MCP23S08 Class Reference

Public Member Functions
	MCP23S08 (uint8_t deviceAddr)
void	begin ()
bool	digitalReadIO (uint8_t pin)
void	digitalWriteIO (uint8_t pin, bool state)
void	pinModeIO (uint8_t pin, MCP23S08_PinModes_t mode)
void	setOutputStates (uint8_t states)
void	setPinModes (uint8_t modes)
void	enablePullups (uint8_t enables)
void	setInterruptOnChange (uint8_t mask)
void	setInterruptOnChangeDefaultCompare (uint8_t mask)
void	setInterruptControl (uint8_t mask)
void	setINTPinPushPullActiveState (bool activeLow)
uint8_t	getInputStates ()
uint8_t	getOutputStates ()
uint8_t	getPinModes ()
uint8_t	getEnabledPullups ()
uint8_t	getInterruptOnChange ()
	The GPINTEN register controls the interrupt-onchange feature for each pin.
uint8_t	getInterruptOnChangeDefaultCompare ()
	The default comparison value is configured in the DEFVAL register.
uint8_t	getInterruptControl ()
	The INTCON register controls how the associated pin value is compared for the interrupt-on-change feature.
uint8_t	getInterruptFlags ()
	The INTF register reflects the interrupt condition on the port pins of any pin that is enabled for interrupts via the GPINTEN register.
uint8_t	getInterruptCaptures ()
	The INTCAP register captures the GPIO port value at the time the interrupt occurred.

Private Member Functions
void	writeRegister (uint8_t address, uint8_t data)
uint8_t	readRegister (uint8_t address)

Private Attributes
uint8_t	deviceOpcode = 0x40

Member Function Documentation

getInterruptCaptures()

uint8_t MCP23S08::getInterruptCaptures

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The INTCAP register captures the GPIO port value at the time the interrupt occurred.

The register is �readonly� and is updated only when an interrupt occurs. The register will remain unchanged until the interrupt is cleared via a read of INTCAP or GPIO.

getInterruptControl()

uint8_t MCP23S08::getInterruptControl

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)

The INTCON register controls how the associated pin value is compared for the interrupt-on-change feature.

If a bit is set, the corresponding I/O pin is compared against the associated bit in the DEFVAL register. If a bit value is clear, the corresponding I/O pin is compared against the previous value.

getInterruptFlags()

uint8_t MCP23S08::getInterruptFlags

(

)

The INTF register reflects the interrupt condition on the port pins of any pin that is enabled for interrupts via the GPINTEN register.

A �set� bit indicates that the associated pin caused the interrupt

getInterruptOnChange()

uint8_t MCP23S08::getInterruptOnChange

(

)

The GPINTEN register controls the interrupt-onchange feature for each pin.

If a bit is set, the corresponding pin is enabled for interrupt-on-change. The DEFVAL and INTCON registers must also be configured if any pins are enabled for interrupt-on-change.

getInterruptOnChangeDefaultCompare()

uint8_t MCP23S08::getInterruptOnChangeDefaultCompare

(

)

The default comparison value is configured in the DEFVAL register.

If enabled (via GPINTEN and INTCON) to compare against the DEFVAL register, an opposite value on the associated pin will cause an interrupt to occur.

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

• /github/workspace/PS_Fgen_FW/OnOffControls/MCP23S08.h
• /github/workspace/PS_Fgen_FW/OnOffControls/MCP23S08.cpp