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Add: beta working mt12232a display

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This commit is contained in:
Andrey Egorov
2024-09-04 21:05:02 +03:00
parent c6af2620e0
commit 7e41196dce
5 changed files with 345 additions and 105 deletions
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115
pkg/mt12232a/mt12232a.go
View File

@ -21,12 +21,13 @@ type mt12232a struct {
type Device interface {
PowerOn() error
SetPixel(x, y byte, c bool) error
WriteCodeL(c byte) error
WriteCodeR(c byte) error
WriteDataL(b byte) error
WriteDataR(b byte) error
WriteDatasL(b []byte) error
WriteDatasR(b []byte) error
ReadDataL() (byte, error)
ReadDataR() (byte, error)
@ -42,23 +43,22 @@ func New(logger *log.Logger) (Device, error) {
logger: logger,
dev: parallel8bit.New(logger, parallel8bit.DevicePins{
PinA0: rpio.Pin(18),
PinRW: rpio.Pin(17),
PinE: rpio.Pin(27),
PinA0: rpio.Pin(19),
PinRW: rpio.Pin(13),
PinE: rpio.Pin(12),
PinDB0: rpio.Pin(22),
PinDB1: rpio.Pin(10),
PinDB2: rpio.Pin(9), // From 21
PinDB2: rpio.Pin(9),
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
PinDB4: rpio.Pin(21),
PinDB5: rpio.Pin(20),
PinDB6: rpio.Pin(26),
PinDB7: rpio.Pin(16),
}),
pinCS: rpio.Pin(19),
pinRES: rpio.Pin(21),
pinCS: rpio.Pin(17),
pinRES: rpio.Pin(27),
}
d.pinCS.Output()
d.pinRES.Output()
@ -71,47 +71,37 @@ func (d *mt12232a) Close() error {
return rpio.Close()
}
func (d *mt12232a) SetPixel(x, y byte, c bool) error {
// var c8 byte
// var mask byte
// Check bounds
if x > 127 || y > 63 {
return fmt.Errorf("positions out of bounds")
}
if x < 64 { // Left crystal
d.WriteCodeL(0xB8 | (y >> 3)) // Set page
d.WriteCodeL(0x40 | x) // Set addr
// c8=ReadDataL(); // ?? ok
// c8=ReadDataL(); // Read byte
// m8=1<<(y&0x07);//Вычислить маску нужного бита в байте
// if (c==1) //Зажигать точку?
// c8|=m8//Установить нужный бит в байте
// else //Или гасить точку?
// c8&=~m8;//Сбросить нужный бит в байте
// WriteCodeL(0x40|x);//Снова установить адрес нужного байта
d.WriteDataL(0x34) // Write byte
}
return nil
func (d *mt12232a) status() {
d.logger.Println("STATUS:", d.ReadStatus(0)&0xF0, d.ReadStatus(1)&0xF0)
}
func (d *mt12232a) PowerOn() error {
d.status()
d.logger.Println(d.ReadStatus(0)) // Should be 0
d.logger.Println("Reset")
d.status()
d.pinRES.Low()
time.Sleep(time.Microsecond)
d.logger.Println(d.ReadStatus(0)) // Should be 48 (power off and reset)
d.pinRES.High()
time.Sleep(10 * time.Microsecond)
time.Sleep(4 * time.Millisecond)
d.logger.Println(d.ReadStatus(0)) // Should be 32 (power off)
// Module is reset and should be turned off
if d.ReadStatus(0) == 0 || d.ReadStatus(1) == 0 {
return fmt.Errorf("no response from display(or it is possible that it is turned on but...)")
}
for i := 0; i < 100; i++ {
if ((d.ReadStatus(0) >> 4) & 1) == 0 {
break
}
}
d.status()
d.status()
d.status()
d.logger.Println("Power on")
d.status()
d.WriteCodeL(0xE2) // Reset
d.WriteCodeR(0xE2) // Reset
d.WriteCodeL(0xEE) // ReadModifyWrite off
@ -125,15 +115,45 @@ func (d *mt12232a) PowerOn() error {
d.WriteCodeL(0xA1) // Invert scan RAM
d.WriteCodeR(0xA0) // NonInvert scan RAM
d.status()
d.logger.Println("Display on")
d.WriteCodeL(0xAF) // Display on
d.WriteCodeR(0xAF) // Display on
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
d.status()
time.Sleep(100 * time.Millisecond)
// Check that crystals are turned on
if (d.ReadStatus(0) & (1 << 5)) != 0 {
if ((d.ReadStatus(0) >> 5) & 1) == 1 {
d.logger.Println("Left cristal is still off")
}
if ((d.ReadStatus(0) >> 5) & 1) == 1 {
d.logger.Println("Right cristal is still off")
}
// The same but with error
if ((d.ReadStatus(0) >> 5) & 1) == 1 {
return fmt.Errorf("Left cristal is still off")
}
if (d.ReadStatus(1) & (1 << 5)) != 0 {
if ((d.ReadStatus(0) >> 5) & 1) == 1 {
return fmt.Errorf("Right cristal is still off")
}
@ -160,6 +180,14 @@ func (d *mt12232a) WriteDataR(b byte) error {
return d.writeByte(b, 1, 1)
}
func (d *mt12232a) WriteDatasL(b []byte) error {
return d.writeBytes(b, 1, 0)
}
func (d *mt12232a) WriteDatasR(b []byte) error {
return d.writeBytes(b, 1, 1)
}
// Read data
func (d *mt12232a) ReadDataL() (byte, error) {
@ -173,7 +201,6 @@ func (d *mt12232a) ReadDataR() (byte, error) {
// Low level functions
func (d *mt12232a) writeByte(b byte, cd, cs rpio.State) error {
// d.logger.Println("Write byte", b, cd, l, r)
if err := d.waitReady(cs); err != nil {
return fmt.Errorf("wait ready: %w", err)
}
@ -183,6 +210,16 @@ func (d *mt12232a) writeByte(b byte, cd, cs rpio.State) error {
return nil
}
func (d *mt12232a) writeBytes(b []byte, cd, cs rpio.State) error {
if err := d.waitReady(cs); err != nil {
return fmt.Errorf("wait ready: %w", err)
}
d.pinCS.Write(cs) // Select cristals
d.dev.WriteBytes(b, cd)
return nil
}
func (d *mt12232a) readByte(cd, cs rpio.State) (byte, error) {
// Setup
if err := d.waitReady(cs); err != nil {

