Hello,
I've started to add values for hp2400 in genesys_devices.c,
accordingly to some usbsniff logs I received. I have also added a
genesys_repark_head() function that do the same thing than the windows
driver: it moves head forward slightly, then go backward for a long distance,
which eventually parks head.
Since I haven't the hardware, it is untested. To fix it, you'll have
to get the registers match the following values (start and end pixel aren't
important since no data is actually scanned):
slope_table0=800 800
fe[0x01]=0x0003
R01=0x00 CCD, disable shading, normal scanning, uncompressed data, DRAM
4Mx1, shading whole line, disable scan
R02=0x31 auto-go-home enabled, enable moving when buffer full,
auto-go-home after scan, turn on MOTOR power and phase, one table motor moving,
motor forward, bipolar: half step, unipolar: half step
R03=0x19 alternated CCD TG function disabled, select dpi deletion
function, transparency lamp off, lamp POWER on, lamp sleeping on, lamp on
time=1*64k line period
R04=0x13 color lineart, 8 bits data, frontend type 16 bits, scan color
type color, frontend B
R05=0x50 1200 dpi, 14 bits gamma table, disable gamma correction, normal
gray CIS, 24 clocks/pixel
R06=0x18 PWRBIT on, shading gain=4, normal AFE image capture
R07=0x00 MPU access under command mode, MPU write DRAM under command
mode,
R08=0x02 CCD RS rising edge position=2
R09=0x16 CCD RS falling edge position=22
R0a=0x0b CCD CP rising edge position=11
R0b=0x15 CCD CP falling edge position=21
R10=0x00
R11=0x00 Red exposure time=0
R12=0x00
R13=0x00 Green exposure time=0
R14=0x00
R15=0x00 Blue exposure time=0
R16=0x33 CCD CP & RS low when TG high, forward CCD RGBSEL, inverse CCD
TG, inverse CCD Clock 1, forward CCD Clock 2, forward CCD CP & RS, disable CCD
TG position Clock 1/2 signal, disable CCD TG position CP & RS signal
R17=0x08 without dummy line CCD TG type, CCD TG width=8
R18=0x30 TG and clock set to non-Canon CIS style, 2 time CCD clocks
speed for dummy line, half cycle per pixel for CCD Clock/2, sytem clock for CCD
Clock/2 delay=0, 1 time CCD Clock speed for capture image
R19=0x2a dummy exposure time=42
R1a=0x00 CCD Clock rising edge position=0
R1b=0x00 CCD Clock falling edge position=0
R1c=0x00 disable CCD Clock 3, forward CCD Clock 3, Blue channel TG=0,
Green channel TG=0, Red channel TG=0
R1d=0x02 automatic CCD Clock/2 programming, CCD shoulder width=2
R1e=0x10 watchdog time=1, 0 dummy line
R1f=0x10 SCANFED=16
R20=0x20 BUFSEL=32 2k words
R21=0x02 STEPNO=2
R22=0x10 FWDSTEP=16
R23=0x10 BWDSTEP=16
R24=0x02 FASTNO=2
R25=0x00
R26=0x00
R27=0xd4 LINCNT=212
R28=0x01
R29=0xff LAMPPWM=511 12 duty
R2c=0x02
R2d=0x58 DPISET=600
R2e=0x78 B&W high threshold=120
R2f=0x7f B&W low threshold=127
R30=0x00
R31=0x57 start pixel=87
R32=0x09
R33=0xb7 end pixel=2487
R34=0x0c dummy pixel count=12
R35=0x00
R36=0x0e
R37=0x11 maximum word size per line=3601
R38=0x2e
R39=0x7e CCD line period set to 11902
R3d=0x00
R3e=0x00
R3f=0xe8 motor feeding steps write=232
R50=0x00 frontend read address=0
R51=0x00 frontend write address=0
R52=0x0b Red low byte AFE data latch=11
R53=0x0f Red high byte AFE data latch=15
R54=0x13 Green low byte AFE data latch=19
R55=0x17 Green high byte AFE data latch=23
R56=0x03 Blue low byte AFE data latch=3
R57=0x07 Blue high byte AFE data latch=7
R58=0x63 AFE image sampling rising edge=12, AFE image sampling pulse
width=3,
R59=0x00 AFE dark voltage sampling rising edge=0, AFE dark voltage
sampling pulse width=0,
R5a=0xc1 Wolfson AFE type, select reset level clamp, AFE CDSREF=0, AFE
RLC=1, 5a inconnu
R5c=0x00 first point of falling edge=0,
R5d=0x00 second point of falling edge=0,
R5e=0x00 first point of falling edge=0,
R5f=0x00 second point of falling edge=0,
R62=0x00
R63=0x00 Z2MOD=0
R64=0x00 unipolar motor phase=0
R65=0x3f unipolar motor phase duty cycle=63/64
R66=0x10
R67=0x00 GPO=1000
R68=0x31
R69=0x00 GPO enable=3100
R6a=0x7f bipolar: half step, unipolar: half stepunipolar motor phase
duty cycle=63/64
R6b=0x80 fast moving slop steps=128
R6c=0x00 TGTIME=0^2 periods, Z1MOD[18:16]=0, Z2MOD[18:16]=0,
R6d=0x7f go home deceleration steps=3^2, stop time (in LPERIOD)=31,
You'll have to set SANE_DEBUG_GENESYS to 255 to get log from the
backend. When genesys_repark_head() is finished, the backend will try to do
genesys_warmup_lamp() . However, I haven't touch it for hp2400 yet. From
windows logs, we can see that 2 lines are read at a time, while current code
reads only one. It seems that this warm up also does offset and coarse gain
calibration.
More usbsniff logs are needed to complete hp2400 support. The log of
a fresh (first) plug of the scanner followed by a preview would be interested.
Then full width scans (but with height kept low to minimize data) at 150, 300,
600 and 1200 dpi will allow us to find how the hp2400 CCD works.
When using usbsniff, I launch it before plugging the scanner. Then each
time a scan is done, I click on the usbsniff window to give it focus. In the
windows world, that gives a high priority, and ensures that it can log all USB
packets correctly.
Regards,
Stef
