CommandsControl reset
^DD - Download Direct Bitmap
Downloads and immediately prints bitmap without storage
^DD - Download Direct Bitmap
Overview
The ^DD command downloads and immediately prints a bitmap image without storing it in memory. Allows printing graphics directly from host without consuming printer memory, useful for one-time images or memory-constrained situations.
Syntax
^DDa,b,DATAParameters
- a = Total bytes in graphic
- b = Bytes per row
- DATA = ASCII hex image data
Description
- Downloads bitmap directly
- Prints without storing
- Frees printer memory
- One-time graphics
- Immediate output
Examples
Direct Bitmap Print
^XA
^FO100,100
^DD200,25,
00FF00FF00FF...
^FS
^XZComparison with ~DG
| Command | Storage | Use Case |
|---|---|---|
| ~DG | Stored in memory | Reused graphics |
| ^DD | Not stored | One-time graphics |
Usage Notes
- Data must match byte counts
- No memory consumption
- Useful for large graphics
- CR/LF allowed in DATA
- Extra data ignored
- Performance optimized
When to Use
Good For
- One-time images
- Memory-constrained
- Large graphics
- Dynamic images
Not For
- Repeated graphics (use ~DG)
- Limited bandwidth
- Multiple copies
Related Commands
~DG- Download Graphic^XG- Recall Graphic^ID- Image Delete