mirror of https://github.com/periph/devices
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
474 lines
9.9 KiB
Go
474 lines
9.9 KiB
Go
package waveshare2in13v2
|
|
|
|
import (
|
|
"fmt"
|
|
"image"
|
|
"image/color"
|
|
"image/draw"
|
|
"strconv"
|
|
"time"
|
|
|
|
"periph.io/x/conn/v3"
|
|
"periph.io/x/conn/v3/display"
|
|
"periph.io/x/conn/v3/gpio"
|
|
"periph.io/x/conn/v3/physic"
|
|
"periph.io/x/conn/v3/spi"
|
|
"periph.io/x/devices/v3/ssd1306/image1bit"
|
|
"periph.io/x/host/v3/rpi"
|
|
)
|
|
|
|
// Dev defines the handler which is used to access the display.
|
|
type Dev struct {
|
|
c conn.Conn
|
|
|
|
dc gpio.PinOut
|
|
cs gpio.PinOut
|
|
rst gpio.PinOut
|
|
busy gpio.PinIO
|
|
|
|
opts *Opts
|
|
}
|
|
|
|
// LUT contains the waveform that is used to program the display.
|
|
type LUT []byte
|
|
|
|
// Opts definies the structure of the display configuration.
|
|
type Opts struct {
|
|
Width int
|
|
Height int
|
|
FullUpdate LUT
|
|
PartialUpdate LUT
|
|
}
|
|
|
|
// PartialUpdate defines if the display should do a full update or just a partial update.
|
|
type PartialUpdate bool
|
|
|
|
// errorHandler is a wrapper for error management.
|
|
type errorHandler struct {
|
|
d Dev
|
|
err error
|
|
}
|
|
|
|
const (
|
|
// Full should update the complete display.
|
|
Full PartialUpdate = false
|
|
// Partial should update only partial parts of the display.
|
|
Partial PartialUpdate = true
|
|
)
|
|
|
|
// EPD2in13v2 cointains display configuration for the Waveshare 2in13v2.
|
|
var EPD2in13v2 = Opts{
|
|
Width: 122,
|
|
Height: 250,
|
|
FullUpdate: LUT{
|
|
0x80, 0x60, 0x40, 0x00, 0x00, 0x00, 0x00,
|
|
0x10, 0x60, 0x20, 0x00, 0x00, 0x00, 0x00,
|
|
0x80, 0x60, 0x40, 0x00, 0x00, 0x00, 0x00,
|
|
0x10, 0x60, 0x20, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x03, 0x03, 0x00, 0x00, 0x02,
|
|
0x09, 0x09, 0x00, 0x00, 0x02,
|
|
0x03, 0x03, 0x00, 0x00, 0x02,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x15, 0x41, 0xA8, 0x32, 0x30, 0x0A,
|
|
},
|
|
PartialUpdate: LUT{
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x0A, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
0x15, 0x41, 0xA8, 0x32, 0x30, 0x0A,
|
|
},
|
|
}
|
|
|
|
func (eh *errorHandler) rstOut(l gpio.Level) {
|
|
if eh.err != nil {
|
|
return
|
|
}
|
|
eh.err = eh.d.rst.Out(l)
|
|
}
|
|
|
|
func (eh *errorHandler) cTx(w []byte, r []byte) {
|
|
if eh.err != nil {
|
|
return
|
|
}
|
|
eh.err = eh.d.c.Tx(w, r)
|
|
}
|
|
|
|
func (eh *errorHandler) dcOut(l gpio.Level) {
|
|
if eh.err != nil {
|
|
return
|
|
}
|
|
eh.err = eh.d.dc.Out(l)
|
|
}
|
|
|
|
func (eh *errorHandler) csOut(l gpio.Level) {
|
|
if eh.err != nil {
|
|
return
|
|
}
|
|
eh.err = eh.d.cs.Out(l)
|
|
}
|
|
|
|
func (eh *errorHandler) sendCommand(c []byte) {
|
|
if eh.err != nil {
|
|
return
|
|
}
|
|
eh.err = eh.d.sendCommand(c)
|
|
}
|
|
|
|
func (eh *errorHandler) sendData(d []byte) {
|
|
if eh.err != nil {
|
|
return
|
|
}
|
|
eh.err = eh.d.sendData(d)
|
|
}
|
|
|
|
// New creates new handler which is used to access the display.
