ILI9341 TFT driver (SPI) (#153)

* ili9341: Add spidriver

Makefile

@@ -57,9 +57,11 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hub75/main.go
 	@md5sum ./build/test.hex
-	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/basic/main.go
+	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/basic
 	@md5sum ./build/test.hex
-	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/scroll/main.go
+	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/pyportal_boing
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/scroll
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis3dh/main.go
 	@md5sum ./build/test.hex

examples/ili9341/basic/main.go

@@ -9,15 +9,6 @@ import (
 )
 
 var (
-	display = ili9341.NewParallel(
-		machine.LCD_DATA0,
-		machine.TFT_WR,
-		machine.TFT_DC,
-		machine.TFT_CS,
-		machine.TFT_RESET,
-		machine.TFT_RD,
-	)
-
 	black = color.RGBA{0, 0, 0, 255}
 	white = color.RGBA{255, 255, 255, 255}
 	red   = color.RGBA{255, 0, 0, 255}
@@ -27,13 +18,13 @@ var (
 
 func main() {
 
-	machine.TFT_BACKLIGHT.Configure(machine.PinConfig{machine.PinOutput})
+	backlight.Configure(machine.PinConfig{machine.PinOutput})
 
 	display.Configure(ili9341.Config{})
 	width, height := display.Size()
 
 	display.FillScreen(black)
-	machine.TFT_BACKLIGHT.High()
+	backlight.High()
 
 	display.FillRectangle(0, 0, width/2, height/2, white)
 	display.FillRectangle(width/2, 0, width/2, height/2, red)

examples/ili9341/basic/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/basic/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,
+	})
+}

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,
+	})
+}

examples/ili9341/scroll/main.go

@@ -9,15 +9,6 @@ import (
 )
 
 var (
-	display = ili9341.NewParallel(
-		machine.LCD_DATA0,
-		machine.TFT_WR,
-		machine.TFT_DC,
-		machine.TFT_CS,
-		machine.TFT_RESET,
-		machine.TFT_RD,
-	)
-
 	red   = color.RGBA{255, 0, 0, 255}
 	blue  = color.RGBA{0, 0, 255, 255}
 	green = color.RGBA{0, 255, 0, 255}
@@ -27,13 +18,13 @@ var (
 
 func main() {
 
-	machine.TFT_BACKLIGHT.Configure(machine.PinConfig{machine.PinOutput})
+	backlight.Configure(machine.PinConfig{machine.PinOutput})
 
 	display.Configure(ili9341.Config{})
 	width, height := display.Size()
 
 	display.FillScreen(black)
-	machine.TFT_BACKLIGHT.High()
+	backlight.High()
 
 	display.FillRectangle(0, 0, width/2, height/2, white)
 	display.FillRectangle(width/2, 0, width/2, height/2, red)

examples/ili9341/scroll/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/scroll/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,
+	})
+}

ili9341/ili9341.go

@@ -281,15 +281,15 @@ func (d *Device) sendCommand(cmd byte, data []byte) {
 	d.dc.Low()
 	d.driver.write8(cmd)
 	d.dc.High()
-	for _, b := range data {
+	d.driver.write8sl(data)
-		d.driver.write8(b)
-	}
 	d.endWrite()
 }
 
 type driver interface {
 	configure(config *Config)
 	write8(b byte)
+	write8n(b byte, n int)
+	write8sl(b []byte)
 	write16(data uint16)
 	write16n(data uint16, n int)
 	write16sl(data []uint16)

ili9341/parallel_atsamd51.go

@@ -72,6 +72,20 @@ func (pd *parallelDriver) wrx() {
 	volatile.StoreUint32(pd.wrPortSet, pd.wrMaskSet)
 }
 
