Added support for hc-sr501 PIR sensor

samples/hcsr501.go

@@ -0,0 +1,41 @@
+// +build ignore
+
+package main
+
+import (
+	"flag"
+	"log"
+	"time"
+
+	"github.com/kidoman/embd"
+
+	_ "github.com/kidoman/embd/host/chip"
+	"github.com/kidoman/embd/sensor/hcsr501"
+)
+
+func main() {
+	flag.Parse()
+
+	if err := embd.InitGPIO(); err != nil {
+		panic(err)
+	}
+	defer embd.CloseGPIO()
+
+	trig, err := embd.NewDigitalPin(132)
+	if err != nil {
+		panic(err)
+	}
+	defer trig.Close()
+
+	pir := hcsr501.New(trig)
+
+	for {
+		time.Sleep(3 * time.Second)
+		p, err := pir.Detect()
+		if err != nil {
+			log.Printf("error %v", err)
+			continue
+		}
+		log.Printf("PIR Detect %v", p)
+	}
+}