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Add: drawer, status bar, beta mt12864a support

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This commit is contained in:
Andrey Egorov
2024-08-21 19:07:29 +03:00
parent ae312a0457
commit 26edd24fef
9 changed files with 608 additions and 70 deletions
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11
display/display.go
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@ -5,15 +5,11 @@ import (
"image"
"io"
"log"
"golang.org/x/image/font"
)
type Display interface {
GetImg() *image.Gray
GetFont() font.Face
Clear() error
PutText(x, y int, text string) error
Flush(img *image.Gray) error
GetBounds() image.Rectangle
io.Closer
}
@ -22,12 +18,15 @@ type DisplayModel int
const (
SSD1306 DisplayModel = iota
MT12864A
)
func New(logger *log.Logger, model DisplayModel) (Display, error) {
switch model {
case SSD1306:
return newSsd1306(logger)
case MT12864A:
return newMt12864a(logger)
}
return nil, fmt.Errorf("invalid display model")
}

253
display/mt-12864a.go Normal file
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@ -0,0 +1,253 @@
package display
import (
"image"
"log"
"time"
"github.com/stianeikeland/go-rpio/v4"
)
const (
adressWriteTimeout = 140 * time.Nanosecond
dataStrobeTimeout = 250 * time.Nanosecond // (Data transfer)
)
type mt12864a struct {
logger *log.Logger
// GPIO pins
pinA0 rpio.Pin
pinRW rpio.Pin
pinE rpio.Pin
pinDB0 rpio.Pin
pinDB1 rpio.Pin
pinDB2 rpio.Pin
pinDB3 rpio.Pin
pinDB4 rpio.Pin
pinDB5 rpio.Pin
pinDB6 rpio.Pin
pinDB7 rpio.Pin
pinE1 rpio.Pin
pinE2 rpio.Pin
pinRES rpio.Pin
}
func newMt12864a(logger *log.Logger) (Display, error) {
rpio.Open()
d := mt12864a{
logger: logger,
pinA0: rpio.Pin(7),
pinRW: rpio.Pin(11),
pinE: rpio.Pin(13),
pinDB0: rpio.Pin(15),
pinDB1: rpio.Pin(19),
pinDB2: rpio.Pin(21),
pinDB3: rpio.Pin(23),
pinDB4: rpio.Pin(27),
pinDB5: rpio.Pin(29),
pinDB6: rpio.Pin(31),
pinDB7: rpio.Pin(33),
pinE1: rpio.Pin(35),
pinE2: rpio.Pin(37),
pinRES: rpio.Pin(40),
}
d.initLCD()
return &d, nil
}
func (d *mt12864a) GetBounds() image.Rectangle {
return image.Rectangle{}
}
func (d *mt12864a) Flush(img *image.Gray) error {
return nil
}
func (d *mt12864a) Close() error {
return rpio.Close()
}
func (d *mt12864a) initLCD() {
// Set All to output
d.pinA0.Output()
d.pinRW.Output()
d.pinE.Output()
d.pinE1.Output()
d.pinE2.Output()
d.pinRES.Output()
d.busOutput()
d.logger.Println("sdljfsldkf")
// d.pinA0.Low()
// d.logger.Println("pinA0 set low")
// d.pinRW.Low()
// d.logger.Println("pinRW set low")
// d.pinE.Low()
// d.logger.Println("pinE set low")
// d.pinDB0.Low()
// d.logger.Println("pinDB0 set low")
// d.pinDB1.Low()
// d.logger.Println("pinDB1 set low")
// d.pinDB2.Low()
// d.logger.Println("pinDB2 set low")
// d.pinDB3.Low()
// d.logger.Println("pinDB3 set low")
// d.pinDB4.Low()
// d.logger.Println("pinDB4 set low")
// d.pinDB5.Low()
// d.logger.Println("pinDB5 set low")
// d.pinDB6.Low()
// d.logger.Println("pinDB6 set low")
// d.pinDB7.Low()
// d.logger.Println("pinDB7 set low")
// d.pinE1.Low()
// d.logger.Println("pinE1 set low")
// d.pinE2.Low()
// d.logger.Println("pinE2 set low")
// d.pinRES.Low()
// d.logger.Println("pinRES set low")
// d.pinE.Low()
// d.pinRES.Low()
// time.Sleep(time.Microsecond)
// d.pinRES.High()
// time.Sleep(10 * time.Microsecond)
// d.writeCodeL(0xC0) // Top line to 0
// d.writeCodeR(0xC0)
// d.writeCodeL(0x3F) // Display on
// d.writeCodeR(0x3F)
}
func (d *mt12864a) writeCodeL(c byte) {
d.writeByte(c, 0, 1, 0)
}
func (d *mt12864a) writeCodeR(c byte) {
d.writeByte(c, 0, 0, 1)
}
func (d *mt12864a) writeDataL(b byte) {
d.writeByte(b, 1, 1, 0)
}
func (d *mt12864a) writeDataR(b byte) {
d.writeByte(b, 1, 0, 1)
}
func (d *mt12864a) readDataL() byte {
return d.readByte(1, 1, 0)
}
func (d *mt12864a) readDataR() byte {
return d.readByte(1, 0, 1)
}
func (d *mt12864a) writeByte(b byte, cd, l, r rpio.State) {
if l == rpio.High && r == rpio.High {
d.logger.Println("L and R are high!!!")
return
}
d.waitReady(l, r)
d.busOutput()
d.pinRW.Low() // We write
d.pinA0.Write(cd)
d.pinE1.Write(l) // Select cristals
d.pinE2.Write(r) // Select cristals
// Write bus
d.pinDB0.Write(rpio.State((b >> 0) & 1))
d.pinDB1.Write(rpio.State((b >> 1) & 1))
d.pinDB2.Write(rpio.State((b >> 2) & 1))
d.pinDB3.Write(rpio.State((b >> 3) & 1))
d.pinDB4.Write(rpio.State((b >> 4) & 1))
d.pinDB5.Write(rpio.State((b >> 5) & 1))
d.pinDB6.Write(rpio.State((b >> 6) & 1))
d.pinDB7.Write(rpio.State((b >> 7) & 1))
// Strobe start
d.pinE.High()
time.Sleep(dataStrobeTimeout)
// Strobe end
d.pinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
}
func (d *mt12864a) readByte(cd, l, r rpio.State) byte {
if l == rpio.High && r == rpio.High {
d.logger.Println("L and R are high!!!")
return 0
}
var b byte
d.waitReady(l, r)
d.busOutput()
d.pinRW.High() // We write
d.pinA0.Write(cd)
d.pinE1.Write(l) // Select cristals
d.pinE2.Write(r) // Select cristals
// Strobe start
d.pinE.High()
time.Sleep(dataStrobeTimeout)
// Read
b = uint8(d.pinDB0.Read()) |
(uint8(d.pinDB1.Read()) << 1) |
(uint8(d.pinDB2.Read()) << 2) |
(uint8(d.pinDB3.Read()) << 3) |
(uint8(d.pinDB4.Read()) << 4) |
(uint8(d.pinDB5.Read()) << 5) |
(uint8(d.pinDB6.Read()) << 6) |
(uint8(d.pinDB7.Read()) << 7)
// Strobe end
d.pinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
return b
}
// Wait, checking status byte
func (d *mt12864a) waitReady(l, r rpio.State) {
d.busInput() // Set bus to input
d.pinRW.High() // We read
d.pinA0.Low() // Data
d.pinE1.Write(l) // Select cristals
d.pinE2.Write(r) // Select cristals
time.Sleep(adressWriteTimeout)
// Strobe start
d.pinE.High()
time.Sleep(dataStrobeTimeout)
// Wait status flag drop
counter := 0
for d.pinDB7.Read() == rpio.High && counter < 100 {
counter++
}
// Strobe end
d.pinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
}
// Set bus pins to output
func (d *mt12864a) busOutput() {
d.pinDB0.Output()
d.pinDB1.Output()
d.pinDB2.Output()
d.pinDB3.Output()
d.pinDB4.Output()
// d.pinDB5.Output()
d.pinDB6.Output()
d.pinDB7.Output()
}
func (d *mt12864a) busInput() {
d.pinDB0.Input()
d.pinDB1.Input()
d.pinDB2.Input()
d.pinDB3.Input()
d.pinDB4.Input()
d.pinDB5.Input()
d.pinDB6.Input()
d.pinDB7.Input()
}

