epd2in66b: add working driver

examples/waveshare-epd/epd2in66b/main.go

@@ -1,84 +1,74 @@
 package main
 
 import (
-	"machine"
-
 	"image/color"
-
+	"machine"
 	"time"
 
-	"tinygo.org/x/drivers/waveshare-epd/epd2in9"
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/waveshare-epd/epd2in66b"
+	"tinygo.org/x/tinyfont"
+	"tinygo.org/x/tinyfont/freemono"
 )
 
-var display epd2in9.Device
-
-const (
-	width  = 128
-	height = 296
+var (
+	black = color.RGBA{0, 0, 0, 0xff}
+	white = color.RGBA{0xff, 0xff, 0xff, 0xff}
+	red   = color.RGBA{0xff, 0, 0, 0xff}
 )
 
 func main() {
-	machine.SPI0.Configure(machine.SPIConfig{
-		Frequency: 8000000,
-		Mode:      0,
-	})
+	machine.Serial.Configure(machine.UARTConfig{})
+	time.Sleep(2 * time.Second)
 
-	display = epd2in9.New(machine.SPI0, machine.GPIO2, machine.GPIO3, machine.GPIO4, machine.GPIO5)
-	display.Configure(epd2in9.Config{
-		Width:        width,
-		LogicalWidth: width,
-		Height:       height,
+	machine.SPI1.Configure(machine.SPIConfig{
+		Frequency: epd2in66b.Baudrate,
 	})
 
-	black := color.RGBA{1, 1, 1, 255}
-	white := color.RGBA{0, 0, 0, 255}
+	println("started")
 
-	display.ClearBuffer()
-	println("Clear the display")
-	display.ClearDisplay()
-	display.WaitUntilIdle()
-	println("Waiting for 2 seconds")
-	time.Sleep(2 * time.Second)
-
-	// Show a checkered board
-	for i := int16(0); i < width/8; i++ {
-		for j := int16(0); j < height/8; j++ {
-			if (i+j)%2 == 0 {
-				showRect(i*8, j*8, 8, 8, black)
-			}
-		}
+	display := epd2in66b.New(machine.SPI1)
+	err := display.Configure(epd2in66b.Config{})
+	if err != nil {
+		panic(err)
 	}
-	println("Show checkered board")
-	display.Display()
-	display.WaitUntilIdle()
-	println("Waiting for 2 seconds")
-	time.Sleep(2 * time.Second)
 
-	println("Set partial lut")
-	display.SetLUT(false) // partial updates (faster, but with some ghosting)
-	println("Show smaller striped area")
-	for i := int16(40); i < 88; i++ {
-		for j := int16(83); j < 166; j++ {
-			if (i+j)%4 == 0 || (i+j)%4 == 1 {
-				display.SetPixel(i, j, black)
-			} else {
-				display.SetPixel(i, j, white)
-			}
-		}
+	err = display.Reset()
+	if err != nil {
+		panic(err)
 	}
 
-	display.Display()
-	display.WaitUntilIdle()
+	println("draw checkerboard")
+	drawCheckerBoard(&display)
+
+	println("draw 'hello'")
+	tinyfont.WriteLineRotated(&display, &freemono.Bold24pt7b, 40, 10, "Hello!", white, tinyfont.ROTATION_90)
+	tinyfont.WriteLineRotated(&display, &freemono.Bold12pt7b, 10, 10, "tinygo rocks", white, tinyfont.ROTATION_90)
+	err = display.Display()
+	if err != nil {
+		panic(err)
+	}
+}
 
-	display.DeepSleep()
+func drawCheckerBoard(display drivers.Displayer) {
+	s := 8
+	width, height := display.Size()
+	for x := 0; x <= int(width)-s; x += s {
+		for y := 0; y <= int(height)-s; y += s {
+			c := red
+			if (x/s)%2 == (y/s)%2 {
+				c = black
+			}
 
-	println("You could remove power now")
+			showRect(display, x, y, s, s, c)
+		}
+	}
 }
 
-func showRect(x int16, y int16, w int16, h int16, c color.RGBA) {
+func showRect(display drivers.Displayer, x int, y int, w int, h int, c color.RGBA) {
 	for i := x; i < x+w; i++ {
 		for j := y; j < y+h; j++ {
-			display.SetPixel(i, j, c)
+			display.SetPixel(int16(i), int16(j), c)
 		}
 	}
 }

smoketest.sh

@@ -80,6 +80,7 @@ tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/vl6
 tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd2in13/main.go
 tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd2in13x/main.go
 tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd4in2/main.go
+tinygo build -size short -o ./build/test.hex -target=pico ./examples/waveshare-epd/epd4in66b/main.go
 tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/ws2812
 tinygo build -size short -o ./build/test.bin -target=m5stamp-c3          ./examples/ws2812
 tinygo build -size short -o ./build/test.hex -target=feather-nrf52840 ./examples/is31fl3731/main.go