::registerSwOcdFunction	(	double	currentLevel,
		void(*)(void)	func
	)

Register a handler, which shall be called when the sensor value exceeds a certain threshold.

Parameters

[in]	currentLevel	threshold in Ampere
[in]	*func	pointer to handler function

Returns: bool

Return values

true	if registering was possible
false	if registering failed

bool TLI4971::setMeasRange ( int measuringRange )

Sets the measurement Range of the sensor (refer to Programming Guide).

Parameters

[in] measuringRange Range of Current measurement. Possible values are: FSR120 = +/- 120A FSR100 = +/- 100A FSR75 = +/- 75A FSR50 = +/- 50A FSR37_5 = +/-37.5A FSR25 = +/- 25A

Returns: bool

Return values

true	if configuration succeeded
false	if configuration failed

bool TLI4971::setOpMode ( int operatingMode )

Set operating mode of the sensor (refer to Programming guide).

Parameters

[in] operatingMode Mode of sensor operation. Changes the behaviour of AOut and Vref dependent of the measured current. Possible modes are: SD_BID = Semi-differential Bi-directional: Sensor provides reference voltage. Current flow in both directions are measured. FD = fully differential: vref is used as differential output signal from sensor. Increases resolution by factor 2. SD_UNI = Semi-differential Uni-directional: Sensor provides reference voltage. Direction of current flow is known by the application. See setVrefExt() as well. SE = Single Ended: Reference Voltage is provided by the µC or an external circuit. See setVrefExt() as well.

Returns: bool

Return values

true	if configuration succeeded
false	if configuration failed

bool TLI4971::configOcd1	(	bool	enable,
		int	threshold = `THR1_1`,
		int	deglitchTime = `D0`
	)

Configuration of OCD1.

Parameters

[in]	enable	true to enable OCD1 signal, false to disable.
[in]	threshold	set a Threshold level for OCD1. Range: [THR1_1 - THR1_8] according to Programming guide.
[in]	deglitchTime	set a time for deglitching. Range: [D0 - D7] according to Programming guide.

Returns: bool

Return values

true	if configuration succeeded
false	if configuration failed

bool TLI4971::configOcd2	(	bool	enable,
		int	threshold = `THR2_1`,
		int	deglitchTime = `D0`
	)

Configuration of OCD2.

Parameters

[in]	enable	true to enable OCD2 signal, false to disable.
[in]	threshold	set a Threshold level for OCD2. Range: [THR2_1 - THR2_8] according to Programming guide.
[in]	deglitchTime	set a time for deglitching. Range: [D0 - D15] according to Programming guide.

Returns: bool

Return values

true	if configuration succeeded
false	if configuration failed

bool TLI4971::setOcdCompHyst ( int threshold )

Sets the OCD hysteresis. OCD signals will reset if current < 20% of the provided threshold.

Parameters

[in] threshold 20% of this Threshold are set as hysteresis for both OCD signals. Range: [THR1_1 - THR2_8]

Returns: bool

Return values

true	if configuration succeeded
false	if configuration failed

bool TLI4971::setSwOcdCompHyst ( double hysteresis )

Set Hysteresis value for SW-OCD. Signal will be reset when current < threshold - hysteresis.

Parameters

[in] hysteresis value in Ampere to be set as Hysteresis.

Returns: void

Return values

true	if setting hysteresis was successful
false	if setting hysteresis was not successful

bool TLI4971::setVrefExt ( int vrefExtVoltage )

Sets the reference voltage level. This can be used for Single Ended mode (setting needs to match external reference voltage), as well as Semi-differential Uni-directional mode (sensor will output this voltage at vRef).

Parameters

[in] vrefExtVoltage Voltage level to set at vRef. Possible levels: V1_65 = 1.65V V1_2 = 1.2V V1_5 = 1.5V V1_8 = 1.8V V2_5 = 2.5V

Returns: bool

Return values

true	if configuration succeeded
false	if configuration failed

bool TLI4971::setRatioGain ( bool enable )

If this is enabled the sensitivity is ratio-metric to VDD respective to VREF in single-ended mode. Default is disabled.

Parameters

[in] enable true: ratio-metric gain is enabled false: ratio-metric gain is disabled

Returns: bool

Return values

true	if configuration succeeded
false	if configuration failed

bool TLI4971::setRatioOff ( bool enable )

If this is enabled the ratio-metric offset behavior of the quiescent voltage is activated. Default is disabled.

Parameters

[in] enable true: ratio-metric offset is enabled false: ratio-metric offset is disabled

Returns: bool

Return values

true	if configuration succeeded
false	if configuration failed

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bool TLI4971::getOcd1State ( void )

Reads state of ocd1-pin from sensor.

Returns: bool

Return values

true	if OCD1 is triggered
false	if OCD1 is not triggered

bool TLI4971::getOcd2State ( void )

Reads state of ocd2-pin from sensor.

Returns: bool

Return values

true	if OCD2 is triggered
false	if OCD2 is not triggered

bool TLI4971::getSwOcdState ( void )

Get state of Software OCD.

Returns: bool

Return values

true	if Software-OCD is triggered
false	if Software-OCD is not triggered

The documentation for this class was generated from the following files:

Public Types

Public Member Functions

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation