ILI9341 TFT driver (SPI) (#153)

* ili9341: Add spidriver

examples/ili9341/pyportal_boing/main.go

@@ -25,15 +25,6 @@ const (
 )
 
 var (
-	display = ili9341.NewParallel(
-		machine.LCD_DATA0,
-		machine.TFT_WR,
-		machine.TFT_DC,
-		machine.TFT_CS,
-		machine.TFT_RESET,
-		machine.TFT_RD,
-	)
-
 	frameBuffer = [(graphics.BALLHEIGHT + 8) * (graphics.BALLWIDTH + 8)]uint16{}
 
 	startTime int64
@@ -56,7 +47,7 @@ var (
 func main() {
 
 	// configure backlight
-	machine.TFT_BACKLIGHT.Configure(machine.PinConfig{machine.PinOutput})
+	backlight.Configure(machine.PinConfig{machine.PinOutput})
 
 	// configure display
 	display.Configure(ili9341.Config{})
@@ -64,7 +55,7 @@ func main() {
 	width, height := display.Size()
 	println(width, height)
 
-	machine.TFT_BACKLIGHT.High()
+	backlight.High()
 
 	display.SetRotation(ili9341.Rotation270)
 	DrawBackground()

examples/ili9341/pyportal_boing/pyportal.go

@@ -0,0 +1,22 @@
+// +build pyportal
+
+package main
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/ili9341"
+)
+
+var (
+	display = ili9341.NewParallel(
+		machine.LCD_DATA0,
+		machine.TFT_WR,
+		machine.TFT_DC,
+		machine.TFT_CS,
+		machine.TFT_RESET,
+		machine.TFT_RD,
+	)
+
+	backlight = machine.TFT_BACKLIGHT
+)

examples/ili9341/pyportal_boing/wioterminal.go

@@ -0,0 +1,29 @@
+// +build wioterminal
+
+package main
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/ili9341"
+)
+
+var (
+	display = ili9341.NewSpi(
+		machine.SPI3,
+		machine.LCD_DC,
+		machine.LCD_SS_PIN,
+		machine.LCD_RESET,
+	)
+
+	backlight = machine.LCD_BACKLIGHT
+)
+
+func init() {
+	machine.SPI3.Configure(machine.SPIConfig{
+		SCK:       machine.LCD_SCK_PIN,
+		MOSI:      machine.LCD_MOSI_PIN,
+		MISO:      machine.LCD_MISO_PIN,
+		Frequency: 40000000,
+	})
+}