go-embedded/embd
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simplify package structure

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This commit is contained in:
Karan Misra 2014-03-03 00:51:23 +05:30
parent 3cae4064dc
commit 36f2c0486d
41 changed files with 736 additions and 885 deletions
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61
sensor/bh1750fvi/bh1750fvi.go
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@ -6,7 +6,7 @@ import (
"sync"
"time"
"github.com/kidoman/embd/i2c"
"github.com/kidoman/embd"
)
//accuracy = sensorValue/actualValue] (min = 0.96, typ = 1.2, max = 1.44
@ -25,62 +25,42 @@ const (
pollDelay = 150
)
// A BH1750FVI interface implements access to the sensor.
type BH1750FVI interface {
// Run starts continuous sensor data acquisition loop.
Run() error
type BH1750FVI struct {
Bus embd.I2CBus
Poll int
// Lighting returns the ambient lighting in lx.
Lighting() (lighting float64, err error)
// Close.
Close()
// SetPollDelay sets the delay between run of data acquisition loop.
SetPollDelay(delay int)
}
type bh1750fvi struct {
bus i2c.Bus
mu *sync.RWMutex
mu sync.RWMutex
lightingReadings chan float64
quit chan bool
i2cAddr byte
operationCode byte
poll int
}
// Supports three modes:
// "H" -> High resolution mode (1lx), takes 120ms (recommended).
// "H2" -> High resolution mode 2 (0.5lx), takes 120ms (only use for low light).
// New creates a new BH1750FVI interface according to the mode passed.
func New(mode string, bus i2c.Bus) BH1750FVI {
func New(mode string, bus embd.I2CBus) *BH1750FVI {
switch mode {
case High:
return &bh1750fvi{bus: bus, i2cAddr: sensorI2cAddr, operationCode: highResOpCode, mu: new(sync.RWMutex)}
return &BH1750FVI{Bus: bus, i2cAddr: sensorI2cAddr, operationCode: highResOpCode, Poll: pollDelay}
case High2:
return &bh1750fvi{bus: bus, i2cAddr: sensorI2cAddr, operationCode: highResMode2OpCode, mu: new(sync.RWMutex)}
return &BH1750FVI{Bus: bus, i2cAddr: sensorI2cAddr, operationCode: highResMode2OpCode, Poll: pollDelay}
default:
return &bh1750fvi{bus: bus, i2cAddr: sensorI2cAddr, operationCode: highResOpCode, mu: new(sync.RWMutex)}
return &BH1750FVI{Bus: bus, i2cAddr: sensorI2cAddr, operationCode: highResOpCode, Poll: pollDelay}
}
}
// NewHighMode returns a BH1750FVI inteface on high resolution mode (1lx resolution)
func NewHighMode(bus i2c.Bus) BH1750FVI {
func NewHighMode(bus embd.I2CBus) *BH1750FVI {
return New(High, bus)
}
// NewHighMode returns a BH1750FVI inteface on high resolution mode2 (0.5lx resolution)
func NewHigh2Mode(bus i2c.Bus) BH1750FVI {
func NewHigh2Mode(bus embd.I2CBus) *BH1750FVI {
return New(High2, bus)
}
func (d *bh1750fvi) measureLighting() (lighting float64, err error) {
err = d.bus.WriteByte(d.i2cAddr, d.operationCode)
func (d *BH1750FVI) measureLighting() (lighting float64, err error) {
err = d.Bus.WriteByte(d.i2cAddr, d.operationCode)
if err != nil {
log.Print("bh1750fvi: Failed to initialize sensor")
return
@ -88,7 +68,7 @@ func (d *bh1750fvi) measureLighting() (lighting float64, err error) {
time.Sleep(180 * time.Millisecond)
var reading uint16
if reading, err = d.bus.ReadWordFromReg(d.i2cAddr, defReadReg); err != nil {
if reading, err = d.Bus.ReadWordFromReg(d.i2cAddr, defReadReg); err != nil {
return
}
@ -97,7 +77,7 @@ func (d *bh1750fvi) measureLighting() (lighting float64, err error) {
}
// Lighting returns the ambient lighting in lx.
func (d *bh1750fvi) Lighting() (lighting float64, err error) {
func (d *BH1750FVI) Lighting() (lighting float64, err error) {
select {
case lighting = <-d.lightingReadings:
return
@ -107,11 +87,11 @@ func (d *bh1750fvi) Lighting() (lighting float64, err error) {
}
// Run starts continuous sensor data acquisition loop.
func (d *bh1750fvi) Run() (err error) {
func (d *BH1750FVI) Run() (err error) {
go func() {
d.quit = make(chan bool)
timer := time.Tick(time.Duration(d.poll) * time.Millisecond)
timer := time.Tick(time.Duration(d.Poll) * time.Millisecond)
var lighting float64
@ -135,14 +115,9 @@ func (d *bh1750fvi) Run() (err error) {
}
// Close.
func (d *bh1750fvi) Close() {
func (d *BH1750FVI) Close() {
if d.quit != nil {
d.quit <- true
}
return
}
// SetPollDelay sets the delay between run of data acquisition loop.
func (d *bh1750fvi) SetPollDelay(delay int) {
d.poll = delay
}