Init

godoor.go

@@ -0,0 +1,84 @@
+package main
+
+import "fmt"
+import "time"
+import "github.com/warthog618/gpiod"
+
+const wiegand_a = 17
+const wiegand_b = 18
+const solenoid = 21
+
+var bits [64]bool
+var card uint64 = 0
+var bitnr uint64 = 0
+
+func openDoor(l *gpiod.Line) {
+	fmt.Println("Open")
+	l.SetValue(1)
+	time.Sleep(500000000)
+	l.SetValue(0)
+	fmt.Println("Close")
+}
+
+func printCardId() {
+	fmt.Printf("%d, ", bitnr)
+	for i := 0; i < 7; i++ {
+		fmt.Printf("%02x", (card>>(8*i))&0xff)
+	}
+	fmt.Printf("\n")
+}
+
+func cardEvent() {
+	for i := 63; i != 0; i-- {
+		if bits[i] == true {
+			card |= 1 << (63 - i)
+		}
+	}
+
+	printCardId()
+
+	bitnr = 0
+	card = 0
+}
+
+func wiegandEvent(evt gpiod.LineEvent) {
+	if evt.Offset == wiegand_b {
+		bits[bitnr] = true
+		fmt.Printf("1")
+	} else {
+		bits[bitnr] = false
+		fmt.Printf("0")
+	}
+	bitnr += 1
+
+	if bitnr == 64 {
+		fmt.Printf("\n")
+		cardEvent()
+	}
+
+}
+
+func main() {
+	wa, err := gpiod.RequestLine("gpiochip0", wiegand_a, gpiod.AsInput,
+		gpiod.WithFallingEdge, gpiod.WithEventHandler(wiegandEvent))
+	if err != nil {
+		panic(err)
+	}
+	wb, err := gpiod.RequestLine("gpiochip0", wiegand_b, gpiod.AsInput,
+		gpiod.WithFallingEdge, gpiod.WithEventHandler(wiegandEvent))
+	if err != nil {
+		panic(err)
+	}
+
+	solenoid_line, err := gpiod.RequestLine("gpiochip0", solenoid, gpiod.AsOutput(0))
+	if err != nil {
+		panic(err)
+	}
+
+	openDoor(solenoid_line)
+
+	time.Sleep(time.Minute)
+	wa.Close()
+	wb.Close()
+	fmt.Println("Done")
+}