41
pkg/parallel8bit/parallel8bit.go
View File

@ -18,8 +18,11 @@ const (
type Device interface {
Reset()
WriteByte(b byte, cd rpio.State)
WriteBytes(b []byte, cd rpio.State)
ReadByte(cd rpio.State) byte
Pins() DevicePins
WaitReady() error
}
@ -44,6 +47,7 @@ type DevicePins struct {
type device struct {
logger *log.Logger
isBusOutput bool
DevicePins
}
@ -54,6 +58,10 @@ func New(logger *log.Logger, pins DevicePins) Device {
}
}
func (d *device) Pins() DevicePins {
return d.DevicePins
}
func (d *device) Reset() {
d.PinA0.Output()
d.PinRW.Output()
@ -88,6 +96,31 @@ func (d *device) WriteByte(b byte, cd rpio.State) {
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
}
func (d *device) WriteBytes(b []byte, cd rpio.State) {
// d.logger.Println("Write byte", b, cd, l, r)
d.busOutput()
d.PinRW.Low() // We write
d.PinA0.Write(cd)
// Write bus
d.PinDB0.Write(rpio.State(b[0]))
d.PinDB1.Write(rpio.State(b[1]))
d.PinDB2.Write(rpio.State(b[2]))
d.PinDB3.Write(rpio.State(b[3]))
d.PinDB4.Write(rpio.State(b[4]))
d.PinDB5.Write(rpio.State(b[5]))
d.PinDB6.Write(rpio.State(b[6]))
d.PinDB7.Write(rpio.State(b[7]))
// Strobe start
d.PinE.High()
time.Sleep(dataStrobeTimeout)
// Strobe end
d.PinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
}
func (d *device) ReadByte(cd rpio.State) byte {
// Setup
var b byte
@ -148,6 +181,9 @@ func (d *device) WaitReady() error {
// Set bus pins to output
func (d *device) busOutput() {
// if d.isBusOutput {
// return
// }
d.PinDB0.Output()
d.PinDB1.Output()
d.PinDB2.Output()
@ -156,9 +192,13 @@ func (d *device) busOutput() {
d.PinDB5.Output()
d.PinDB6.Output()
d.PinDB7.Output()
d.isBusOutput = true
}
func (d *device) busInput() {
//if !d.isBusOutput {
// return
//}
d.PinDB0.Input()
d.PinDB1.Input()
d.PinDB2.Input()
@ -167,4 +207,5 @@ func (d *device) busInput() {
d.PinDB5.Input()
d.PinDB6.Input()
d.PinDB7.Input()
d.isBusOutput = false
}