func NewNunchuck(module hwio.I2CModule) (*Nunchuck, error) {
device := module.GetDevice(DEVICE_ADDRESS)
n := &Nunchuck{device: device}
n.SetJoystickZero(DEFAULT_JOYSTICK_ZERO_X, DEFAULT_JOYSTICK_ZERO_Y)
n.SetAccelZero(DEFAULT_ACCEL_ZEROX, DEFAULT_ACCEL_ZEROY, DEFAULT_ACCEL_ZEROZ)
// instead of the common 0x40 -> 0x00 initialization, we
// use 0xF0 -> 0x55 followed by 0xFB -> 0x00.
// this lets us use 3rd party nunchucks (like cheap $4 ebay ones)
// while still letting us use official oness.
// see http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1264805255
e := device.WriteByte(0xF0, 0x55) // first config register
if e != nil {
return nil, e
}
hwio.Delay(1)
e = device.WriteByte(0xFB, 0x00) // second config register
if e != nil {
return nil, e
}
return n, nil
}
func NewHD44780Extended(module hwio.I2CModule, address int, en int, rw int, rs int, d4 int, d5 int, d6 int, d7 int, bl int, polarity int) *HD44780 {
device := module.GetDevice(address)
result := &HD44780{
device: device,
d7: 1 << uint16(d7),
d6: 1 << uint16(d6),
d5: 1 << uint16(d5),
d4: 1 << uint16(d4),
bl: 1 << uint16(bl),
en: 1 << uint16(en),
rs: 1 << uint16(rs),
rw: 1 << uint16(rw),
blPolarity: polarity}
return result
}
// Create a new isntance, and set it to use Bank 0. The address can either be what is wired on
// (A2,A1,A0) of the physical device, in which case this is added to the base address for the device
// (0x20). Otherwise, you can use 0x20-0x27. Anything else will return an error.
func NewMCP23017(module hwio.I2CModule, address int) (*MCP23017, error) {
if address < 8 {
address += DEFAULT_BASE_ADDRESS
}
if address < 0x20 || address > 0x27 {
return nil, fmt.Errorf("Device address %d is invalid for an MCP23017. It must be in the range 0x20-0x27", address)
}
device := module.GetDevice(address)
result := &MCP23017{device: device}
// set config reg, force BANK=0, SEQOP=0. Note that this only works if already in BANK0, which is default on power-up
device.WriteByte(REG_IOCON, 0)
return result, nil
}
func NewGY520(module hwio.I2CModule) *GY520 {
device := module.GetDevice(DEVICE_ADDRESS)
result := &GY520{device: device}
return result
}
// Create a new device, with i2c address specified. This can be used to access the device
// on a non-standard address, since it has an address bit.
func NewBH1750FVIAddr(module hwio.I2CModule, address int) *BH1750FVI {
device := module.GetDevice(address)
result := &BH1750FVI{device: device}
return result
}
func NewTMP102(module hwio.I2CModule) *TMP102 {
device := module.GetDevice(DEVICE_ADDRESS)
result := &TMP102{device: device}
return result
}