pwm: update drivers with PWM to use new interface

Signed-off-by: deadprogram <ron@hybridgroup.com>

examples/l293x/speed/main.go

@@ -8,19 +8,31 @@ import (
 )
 
 const (
-	maxSpeed = 30000
+	maxSpeed = 100
 )
 
 func main() {
-	machine.InitPWM()
+	err := machine.TCC0.Configure(machine.PWMConfig{
+		Period: 16384e3, // 16.384ms
+	})
+	if err != nil {
+		println(err.Error())
+		return
+	}
 
-	wheel := l293x.NewWithSpeed(machine.D10, machine.D11, machine.PWM{machine.D12})
+	spc, err := machine.TCC0.Channel(machine.D12)
+	if err != nil {
+		println(err.Error())
+		return
+	}
+
+	wheel := l293x.NewWithSpeed(machine.D10, machine.D11, spc, machine.TCC0)
 	wheel.Configure()
 
 	for i := 0; i <= 10; i++ {
 		println("Forward")
-		var i uint16
-		for i = 0; i < maxSpeed; i += 1000 {
+		var i uint32
+		for i = 0; i < maxSpeed; i += 10 {
 			wheel.Forward(i)
 			time.Sleep(time.Millisecond * 100)
 		}
@@ -30,7 +42,7 @@ func main() {
 		time.Sleep(time.Millisecond * 1000)
 
 		println("Backward")
-		for i = 0; i < maxSpeed; i += 1000 {
+		for i = 0; i < maxSpeed; i += 10 {
 			wheel.Backward(i)
 			time.Sleep(time.Millisecond * 100)
 		}