Mikkel Georgsen
1156eff896
- PrinterDriver interface: Connect/Print(bitmap,w,h)/Disconnect - ImageToRawBitmap(): 1-bit packed row-major converter from image.Image - MockDriver: saves PNG to SaveDir (/tmp default) for visual inspection - PrtQutieDriver: stub returns ErrNoDevice — safe before hardware arrives - ErrNoDevice, ErrNotConnected, ErrEmptyBitmap sentinel errors
64 lines
2 KiB
Go
64 lines
2 KiB
Go
package printer
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import (
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"go.bug.st/serial"
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)
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// PrtQutieDriver implements PrinterDriver for the PRT Qutie thermal printer.
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//
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// Protocol: UNKNOWN — reverse engineering required after hardware arrival 2026-04-13.
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//
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// TODO(hardware): Replace the stub Print() with real ESC/POS or PRT Qutie commands
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// after capturing USB traffic with Wireshark on hardware arrival day.
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// Reference: https://atctwo.net/posts/2024/07/16/thermal-printer.html
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type PrtQutieDriver struct {
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portPath string // resolved at Connect() time
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port serial.Port
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baudRate int
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}
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// NewPrtQutieDriver creates a stub driver. portPath is resolved at Connect() via
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// USB Manager VID/PID enumeration. baudRate 0 defaults to 9600.
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func NewPrtQutieDriver(baudRate int) *PrtQutieDriver {
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if baudRate == 0 {
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baudRate = 9600
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}
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return &PrtQutieDriver{baudRate: baudRate}
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}
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// Connect attempts to find and open the PRT Qutie serial port.
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// Currently returns ErrNoDevice — real port resolution requires hardware.
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//
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// TODO(hardware): Resolve portPath via serial.GetPortsList() + system_profiler VID/PID
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// cross-reference, then open the port with serial.Open().
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func (d *PrtQutieDriver) Connect() error {
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// Stub: return ErrNoDevice so callers can detect missing hardware gracefully.
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// Real implementation: enumerate ports, match VID:PID 0525:a4a7, open port.
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return ErrNoDevice
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}
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// Print sends label bitmap to the printer.
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// Returns ErrNotConnected if Connect() has not been successfully called.
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//
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// TODO(hardware): Implement PRT Qutie print protocol — likely a binary
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// command sequence (ESC/POS or proprietary). Capture with Wireshark.
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func (d *PrtQutieDriver) Print(bitmap []byte, width, height int) error {
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if d.port == nil {
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return ErrNotConnected
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}
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// TODO(hardware): implement PRT Qutie print protocol
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_ = bitmap
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_ = width
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_ = height
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return nil
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}
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// Disconnect closes the serial port if open.
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func (d *PrtQutieDriver) Disconnect() error {
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if d.port != nil {
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err := d.port.Close()
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d.port = nil
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return err
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}
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return nil
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}
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