host specific drivers can now be loaded separately

this ensures cleaner abstractions/code and will ensure that the produced
binary is as small as possible. a convenience package is provided to
easily load all hosts easily: "github.com/kidoman/embd/host/all"

samples/analog.go

@@ -10,6 +10,8 @@ import (
 	"time"
 
 	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/analogshort.go

@@ -7,6 +7,8 @@ import (
 	"fmt"
 
 	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/bh1750fvi.go

@@ -9,6 +9,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/sensor/bh1750fvi"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/bmp085.go

@@ -9,6 +9,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/sensor/bmp085"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/bmp180.go

@@ -9,6 +9,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/sensor/bmp180"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/gpio.go

@@ -7,6 +7,8 @@ import (
 	"time"
 
 	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/gpiodetect.go

@@ -7,6 +7,8 @@ import (
 	"time"
 
 	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/gpiodirect.go

@@ -7,6 +7,8 @@ import (
 	"time"
 
 	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/gpioshort.go

@@ -6,6 +6,8 @@ import (
 	"flag"
 
 	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/l3gd20.go

@@ -11,6 +11,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/sensor/l3gd20"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/led.go

@@ -12,6 +12,8 @@ import (
 	"time"
 
 	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/ledshort.go

@@ -9,6 +9,8 @@ import (
 	"time"
 
 	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/lsm303.go

@@ -9,6 +9,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/sensor/lsm303"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/mcp4725.go

@@ -11,6 +11,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/controller/mcp4725"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/pca9685.go

@@ -10,6 +10,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/controller/pca9685"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/pwm.go

@@ -9,6 +9,9 @@ import (
 	"time"
 
 	"github.com/kidoman/embd"
+	"github.com/kidoman/embd/host/bbb"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {
@@ -25,7 +28,7 @@ func main() {
 	}
 	defer pwm.Close()
 
-	if err := pwm.SetDuty(embd.BBBPWMDefaultPeriod / 2); err != nil {
+	if err := pwm.SetDuty(bbb.PWMDefaultPeriod / 2); err != nil {
 		panic(err)
 	}
 

samples/servo.go

@@ -11,6 +11,8 @@ import (
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/controller/pca9685"
 	"github.com/kidoman/embd/motion/servo"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/servobbb.go

@@ -10,6 +10,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/motion/servo"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/servoblaster.go

@@ -10,6 +10,8 @@ import (
 
 	"github.com/kidoman/embd/controller/servoblaster"
 	"github.com/kidoman/embd/motion/servo"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/tmp006.go

@@ -10,6 +10,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/sensor/tmp006"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/us020.go

@@ -11,6 +11,8 @@ import (
 
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/sensor/us020"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {

samples/watersensor.go

@@ -9,6 +9,8 @@ import (
 	"github.com/golang/glog"
 	"github.com/kidoman/embd"
 	"github.com/kidoman/embd/sensor/watersensor"
+
+	_ "github.com/kidoman/embd/host/all"
 )
 
 func main() {