refactor: add display.Pin interface and use it everywhere that is easy to do so

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

waveshare-epd/epd2in13x/epd2in13x.go

@@ -6,7 +6,6 @@ package epd2in13x // import "tinygo.org/x/drivers/waveshare-epd/epd2in13x"
 import (
 	"errors"
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
@@ -20,10 +19,10 @@ type Config struct {
 
 type Device struct {
 	bus          drivers.SPI
-	cs           machine.Pin
-	dc           machine.Pin
-	rst          machine.Pin
-	busy         machine.Pin
+	cs           drivers.Pin
+	dc           drivers.Pin
+	rst          drivers.Pin
+	busy         drivers.Pin
 	width        int16
 	height       int16
 	buffer       [][]uint8
@@ -32,12 +31,9 @@ type Device struct {
 
 type Color uint8
 
-// New returns a new epd2in13x driver. Pass in a fully configured SPI bus.
-func New(bus drivers.SPI, csPin, dcPin, rstPin, busyPin machine.Pin) Device {
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	busyPin.Configure(machine.PinConfig{Mode: machine.PinInput})
+// New returns a new epd2in13x driver. Pass in a fully configured SPI bus and pins.
+// Busy pin should input, the rest should be output.
+func New(bus drivers.SPI, csPin, dcPin, rstPin, busyPin drivers.Pin) Device {
 	return Device{
 		bus:  bus,
 		cs:   csPin,