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This commit is contained in:
Ryan Cox 2015-08-25 21:03:19 -07:00
parent b26f74efe8
commit 578a009880
2 changed files with 12 additions and 3 deletions
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1
samples/isl29125.go
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@ -22,7 +22,6 @@ func main() {
isl := isl29125.New(isl29125.DefaultConfig, bus) isl := isl29125.New(isl29125.DefaultConfig, bus)
defer isl.Close() defer isl.Close()
isl.Init()
for { for {
r, err := isl.Reading() r, err := isl.Reading()

12
sensor/isl29125/isl29125.go
View File

@ -113,6 +113,7 @@ type ISL29125 struct {
quit chan bool quit chan bool
mode uint8 mode uint8
initialized bool
} }
// New returns an ISL29125 for a given config. // New returns an ISL29125 for a given config.
@ -121,7 +122,12 @@ func New(config uint8, bus embd.I2CBus) *ISL29125 {
return &ISL29125{Bus: bus, Poll: pollDelay, mode: config} return &ISL29125{Bus: bus, Poll: pollDelay, mode: config}
} }
func (i *ISL29125) Init() error { // Setup initializes the sensor.
func (i *ISL29125) setup() error {
if i.initialized {
return nil
}
// verify that i2c device is reachable on specified bus and that it reports back the correct ID // verify that i2c device is reachable on specified bus and that it reports back the correct ID
id, err := i.Bus.ReadByteFromReg(SensorAddr, RegisterDeviceID) id, err := i.Bus.ReadByteFromReg(SensorAddr, RegisterDeviceID)
@ -169,11 +175,15 @@ func (i *ISL29125) Init() error {
return err return err
} }
i.initialized = true
return nil return nil
} }
func (i *ISL29125) getReading() (*Reading, error) { func (i *ISL29125) getReading() (*Reading, error) {
if err := i.setup(); err != nil {
return nil, err
}
glog.V(1).Info("Getting reading") glog.V(1).Info("Getting reading")
red, err := i.Bus.ReadWordFromReg(SensorAddr, RegisterRedLow) red, err := i.Bus.ReadWordFromReg(SensorAddr, RegisterRedLow)