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Add: mt12232a lib

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This commit is contained in:
Andrey Egorov
2024-09-02 13:39:06 +03:00
parent efb2447c84
commit c6af2620e0
3 changed files with 240 additions and 187 deletions
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212
pkg/mt12864a/mt12864a.go
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@ -6,31 +6,15 @@ import (
"log"
"time"
"gitea.unprism.ru/yotia/display-test/pkg/parallel8bit"
"github.com/stianeikeland/go-rpio/v4"
)
const (
enablePrintPins = false
adressWriteTimeout = 140 * time.Nanosecond
dataStrobeTimeout = 250 * time.Nanosecond // (Data transfer)
maxWaitCycles = 100
)
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
dev parallel8bit.Device
pinE1 rpio.Pin
pinE2 rpio.Pin
pinRES rpio.Pin
@ -57,34 +41,31 @@ func New(logger *log.Logger) (Device, error) {
d := mt12864a{
logger: logger,
pinA0: rpio.Pin(18),
pinRW: rpio.Pin(17),
pinE: rpio.Pin(27),
pinDB0: rpio.Pin(22),
pinDB1: rpio.Pin(10),
pinDB2: rpio.Pin(9), // From 21
pinDB3: rpio.Pin(11),
pinDB4: rpio.Pin(12),
pinDB5: rpio.Pin(16), // From 32
pinDB6: rpio.Pin(20), // From 31
pinDB7: rpio.Pin(13), // From 33
dev: parallel8bit.New(logger, parallel8bit.DevicePins{
PinA0: rpio.Pin(18),
PinRW: rpio.Pin(17),
PinE: rpio.Pin(27),
// Reverted
// pinDB7: rpio.Pin(15),
// pinDB6: rpio.Pin(19),
// pinDB5: rpio.Pin(21),
// pinDB4: rpio.Pin(23),
// pinDB3: rpio.Pin(27),
// pinDB2: rpio.Pin(32),
// pinDB1: rpio.Pin(31),
// pinDB0: rpio.Pin(33),
PinDB0: rpio.Pin(22),
PinDB1: rpio.Pin(10),
PinDB2: rpio.Pin(9), // From 21
PinDB3: rpio.Pin(11),
PinDB4: rpio.Pin(12),
PinDB5: rpio.Pin(16), // From 32
PinDB6: rpio.Pin(20), // From 31
PinDB7: rpio.Pin(13), // From 33
}),
pinE1: rpio.Pin(19),
pinE2: rpio.Pin(26),
pinRES: rpio.Pin(21),
}
d.AllOutput()
d.pinE1.Output()
d.pinE2.Output()
d.pinRES.Output()
d.dev.Reset()
return &d, nil
}
@ -121,7 +102,6 @@ func (d *mt12864a) SetPixel(x, y byte, c bool) error {
func (d *mt12864a) PowerOn() error {
d.logger.Println(d.ReadStatus(1, 0)) // Should be 0
d.logger.Println("Reset")
d.pinE.Low()
d.pinRES.Low()
time.Sleep(time.Microsecond)
d.logger.Println(d.ReadStatus(1, 0)) // Should be 48 (power off and reset)
@ -135,7 +115,6 @@ func (d *mt12864a) PowerOn() error {
}
d.logger.Println("Power on")
d.PrintPins()
d.logger.Println("Top line to 0")
d.WriteCodeL(0xC0) // Top line to 0
d.WriteCodeR(0xC0) // Top line to 0
@ -195,29 +174,10 @@ func (d *mt12864a) writeByte(b byte, cd, l, r rpio.State) error {
if err := d.waitReady(l, r); err != nil {
return fmt.Errorf("wait ready: %w", err)
}
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)
d.dev.WriteByte(b, cd)
return nil
}
@ -228,146 +188,24 @@ func (d *mt12864a) readByte(cd, l, r rpio.State) (byte, error) {
}
// Setup
var b byte
if err := d.waitReady(l, r); err != nil {
return 0, fmt.Errorf("wait ready: %w", err)
}
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, nil
return d.dev.ReadByte(cd), nil
}
// Wait, checking status byte
func (d *mt12864a) waitReady(l, r rpio.State) error {
//d.logger.Println("Wait ready", l, r)
d.busInput() // Set bus to input
d.pinRW.High() // We read
d.pinA0.Low() // Status
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
ok := false
d.busInput() // Set bus to input
for counter := 0; counter < maxWaitCycles; counter++ {
if d.pinDB7.Read() != rpio.High {
//d.logger.Printf("BUS:%d%d%d%d%d%d%d%d\n", d.pinDB0.Read(), d.pinDB1.Read(), d.pinDB2.Read(), d.pinDB3.Read(), d.pinDB4.Read(), d.pinDB5.Read(), d.pinDB6.Read(), d.pinDB7.Read())
ok = true
break
}
}
if !ok {
return fmt.Errorf("busy timeout")
}
// Strobe end
d.pinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
// d.logger.Println("Ready")
return nil
return d.dev.WaitReady()
}
func (d *mt12864a) ReadStatus(l, r rpio.State) byte {
d.busInput() // Set bus to input
d.pinRW.High() // We read
d.pinA0.Low() // Status
d.pinE1.Write(l) // Select cristals
d.pinE2.Write(r) // Select cristals
time.Sleep(adressWriteTimeout)
// Strobe start
d.pinE.High()
time.Sleep(dataStrobeTimeout)
d.busInput()
var b byte = 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
}
func (d *mt12864a) PrintPins() {
if !enablePrintPins {
return
}
d.AllInput()
d.logger.Printf("A0:%d RW:%d E:%d BUS:%d%d%d%d%d%d%d%d E1:%d E2:%d RES:%d\n", d.pinA0.Read(), d.pinRW.Read(), d.pinE.Read(), d.pinDB0.Read(), d.pinDB1.Read(), d.pinDB2.Read(), d.pinDB3.Read(), d.pinDB4.Read(), d.pinDB5.Read(), d.pinDB6.Read(), d.pinDB7.Read(), d.pinE1.Read(), d.pinE2.Read(), d.pinRES.Read())
d.AllOutput()
}
func (d *mt12864a) AllOutput() {
d.pinA0.Output()
d.pinRW.Output()
d.pinE.Output()
d.pinE1.Output()
d.pinE2.Output()
d.pinRES.Output()
d.busOutput()
}
func (d *mt12864a) AllInput() {
d.pinA0.Input()
d.pinRW.Input()
d.pinE.Input()
d.pinE1.Input()
d.pinE2.Input()
d.pinRES.Input()
d.busInput()
}
// 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()
return d.dev.ReadByte(1)
}