64
display/ssd1336.go
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@ -3,13 +3,8 @@ package display
import (
"fmt"
"image"
"image/color"
"log"
"sync"
"golang.org/x/image/font"
"golang.org/x/image/font/inconsolata"
"golang.org/x/image/math/fixed"
"periph.io/x/conn/v3/i2c"
"periph.io/x/conn/v3/i2c/i2creg"
"periph.io/x/devices/v3/ssd1306"
@ -17,13 +12,11 @@ import (
)
type displaySsd1306 struct {
mutex sync.Mutex
logger *log.Logger
font font.Face
bus i2c.BusCloser
dev *ssd1306.Dev
img *image.Gray
bus i2c.BusCloser
dev *ssd1306.Dev
img *image.Gray
}
func newSsd1306(logger *log.Logger) (Display, error) {
@ -48,65 +41,24 @@ func newSsd1306(logger *log.Logger) (Display, error) {
return nil, fmt.Errorf("create i2c: %w", err)
}
// Create image
img := image.NewGray(image.Rect(0, 0, dev.Bounds().Dx(), dev.Bounds().Dy()))
return &displaySsd1306{
logger: logger,
font: inconsolata.Regular8x16,
bus: bus,
dev: dev,
img: img,
}, nil
}
func (d *displaySsd1306) GetImg() *image.Gray {
d.mutex.Lock()
defer d.mutex.Unlock()
return d.img
func (d *displaySsd1306) GetBounds() image.Rectangle {
return d.dev.Bounds()
}
func (d *displaySsd1306) GetFont() font.Face {
return d.font
}
func (d *displaySsd1306) Clear() error {
d.mutex.Lock()
defer d.mutex.Unlock()
for i := range d.img.Pix {
d.img.Pix[i] = 0
}
return nil
}
func (d *displaySsd1306) PutText(x, y int, text string) error {
d.mutex.Lock()
defer d.mutex.Unlock()
// Create font drawer
col := color.Gray{255}
point := fixed.Point26_6{X: fixed.I(x), Y: fixed.I(y)}
drawer := &font.Drawer{
Dst: d.img,
Src: image.NewUniform(col),
Face: d.font,
Dot: point,
}
drawer.DrawString(text)
d.dev.Draw(d.img.Bounds(), d.img, image.Point{})
return nil
func (d *displaySsd1306) Flush(img *image.Gray) error {
return d.dev.Draw(img.Bounds(), d.img, image.Point{})
}
func (d *displaySsd1306) Close() error {
d.mutex.Lock()
defer d.mutex.Unlock()
if err := d.bus.Close(); err != nil {
d.logger.Println("Close i2c bus:", err.Error())
d.logger.Println("ERROR: close i2c bus:", err.Error())
}
return nil
}