readPort() [2/2]

void readPort	(	int	port,
		void *	buffer,
		size_t	length,
		uint8_t	hwAddr = 0
	)

High speed reads en entire buffer from a specific port.

Parameters

port	Source port (MCP_PORTA or MCP_PORTB)
buffer	Pointer to the destination buffer
length	Buffer length (max 4092 bytes)
hwAddr	Optional hardware device address

Example:

// performs 256 reads from port A
uint8_t buf[256];
io.readPort(MCP_PORTA, buf, 256);

Definition at line 339 of file MCP23S17.cpp.