Class daisy::Mcp23X17

template <typename Transport>

ClassList > daisy > Mcp23X17

Classes

Type	Name
struct	Config

Public Functions

Type	Name
uint8_t	GetPin (uint8_t id) Fetches pin state from the result of recent Read() call. Useful to preserve unneeded reads.
void	Init ()
void	Init (const Config & config)
void	PinMode (uint8_t pin, MCPMode mode, bool inverted)
void	PortMode (MCPPort port, uint8_t directions, uint8_t pullups=0xFF, uint8_t inverted=0x00)
uint16_t	Read ()
uint8_t	ReadPin (uint8_t pin)
uint8_t	ReadPort (MCPPort port)
void	Write (uint16_t value)
void	WritePin (uint8_t pin, uint8_t state)
void	WritePort (MCPPort port, uint8_t value)

Public Functions Documentation

function GetPin

Fetches pin state from the result of recent Read() call. Useful to preserve unneeded reads.

inline uint8_t daisy::Mcp23X17::GetPin (
    uint8_t id
) 

Parameters:

• id pin ID

Returns:

uint8_t pin state: 0x00 or 0xFF

---

function Init [½]

inline void daisy::Mcp23X17::Init () 

---

function Init [2/2]

inline void daisy::Mcp23X17::Init (
    const  Config & config
) 

---

function PinMode

inline void daisy::Mcp23X17::PinMode (
    uint8_t pin,
    MCPMode mode,
    bool inverted
) 

Controls a single pin direction. Pin 0-7 for port A, 8-15 fo port B.

1 = Pin is configured as an input. 0 = Pin is configured as an output.

See "3.5.1 I/O Direction register".

---

function PortMode

inline void daisy::Mcp23X17::PortMode (
    MCPPort port,
    uint8_t directions,
    uint8_t pullups=0xFF,
    uint8_t inverted=0x00
) 

Controls the pins direction on a whole port at once.

directions: 0 - output, 1 - input pullups: 0 - disabled, 1 - enabled inverted: 0 - false/normal, 1 - true/inverted

See "3.5.1 I/O Direction register".

---

function Read

inline uint16_t daisy::Mcp23X17::Read () 

Reads pins state for both ports.

1 = Logic-high 0 = Logic-low

See "3.5.10 Port register".

---

function ReadPin

inline uint8_t daisy::Mcp23X17::ReadPin (
    uint8_t pin
) 

Reads a single pin state. Pin 0-7 for port A, 8-15 for port B.

1 = Logic-high 0 = Logic-low

See "3.5.10 Port register".

---

function ReadPort

inline uint8_t daisy::Mcp23X17::ReadPort (
    MCPPort port
) 

Reads pins state for a whole port.

1 = Logic-high 0 = Logic-low

See "3.5.10 Port register".

---

function Write

inline void daisy::Mcp23X17::Write (
    uint16_t value
) 

Writes pins state to both ports.

1 = Logic-high 0 = Logic-low

See "3.5.10 Port register".

---

function WritePin

inline void daisy::Mcp23X17::WritePin (
    uint8_t pin,
    uint8_t state
) 

Writes a single pin state. Pin 0-7 for port A, 8-15 for port B.

1 = Logic-high 0 = Logic-low

See "3.5.10 Port register".

---

function WritePort

inline void daisy::Mcp23X17::WritePort (
    MCPPort port,
    uint8_t value
) 

Writes pins state to a whole port.

1 = Logic-high 0 = Logic-low

See "3.5.10 Port register".

---

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The documentation for this class was generated from the following file external-docs/libDaisy/src/dev/mcp23x17.h