panel

package

v0.2.0 Latest Latest Go to latest Published: Oct 7, 2026 License: MIT Imports: 4 Imported by: 0

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Valid go.mod file
Redistributable license
Tagged version
Stable version
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Repository

github.com/RevoTale/esp32-e-paper-manager

Links

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Documentation ¶

Index ¶

Constants
Variables
func ErrorCode(err error) string
type Adapter
- func NewAdapter(driver *Driver) (*Adapter, error)
- func (a *Adapter) Capabilities() display.Capabilities
- func (a *Adapter) Refresh(frame display.Frame, mode display.RefreshMode) error
- func (a *Adapter) Sleep() error
type Driver
- func New(io IO) (*Driver, error)
- func (d *Driver) Refresh(frame []byte) error
type Event
type EventKind
- func (k EventKind) String() string
type IO
type OpError
- func (e OpError) Error() string
- func (e OpError) Unwrap() error
type Phase
- func (p Phase) String() string
type Step
- func (s Step) String() string
type Stream
- func NewStream(driver *Driver) (*Stream, error)
- func (s *Stream) Abort() error
- func (s *Stream) Begin() error
- func (s *Stream) Commit() error
- func (s *Stream) Write(pass uint8, offset uint32, pixels []byte) error

Constants ¶

View Source

const (
	FrameWidth  = 800
	FrameHeight = 480
	FrameBytes  = FrameWidth * FrameHeight / 8
)

Variables ¶

View Source

var (
	ErrFrameSize   = errors.New("panel: wrong frame size")
	ErrConfig      = errors.New("panel: invalid IO configuration")
	ErrInUse       = errors.New("panel: driver is already in use")
	ErrBusyTimeout = errors.New("panel: BUSY remained LOW until deadline")
)

View Source

var ErrStreamState = errors.New("panel: stream state or bounds")

Functions ¶

func ErrorCode ¶

func ErrorCode(err error) string

Types ¶

type Adapter ¶

type Adapter struct {
	// contains filtered or unexported fields
}

Adapter exposes the verified 7.5-inch sequence through the generic display contract.

func NewAdapter ¶

func NewAdapter(driver *Driver) (*Adapter, error)

func (*Adapter) Capabilities ¶

func (a *Adapter) Capabilities() display.Capabilities

func (*Adapter) Refresh ¶

func (a *Adapter) Refresh(frame display.Frame, mode display.RefreshMode) error

func (*Adapter) Sleep ¶

func (a *Adapter) Sleep() error

Sleep is idempotent; Driver.Refresh already powers off and enters deep sleep.

type Driver ¶

type Driver struct {
	// contains filtered or unexported fields
}

func New ¶

func New(io IO) (*Driver, error)

func (*Driver) Refresh ¶

func (d *Driver) Refresh(frame []byte) error

Refresh performs the Waveshare 7.5-inch V2 full-refresh and deep-sleep sequence. Source: https://github.com/waveshareteam/Pico_ePaper_Code/blob/main/c/lib/e-Paper/EPD_7in5_V2.c

type Event ¶

type Event struct {
	Kind       EventKind
	Phase      Phase
	Step       Step
	Command    byte
	Offset     int
	Bytes      uint32
	Busy       bool
	BusyKnown  bool
	Samples    uint32
	LowSamples uint32
}

type EventKind ¶

type EventKind uint8

const (
	EventStep EventKind = iota + 1
	EventCommand
	EventTransferStart
	EventTransferProgress
	EventTransferDone
	EventBusyWait
	EventBusyDone
	EventComplete
)

func (EventKind) String ¶

func (k EventKind) String() string

type IO ¶

type IO struct {
	Write    func([]byte) error
	SetCS    func(high bool)
	SetDC    func(high bool)
	SetReset func(high bool)
	SetPower func(high bool)
	ReadBusy func() bool
	Delay    func(time.Duration)
	Observe  func(Event)
}

type OpError ¶

type OpError struct {
	Phase     Phase
	Step      Step
	Command   byte
	Offset    int
	Busy      bool
	BusyKnown bool
	Cause     error
}

func (OpError) Error ¶

func (e OpError) Error() string

func (OpError) Unwrap ¶

func (e OpError) Unwrap() error

type Phase ¶

type Phase uint8

const (
	PhaseInitialize Phase = iota + 1
	PhasePowerOn
	PhaseOldPlane
	PhaseNewPlane
	PhaseRefresh
	PhasePowerOff
)

func (Phase) String ¶

func (p Phase) String() string

type Step ¶

type Step uint8

const (
	StepPowerOff Step = iota + 1
	StepPowerOn
	StepReset
	StepPowerSettings
	StepBoosterSoftStart
	StepControllerPowerOn
	StepPanelSettings
	StepResolution
	StepDualSPI
	StepVCOM
	StepTCON
	StepOldPlane
	StepNewPlane
	StepDisplayRefresh
	StepVCOMOff
	StepControllerPowerOff
	StepDeepSleep
)

func (Step) String ¶

func (s Step) String() string

type Stream ¶

type Stream struct {
	// contains filtered or unexported fields
}

Stream is an experimental single-owner two-pass full-refresh sink. The caller verifies both passes before Commit and enforces refresh cadence. It must Abort on invalid input, disconnect or idle timeout. Only the 100-byte inversion row is retained. No partial writes/refreshes or plane-pointer resumption is assumed. Sequence source: https://github.com/waveshareteam/Pico_ePaper_Code/blob/c9bcd84db5adf5f085353649a8a5c31492bc5fb8/c/lib/e-Paper/EPD_7in5_V2.c

func NewStream ¶

func NewStream(driver *Driver) (*Stream, error)

func (*Stream) Abort ¶

func (s *Stream) Abort() error

func (*Stream) Begin ¶

func (s *Stream) Begin() error

func (*Stream) Commit ¶

func (s *Stream) Commit() error

func (*Stream) Write ¶

func (s *Stream) Write(pass uint8, offset uint32, pixels []byte) error

Source Files ¶

View all Source files

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