kopia lustrzana https://gitlab.com/sane-project/backends
110 wiersze
3.0 KiB
Plaintext
110 wiersze
3.0 KiB
Plaintext
Scanner overview
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- One pass scanner
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- 10 DPI minimum. Max X=600 dpi, max Y=1200 dpi.
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- A4 size
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/*--------------------------------------------------------------------------*/
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Components:
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- Weltrend WT8616
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- TEMIC TSC 80C31 (CMOS 0 to 44 MHz Single-Chip 8 Bit Microcontroller)
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/*--------------------------------------------------------------------------*/
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SCSI overview
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- the SCSI implementation in this scanner is non-standard but simple.
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- there is no REQUEST SENSE command.
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- since there is no sense, it is impossible to know if a command has succeeded.
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/*--------------------------------------------------------------------------*/
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SCSI commands:
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TEST UNIT READY
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00 00 00 00 01 00
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Returns 1 byte of data:
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00 = scanner ready
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ff = scanner not ready
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Vendor Spec
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02 00 00 00 04 00
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Get 4 bytes of status. Used to check the button.
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Default result when the button is not pressed
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06 00 00 00
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INQUIRY
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result:
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06 00 02 02 30 00 00 10 4b 49 4e 50 4f 20 20 20 ....0...KINPO
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56 69 76 69 64 73 63 61 6e 20 53 31 32 30 20 20 Vividscan S120
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53 31 33 20 20 20 20 20 02 01 00 00 4a 45 46 46 S13 ....JEFF
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...
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MODE SEL
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15 10 00 00 18 00
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SCAN
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1B 00 00 00 00 00
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RECEIVE DIAG
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1C 00 00 00 03 00
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SEND DIAG
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1D 00 80 00 00 00
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SET WINDOW
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24 00 00 00 00 00 00 00 52 00
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The window size is always 0x52 bytes. The parameters look standard:
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- X/Y resolution |
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- Upper left X,Y |- all three coded in 600 dpi units
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- Width, Length |
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The supported scan modes are:
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- lineart image comp=0, halftone=0, depth=1
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- halftone image comp=0, haltone=1 to 4, depth=1
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- grayscale image comp=2, halftone=0, depth=8
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- color image comp=5, halftone=0, depth=24
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Y resolution is not used (X is also used for Y)
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X resolution is limited to 600 (if above, scanner defaults to 600)
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Y resolution is limited to 1200 (if above, scanner defaults to 1200)
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Image composition is byte 33, halftone is byte 36, depth is byte 34
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READ (10)
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28 00 00 00 00 00 00 FE 9A 00
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SEND (10)
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2A 00 03 00 00 02 00 03 00 00
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Sends 300h bytes of gamma. 100h bytes per color. What is the color order?
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GET DATA BUFFER STATUS
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34 01 00 00 00 00 00 00 10 00
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Returns:
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- byte 0 to 7: ? (these bytes looks rather standard)
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- byte 8 to 11: total size left to read
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- byte 12 to 13: number of lines (constant during a scan)
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- byte 14 to 15: pixels per line (constant during a scan)
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/*--------------------------------------------------------------------------*/
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Color shifts
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Color order returned by the scanner is Red, then Green, then Blue. There is a color shift, meaning the raster for the Red is not followed by the Green raster for the same line.
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The shifts are:
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dpi lines per color
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1200 16
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1125 15
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1050 14
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900 12
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750 10
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600 8
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450 6
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300 4
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150 2
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90 1
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75 1
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50 0
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Some resolution give garbage. However that table might not be complete.
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