Add GC9A01 Driver

Makefile

@@ -53,6 +53,8 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/flash/console/qspi
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/gc9a01/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/i2c/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/uart/main.go

README.md

@@ -139,6 +139,7 @@ The following 82 devices are supported.
 | [Waveshare 2.13" e-paper display](https://www.waveshare.com/w/upload/e/e6/2.13inch_e-Paper_Datasheet.pdf)                                                                                           | SPI |
 | [Waveshare 2.9" e-paper display (V1)](https://www.waveshare.com/w/upload/e/e6/2.9inch_e-Paper_Datasheet.pdf)                                                                                           | SPI |
 | [Waveshare 4.2" e-paper B/W display](https://www.waveshare.com/w/upload/6/6a/4.2inch-e-paper-specification.pdf)                                                                                     | SPI |
+| [Waveshare GC9A01 TFT round display](https://www.waveshare.com/w/upload/5/5e/GC9A01A.pdf)                                                                             | SPI |
 | [WS2812 RGB LED](https://cdn-shop.adafruit.com/datasheets/WS2812.pdf)                                                                                                                               | GPIO |
 | [XPT2046 touch controller](http://grobotronics.com/images/datasheets/xpt2046-datasheet.pdf)                                                                                                         | GPIO |
 | [Semtech SX126x Lora](https://www.semtech.com/products/wireless-rf/lora-transceiv-ers/sx1261)                                                                                                       | SPI |

examples/gc9a01/main.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	"image/color"
+
+	"tinygo.org/x/drivers/gc9a01"
+)
+
+func main() {
+	machine.SPI0.Configure(machine.SPIConfig{
+		Frequency: 80000000,
+	})
+	display := gc9a01.New(machine.SPI0, machine.P6, machine.P7, machine.P8, machine.P9)
+	display.Configure(gc9a01.Config{Orientation: gc9a01.HORIZONTAL, Width: 240, Height: 240})
+
+	width, height := display.Size()
+
+	white := color.RGBA{255, 255, 255, 255}
+	red := color.RGBA{255, 0, 0, 255}
+	blue := color.RGBA{0, 0, 255, 255}
+	green := color.RGBA{0, 255, 0, 255}
+	black := color.RGBA{0, 0, 0, 255}
+
+	display.FillScreen(black)
+
+	display.FillRectangle(0, 0, width/2, height/2, white)
+	display.FillRectangle(width/2, 0, width/2, height/2, red)
+	display.FillRectangle(0, height/2, width/2, height/2, green)
+	display.FillRectangle(width/2, height/2, width/2, height/2, blue)
+	display.FillRectangle(width/4, height/4, width/2, height/2, black)
+
+	for {
+		time.Sleep(time.Hour)
+	}
+
+}