NicolSpies

pin=2

local function i2cInit()
-- init MCP23008 GPIO expander for led & pushbutton control
    i2c.setup(0,4,3,i2c.SLOW) --i2c init
    i2cWrite(0x00,0xe0) --0x00 IODIR, 0xf8 = 1110 0000 sets GPIO inputs and outputs
    i2cWrite(0x06,0xe0) --0x06 GPPU, 0xf8 = 1110 0000 sets GPIO pull up resistors
    i2cWrite(0x09,0xe0) --0x09 GPIO, 0xf8 = 1110 0000 inputs pins high, outputs pins low
    i2cWrite(0x02,0xe0) --0x02 GPINTEN, 0xe0 = 1110 0000 1=pin enable for interrupts
    i2cWrite(0x03,0xe0) --0x03 DEFVAL, 0xf8 = 1110 0000 values with no buttons pushed