go-embedded/embd
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Code Issues Releases Wiki Activity

bring in the idea of a hardware abstraction layer

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This commit is contained in:
Karan Misra 2014-02-27 04:24:53 +05:30
parent b4de382833
commit b5e2d0acc7
35 changed files with 994 additions and 971 deletions
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23
sensor/bh1750fvi/bh1750fvi.go
View file

@ -53,9 +53,6 @@ type bh1750fvi struct {
poll int
}
// Default instance for BH1750FVI sensor
var Default = New(High, i2c.Default)
// 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).
@ -149,23 +146,3 @@ func (d *bh1750fvi) Close() {
func (d *bh1750fvi) SetPollDelay(delay int) {
d.poll = delay
}
// SetPollDelay sets the delay between run of data acquisition loop.
func SetPollDelay(delay int) {
Default.SetPollDelay(delay)
}
// Lighting returns the ambient lighting in lx.
func Lighting() (lighting float64, err error) {
return Default.Lighting()
}
// Run starts continuous sensor data acquisition loop.
func Run() (err error) {
return Default.Run()
}
// Close.
func Close() {
Default.Close()
}

33
sensor/bmp085/bmp085.go
View file

@ -76,9 +76,6 @@ type bmp085 struct {
debug bool
}
// Default instance of the BMP085 sensor.
var Default = New(i2c.Default)
// New creates a new BMP085 interface. The bus variable controls
// the I2C bus used to communicate with the device.
func New(bus i2c.Bus) BMP085 {
@ -440,33 +437,3 @@ func (d *bmp085) Close() {
d.quit <- struct{}{}
}
}
// SetPollDelay sets the delay between runs of the data acquisition loop.
func SetPollDelay(delay int) {
Default.SetPollDelay(delay)
}
// Temperature returns the current temperature reading.
func Temperature() (temp float64, err error) {
return Default.Temperature()
}
// Pressure returns the current pressure reading.
func Pressure() (pressure int, err error) {
return Default.Pressure()
}
// Altitude returns the current altitude reading.
func Altitude() (altitude float64, err error) {
return Default.Altitude()
}
// Run starts the sensor data acquisition loop.
func Run() (err error) {
return Default.Run()
}
// Close.
func Close() {
Default.Close()
}

33
sensor/bmp180/bmp180.go
View file

@ -76,9 +76,6 @@ type bmp180 struct {
debug bool
}
// Default instance of the BMP180 sensor.
var Default = New(i2c.Default)
// New creates a new BMP180 interface. The bus variable controls
// the I2C bus used to communicate with the device.
func New(bus i2c.Bus) BMP180 {
@ -440,33 +437,3 @@ func (d *bmp180) Close() {
d.quit <- struct{}{}
}
}
// SetPollDelay sets the delay between runs of the data acquisition loop.
func SetPollDelay(delay int) {
Default.SetPollDelay(delay)
}
// Temperature returns the current temperature reading.
func Temperature() (temp float64, err error) {
return Default.Temperature()
}
// Pressure returns the current pressure reading.
func Pressure() (pressure int, err error) {
return Default.Pressure()
}
// Altitude returns the current altitude reading.
func Altitude() (altitude float64, err error) {
return Default.Altitude()
}
// Run starts the sensor data acquisition loop.
func Run() (err error) {
return Default.Run()
}
// Close.
func Close() {
Default.Close()
}

23
sensor/lsm303/lsm303.go
View file

@ -70,9 +70,6 @@ type lsm303 struct {
debug bool
}
// Default instance of the LSM303 sensor.
var Default = New(i2c.Default)
// New creates a new LSM303 interface. The bus variable controls
// the I2C bus used to communicate with the device.
func New(bus i2c.Bus) LSM303 {
@ -185,23 +182,3 @@ func (d *lsm303) Close() (err error) {
err = d.bus.WriteByteToReg(magAddress, magModeReg, MagSleep)
return
}
// SetPollDelay sets the delay between runs of the data acquisition loop.
func SetPollDelay(delay int) {
Default.SetPollDelay(delay)
}
// Heading returns the current heading [0, 360).
func Heading() (heading float64, err error) {
return Default.Heading()
}
// Run starts the sensor data acquisition loop.
func Run() (err error) {
return Default.Run()
}
// Close closes the sensor data acquisition loop and put the LSM303 into sleep mode.
func Close() (err error) {
return Default.Close()
}

45
sensor/us020/us020.go
View file

@ -6,7 +6,8 @@ import (
"sync"
"time"
"github.com/stianeikeland/go-rpio"
"github.com/kidoman/embd"
"github.com/kidoman/embd/gpio"
)
const (
@ -29,13 +30,10 @@ var NullThermometer = &nullThermometer{}
// US020 represents a US020 ultrasonic range finder.
type US020 struct {
EchoPinNumber, TriggerPinNumber int
EchoPin, TriggerPin gpio.DigitalPin
Thermometer Thermometer
echoPin rpio.Pin
triggerPin rpio.Pin
speedSound float64
initialized bool
@ -46,8 +44,8 @@ type US020 struct {
// New creates a new US020 interface. The bus variable controls
// the I2C bus used to communicate with the device.
func New(e, t int, thermometer Thermometer) *US020 {
return &US020{EchoPinNumber: e, TriggerPinNumber: t, Thermometer: thermometer}
func New(echoPin, triggerPin gpio.DigitalPin, thermometer Thermometer) *US020 {
return &US020{EchoPin: echoPin, TriggerPin: triggerPin, Thermometer: thermometer}
}
func (d *US020) setup() (err error) {
@ -61,11 +59,8 @@ func (d *US020) setup() (err error) {
d.mu.Lock()
defer d.mu.Unlock()
d.echoPin = rpio.Pin(d.EchoPinNumber) // ECHO port on the US020
d.triggerPin = rpio.Pin(d.TriggerPinNumber) // TRIGGER port on the US020
d.echoPin.Input()
d.triggerPin.Output()
d.TriggerPin.SetDir(embd.Out)
d.EchoPin.SetDir(embd.In)
if d.Thermometer == nil {
d.Thermometer = NullThermometer
@ -97,16 +92,24 @@ func (d *US020) Distance() (distance float64, err error) {
}
// Generate a TRIGGER pulse
d.triggerPin.High()
d.TriggerPin.Write(gpio.High)
time.Sleep(pulseDelay)
d.triggerPin.Low()
d.TriggerPin.Write(gpio.Low)
if d.Debug {
log.Print("us020: waiting for echo to go high")
}
// Wait until ECHO goes high
for d.echoPin.Read() == rpio.Low {
for {
v, err := d.EchoPin.Read()
if err != nil {
return 0, err
}
if v != embd.Low {
break
}
}
startTime := time.Now() // Record time when ECHO goes high
@ -116,7 +119,15 @@ func (d *US020) Distance() (distance float64, err error) {
}
// Wait until ECHO goes low
for d.echoPin.Read() == rpio.High {
for {
v, err := d.EchoPin.Read()
if err != nil {
return 0, err
}
if v != embd.High {
break
}
}
duration := time.Since(startTime) // Calculate time lapsed for ECHO to transition from high to low
@ -129,5 +140,5 @@ func (d *US020) Distance() (distance float64, err error) {
// Close.
func (d *US020) Close() {
d.echoPin.Output()
d.EchoPin.SetDir(embd.Out)
}