|
|
func New(p spi.Port, dc, cs, rst gpio.PinOut, busy gpio.PinIO, opts *Opts) (*Dev, error) {
|
|
c, err := p.Connect(5*physic.MegaHertz, spi.Mode0, 8)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
d := &Dev{
|
|
c: c,
|
|
dc: dc,
|
|
cs: cs,
|
|
rst: rst,
|
|
busy: busy,
|
|
opts: opts,
|
|
}
|
|
|
|
return d, nil
|
|
}
|
|
|
|
// NewHat creates new handler which is used to access the display. Default Waveshare Hat configuration is used.
|
|
func NewHat(p spi.Port, opts *Opts) (*Dev, error) {
|
|
dc := rpi.P1_22
|
|
cs := rpi.P1_24
|
|
rst := rpi.P1_11
|
|
busy := rpi.P1_18
|
|
return New(p, dc, cs, rst, busy, opts)
|
|
}
|
|
|
|
// Init will initialize the display with the partial-update or full-update mode.
|
|
func (d *Dev) Init(partialUpdate PartialUpdate) error {
|
|
|
|
eh := errorHandler{d: *d}
|
|
|
|
// Hardware Reset
|
|
if err := d.reset(); err != nil {
|
|
return err
|
|
}
|
|
|
|
if partialUpdate {
|
|
// Partital Update Mode
|
|
|
|
// VCOM Voltage
|
|
eh.sendCommand([]byte{0x2C})
|
|
eh.sendData([]byte{0x26})
|
|
|
|
d.waitUntilIdle()
|
|
|
|
eh.sendCommand([]byte{0x32})
|
|
for i := range [70]int{} {
|
|
eh.sendData([]byte{d.opts.PartialUpdate[i]})
|
|
}
|
|
|
|
eh.sendCommand([]byte{0x37})
|
|
eh.sendData([]byte{0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00})
|
|
|
|
eh.sendCommand([]byte{0x22})
|
|
eh.sendData([]byte{0xC0})
|
|
|
|
eh.sendCommand([]byte{0x20})
|
|
|
|
d.waitUntilIdle()
|
|
|
|
// Border Waveform
|
|
eh.sendCommand([]byte{0x3C})
|
|
eh.sendData([]byte{0x01})
|
|
|
|
} else {
|
|
// Full Update Mode
|
|
|
|
// Software Reset
|
|
d.waitUntilIdle()
|
|
eh.sendCommand([]byte{0x12})
|
|
d.waitUntilIdle()
|
|
|
|
// Set analog block control
|
|
eh.sendCommand([]byte{0x74})
|
|
eh.sendData([]byte{0x54})
|
|
|
|
// Set digital block control
|
|
eh.sendCommand([]byte{0x7E})
|
|
eh.sendData([]byte{0x3B})
|
|
|
|
// Driver output control
|
|
eh.sendCommand([]byte{0x01})
|
|
eh.sendData([]byte{0xF9, 0x00, 0x00})
|
|
|
|
// Data entry mode
|
|
eh.sendCommand([]byte{0x11})
|
|
eh.sendData([]byte{0x01})
|
|
|
|
// Set Ram-X address start/end position
|
|
eh.sendCommand([]byte{0x44})
|
|
eh.sendData([]byte{0x00, 0x0F})
|
|
|
|
// Set Ram-Y address start/end position
|
|
eh.sendCommand([]byte{0x45})
|
|
eh.sendData([]byte{0xF9, 0x00, 0x00, 0x00}) //0xF9-->(249+1)=250
|
|
|
|
// Border Waveform
|
|
eh.sendCommand([]byte{0x3C})
|
|
eh.sendData([]byte{0x03})
|
|
|
|
// VCOM Voltage
|
|
eh.sendCommand([]byte{0x2C})
|
|
eh.sendData([]byte{0x55})
|
|
|
|
eh.sendCommand([]byte{0x03})
|
|
eh.sendData([]byte{d.opts.FullUpdate[70]})
|
|
|
|
eh.sendCommand([]byte{0x04})
|
|
eh.sendData([]byte{d.opts.FullUpdate[71], d.opts.FullUpdate[72], d.opts.FullUpdate[73]})
|
|
|
|
// Dummy Line
|
|
eh.sendCommand([]byte{0x3A})
|
|
eh.sendData([]byte{d.opts.FullUpdate[74]})
|
|
|
|
// Gate Time
|
|
eh.sendCommand([]byte{0x3B})
|
|
eh.sendData([]byte{d.opts.FullUpdate[75]})
|
|
|
|
eh.sendCommand([]byte{0x32})
|
|
for i := range [70]int{} {
|
|
eh.sendData([]byte{d.opts.FullUpdate[i]})
|
|
}
|
|
|
|
// Set RAM x address count to 0
|
|
eh.sendCommand([]byte{0x4E})
|
|
eh.sendData([]byte{0x00})
|
|
|
|
// Set RAM y address count to 0X127
|
|
eh.sendCommand([]byte{0x4F})
|
|
eh.sendData([]byte{0xF9, 0x00})
|
|
|
|
d.waitUntilIdle()
|
|
}
|
|
|
|
return eh.err
|
|
}
|
|
|
|
// Clear clears the display.
|
|
func (d *Dev) Clear(color byte) error {
|
|
linewidth := 0
|
|
if d.opts.Width%8 == 0 {
|
|
linewidth = d.opts.Width / 8
|
|
} else {
|
|
linewidth = d.opts.Width/8 + 1
|
|
}
|
|
if err := d.sendCommand([]byte{0x24}); err != nil {
|
|
return err
|
|
}
|
|
|
|
for i := 0; i <= d.opts.Height; i++ {
|
|
for i := 0; i <= linewidth; i++ {
|
|
if err := d.sendData([]byte{color}); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
return d.turnOnDisplay()
|
|
}
|
|
|
|
// ColorModel returns a 1Bit color model.
|
|
func (d *Dev) ColorModel() color.Model {
|
|
return image1bit.BitModel
|
|
}
|
|
|
|
// Bounds returns the bounds for the configurated display.
|
|
func (d *Dev) Bounds() image.Rectangle {
|
|
return image.Rect(0, 0, d.opts.Width, d.opts.Height)
|
|
}
|
|
|
|
// Draw draws the given image to the display.
|
|
func (d *Dev) Draw(dstRect image.Rectangle, src image.Image, srcPts image.Point) error {
|
|
next := image1bit.NewVerticalLSB(dstRect)
|
|
draw.Src.Draw(next, dstRect, src, srcPts)
|
|
|
|
var byteToSend byte = 0x00
|
|
for y := 0; y <= d.opts.Height; y++ {
|
|
if err := d.setMemoryPointer(0, y); err != nil {
|
|
return err
|
|
}
|
|
if err := d.sendCommand([]byte{0x24}); err != nil {
|
|
return err
|
|
}
|
|
for x := 0; x <= d.opts.Width; x++ {
|
|
bit := next.BitAt(x, y)
|
|
if bit {
|
|
byteToSend |= 0x80 >> (uint32(x) % 8)
|
|
}
|
|
if x%8 == 7 {
|
|
if err := d.sendData([]byte{byteToSend}); err != nil {
|
|
return err
|
|
}
|
|
byteToSend = 0x00
|
|
}
|
|
}
|
|
}
|
|
return d.turnOnDisplay()
|
|
}
|
|
|
|
// DrawPartial draws the given image to the display. Display will update only changed pixel.
|
|
func (d *Dev) DrawPartial(dstRect image.Rectangle, src image.Image, srcPts image.Point) error {
|
|
next := image1bit.NewVerticalLSB(dstRect)
|
|
draw.Src.Draw(next, dstRect, src, srcPts)
|
|
|
|
var byteToSend byte = 0x00
|
|
for y := 0; y < d.opts.Height; y++ {
|
|
if err := d.setMemoryPointer(0, y); err != nil {
|
|
return err
|
|
}
|
|
if err := d.sendCommand([]byte{0x24}); err != nil {
|
|
return err
|
|
}
|
|
for x := 0; x < d.opts.Width; x++ {
|
|
bit := next.BitAt(x, y)
|
|
if bit {
|
|
byteToSend |= 0x80 >> (uint32(x) % 8)
|
|
}
|
|
if x%8 == 7 {
|
|
if err := d.sendData([]byte{byteToSend}); err != nil {
|
|
return err
|
|
}
|
|
byteToSend = 0x00
|
|
}
|
|
}
|
|
}
|
|
|
|
byteToSend = 0x00
|
|
for y := 0; y < d.opts.Height; y++ {
|
|
if err := d.setMemoryPointer(0, y); err != nil {
|
|
return err
|
|
}
|
|
if err := d.sendCommand([]byte{0x26}); err != nil {
|
|
return err
|
|
}
|
|
for x := 0; x < d.opts.Width; x++ {
|
|
bit := next.BitAt(x, y)
|
|
if bit {
|
|
byteToSend |= 0x80 >> (uint32(x) % 8)
|
|
}
|
|
if x%8 == 7 {
|
|
if err := d.sendData([]byte{^byteToSend}); err != nil {
|
|
return err
|
|
}
|
|
byteToSend = 0x00
|
|
}
|
|
}
|
|
}
|
|
|
|
return d.turnOnDisplay()
|
|
}
|
|
|
|
// Halt clears the display.
|
|
func (d *Dev) Halt() error {
|
|
return d.Clear(0xFF)
|
|
}
|
|
|
|
// String returns a string containing configuration information.
|
|
func (d *Dev) String() string {
|
|
return fmt.Sprintf("epd.Dev{%s, %s, Height: %s, Width: %s}", d.c, d.dc, strconv.Itoa(d.opts.Height), strconv.Itoa(d.opts.Width))
|
|
}
|
|
|
|
func (d *Dev) sendData(c []byte) error {
|
|
eh := errorHandler{d: *d}
|
|
|
|
eh.dcOut(gpio.High)
|
|
eh.csOut(gpio.Low)
|
|
eh.cTx(c, nil)
|
|
eh.csOut(gpio.High)
|
|
|
|
return eh.err
|
|
}
|
|
|
|
func (d *Dev) sendCommand(c []byte) error {
|
|
eh := errorHandler{d: *d}
|
|
|
|
eh.dcOut(gpio.Low)
|
|
eh.csOut(gpio.Low)
|
|
eh.cTx(c, nil)
|
|
eh.csOut(gpio.High)
|
|
|
|
return eh.err
|
|
}
|
|
|
|
func (d *Dev) turnOnDisplay() error {
|
|
eh := errorHandler{d: *d}
|
|
|
|
eh.sendCommand([]byte{0x22})
|
|
eh.sendData([]byte{0xC7})
|
|
eh.sendCommand([]byte{0x20})
|
|
|
|
d.waitUntilIdle()
|
|
|
|
return eh.err
|
|
}
|
|
|
|
// Reset the hardware
|
|
func (d *Dev) reset() error {
|
|
eh := errorHandler{d: *d}
|
|
|
|
eh.rstOut(gpio.High)
|
|
time.Sleep(200 * time.Millisecond)
|
|
eh.rstOut(gpio.Low)
|
|
time.Sleep(200 * time.Millisecond)
|
|
eh.rstOut(gpio.High)
|
|
time.Sleep(200 * time.Millisecond)
|
|
|
|
return eh.err
|
|
|
|
}
|
|
|
|
func (d *Dev) waitUntilIdle() {
|
|
for d.busy.Read() == gpio.High {
|
|
time.Sleep(100 * time.Millisecond)
|
|
}
|
|
}
|
|
|
|
func (d *Dev) setMemoryPointer(x, y int) error {
|
|
eh := errorHandler{d: *d}
|
|
|
|
eh.sendCommand([]byte{0x4E})
|
|
eh.sendData([]byte{byte((x >> 3) & 0xFF)})
|
|
eh.sendCommand([]byte{0x4F})
|
|
eh.sendData([]byte{byte(y & 0xFF)})
|
|
eh.sendData([]byte{byte((y >> 8) & 0xFF)})
|
|
|
|
d.waitUntilIdle()
|
|
|
|
return eh.err
|
|
}
|
|
|
|
var _ display.Drawer = &Dev{}
|