+//go:inline
+func (pd *parallelDriver) write8n(b byte, n int) {
+	for i := 0; i < n; i++ {
+		pd.write8(b)
+	}
+}
+
+//go:inline
+func (pd *parallelDriver) write8sl(b []byte) {
+	for i := 0; i < len(b); i++ {
+		pd.write8(b[i])
+	}
+}
+
 //go:inline
 func (pd *parallelDriver) write16(data uint16) {
 	pd.write8(byte(data >> 8))

ili9341/spi_atsamd51.go

@@ -0,0 +1,116 @@
+// +build atsamd51
+
+package ili9341
+
+import (
+	"device/sam"
+	"machine"
+)
+
+type spiDriver struct {
+	bus machine.SPI
+}
+
+func NewSpi(bus machine.SPI, dc, cs, rst machine.Pin) *Device {
+	return &Device{
+		dc:  dc,
+		cs:  cs,
+		rst: rst,
+		rd:  machine.NoPin,
+		driver: &spiDriver{
+			bus: bus,
+		},
+	}
+}
+
+func (pd *spiDriver) configure(config *Config) {
+}
+
+func (pd *spiDriver) write8(b byte) {
+	pd.bus.Bus.CTRLB.ClearBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+
+	for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+	}
+	pd.bus.Bus.DATA.Set(uint32(b))
+
+	pd.bus.Bus.CTRLB.SetBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+	for pd.bus.Bus.SYNCBUSY.HasBits(sam.SERCOM_SPIM_SYNCBUSY_CTRLB) {
+	}
+}
+
+func (pd *spiDriver) write8n(b byte, n int) {
+	pd.bus.Bus.CTRLB.ClearBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+
+	for i, c := 0, n; i < c; i++ {
+		for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+		}
+		pd.bus.Bus.DATA.Set(uint32(b))
+	}
+
+	pd.bus.Bus.CTRLB.SetBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+	for pd.bus.Bus.SYNCBUSY.HasBits(sam.SERCOM_SPIM_SYNCBUSY_CTRLB) {
+	}
+}
+
+func (pd *spiDriver) write8sl(b []byte) {
+	pd.bus.Bus.CTRLB.ClearBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+
+	for i, c := 0, len(b); i < c; i++ {
+		for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+		}
+		pd.bus.Bus.DATA.Set(uint32(b[i]))
+	}
+
+	pd.bus.Bus.CTRLB.SetBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+	for pd.bus.Bus.SYNCBUSY.HasBits(sam.SERCOM_SPIM_SYNCBUSY_CTRLB) {
+	}
+}
+
+func (pd *spiDriver) write16(data uint16) {
+	pd.bus.Bus.CTRLB.ClearBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+
+	for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+	}
+	pd.bus.Bus.DATA.Set(uint32(uint8(data >> 8)))
+	for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+	}
+	pd.bus.Bus.DATA.Set(uint32(uint8(data)))
+
+	pd.bus.Bus.CTRLB.SetBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+	for pd.bus.Bus.SYNCBUSY.HasBits(sam.SERCOM_SPIM_SYNCBUSY_CTRLB) {
+	}
+}
+
+func (pd *spiDriver) write16n(data uint16, n int) {
+	pd.bus.Bus.CTRLB.ClearBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+
+	for i := 0; i < n; i++ {
+		for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+		}
+		pd.bus.Bus.DATA.Set(uint32(uint8(data >> 8)))
+		for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+		}
+		pd.bus.Bus.DATA.Set(uint32(uint8(data)))
+	}
+
+	pd.bus.Bus.CTRLB.SetBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+	for pd.bus.Bus.SYNCBUSY.HasBits(sam.SERCOM_SPIM_SYNCBUSY_CTRLB) {
+	}
+}
+
+func (pd *spiDriver) write16sl(data []uint16) {
+	pd.bus.Bus.CTRLB.ClearBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+
+	for i, c := 0, len(data); i < c; i++ {
+		for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+		}
+		pd.bus.Bus.DATA.Set(uint32(uint8(data[i] >> 8)))
+		for !pd.bus.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
+		}
+		pd.bus.Bus.DATA.Set(uint32(uint8(data[i])))
+	}
+
+	pd.bus.Bus.CTRLB.SetBits(sam.SERCOM_SPIM_CTRLB_RXEN)
+	for pd.bus.Bus.SYNCBUSY.HasBits(sam.SERCOM_SPIM_SYNCBUSY_CTRLB) {
+	}
+}