readGPIO()

bool readGPIO	(	int	gpio,
		uint8_t	hwAddr = 0
	)

Reads input status of a pin.

Parameters

gpio	Pin to read input value (MCP_A0...MCP_A7 and MCP_B0...MCP_B7)
hwAddr	Optional hardware device address

Returns

Read input value (false = low, true = high)

Example:

bool A3 = io.readGPIO(MCP_A3);

Examples

VGA/HardwareTest/HardwareTest.ino.

Definition at line 282 of file MCP23S17.cpp.