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

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

st7735/st7735.go

@@ -5,7 +5,6 @@ package st7735 // import "tinygo.org/x/drivers/st7735"
 
 import (
 	"image/color"
-	"machine"
 	"time"
 
 	"errors"
@@ -39,10 +38,10 @@ type Device = DeviceOf[pixel.RGB565BE]
 // formats.
 type DeviceOf[T Color] struct {
 	bus          drivers.SPI
-	dcPin        machine.Pin
-	resetPin     machine.Pin
-	csPin        machine.Pin
-	blPin        machine.Pin
+	dcPin        drivers.Pin
+	resetPin     drivers.Pin
+	csPin        drivers.Pin
+	blPin        drivers.Pin
 	width        int16
 	height       int16
 	columnOffset int16
@@ -65,17 +64,13 @@ type Config struct {
 }
 
 // New creates a new ST7735 connection. The SPI wire must already be configured.
-func New(bus drivers.SPI, resetPin, dcPin, csPin, blPin machine.Pin) Device {
+func New(bus drivers.SPI, resetPin, dcPin, csPin, blPin drivers.Pin) Device {
 	return NewOf[pixel.RGB565BE](bus, resetPin, dcPin, csPin, blPin)
 }
 
 // NewOf creates a new ST7735 connection with a particular pixel format. The SPI
-// wire must already be configured.
-func NewOf[T Color](bus drivers.SPI, resetPin, dcPin, csPin, blPin machine.Pin) DeviceOf[T] {
-	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	resetPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	blPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+// wire and pins must already be configured.
+func NewOf[T Color](bus drivers.SPI, resetPin, dcPin, csPin, blPin drivers.Pin) DeviceOf[T] {
 	return DeviceOf[T]{
 		bus:      bus,
 		dcPin:    dcPin,