// I2cStart initializes i2c device for addresss
func (e *EdisonAdaptor) I2cStart(address byte) (err error) {
if err = e.tristate.Write(sysfs.LOW); err != nil {
return
}
for _, i := range []int{14, 165, 212, 213} {
io := sysfs.NewDigitalPin(i)
if err = io.Export(); err != nil {
return
}
if err = io.Direction(sysfs.IN); err != nil {
return
}
if err = io.Unexport(); err != nil {
return
}
}
for _, i := range []int{236, 237, 204, 205} {
io := sysfs.NewDigitalPin(i)
if err = io.Export(); err != nil {
return
}
if err = io.Direction(sysfs.OUT); err != nil {
return
}
if err = io.Write(sysfs.LOW); err != nil {
return
}
if err = io.Unexport(); err != nil {
return
}
}
for _, i := range []string{"28", "27"} {
if err = changePinMode(i, "1"); err != nil {
return
}
}
if err = e.tristate.Write(sysfs.HIGH); err != nil {
return
}
e.i2cDevice, err = sysfs.NewI2cDevice("/dev/i2c-6", address)
return
}
// NewEdisonAdaptor returns a new EdisonAdaptor with specified name
func NewEdisonAdaptor(name string) *EdisonAdaptor {
return &EdisonAdaptor{
name: name,
connect: func(e *EdisonAdaptor) (err error) {
e.tristate = sysfs.NewDigitalPin(214)
if err = e.tristate.Export(); err != nil {
return err
}
if err = e.tristate.Direction(sysfs.OUT); err != nil {
return err
}
if err = e.tristate.Write(sysfs.LOW); err != nil {
return err
}
for _, i := range []int{263, 262} {
io := sysfs.NewDigitalPin(i)
if err = io.Export(); err != nil {
return err
}
if err = io.Direction(sysfs.OUT); err != nil {
return err
}
if err = io.Write(sysfs.HIGH); err != nil {
return err
}
if err = io.Unexport(); err != nil {
return err
}
}
for _, i := range []int{240, 241, 242, 243} {
io := sysfs.NewDigitalPin(i)
if err = io.Export(); err != nil {
return err
}
if err = io.Direction(sysfs.OUT); err != nil {
return err
}
if err = io.Write(sysfs.LOW); err != nil {
return err
}
if err = io.Unexport(); err != nil {
return err
}
}
for _, i := range []string{"111", "115", "114", "109"} {
if err = changePinMode(i, "1"); err != nil {
return err
}
}
for _, i := range []string{"131", "129", "40"} {
if err = changePinMode(i, "0"); err != nil {
return err
}
}
err = e.tristate.Write(sysfs.HIGH)
return
},
}
}