Canon LiDE 90

[Guillaume Gastebois]

Hello,

OK, my motor moves !

But, someting doesn't work during initialisation : I get floating point
error !

I modified genesys_gl841.c for instrumentation and genesys_devices.c
(genesys_sensor section) in accordance to my windows usb snoop log (see
attacement).

SANE_DEBUG_GENESYS_GL841=255 scanimage
-device-name=genesys:libusb:001:066 > toto.pnm ends with :

[genesys_gl841] reg[0x86] = 0x00
[genesys_gl841] reg[0x87] = 0x00
[genesys_gl841] gl841_bulk_write_register: wrote 104 registers
[genesys_gl841] gl841_led_calibration: starting first line reading
[genesys_gl841] gl841_begin_scan
[genesys_gl841] gl841_bulk_write_register (elems = 4)
[genesys_gl841] reg[0x03] = 0x5f
[genesys_gl841] reg[0x01] = 0x81
[genesys_gl841] reg[0x0d] = 0x01
[genesys_gl841] reg[0x0f] = 0x01
[genesys_gl841] gl841_bulk_write_register: wrote 4 registers
[genesys_gl841] gl841_begin_scan: completed
[genesys_gl841] gl841_bulk_read_data: requesting 31200 bytes
[genesys_gl841] gl841_bulk_read_data: trying to read 31200 bytes of data
[genesys_gl841] gl841_bulk_read_data read 31200 bytes, 0 remaining
[genesys_gl841] gl841_bulk_read_data: completed
[genesys_gl841] gl841_led_calibration: average: 0,801,302
[genesys_gl841] gl841_led_calibration: avga=367,expr=0,expg=0,expb=0,avge=0
Exception en point flottant (floating point exception)

See sample image toto.jpg too (when commenting zero division in
genesys_gl841.c the scanner scans an image).

Help needed thanks

Guillaume



/* sane - Scanner Access Now Easy.

   Copyright (C) 2003 Oliver Rauch
   Copyright (C) 2003-2005 Henning Meier-Geinitz <henning@...>
   Copyright (C) 2004, 2005 Gerhard Jaeger <gerhard@...>
   Copyright (C) 2004-2007 Stephane Voltz <stef.dev@...>
   Copyright (C) 2005 Pierre Willenbrock <pierre@...>
   Copyright (C) 2007 Luke <iceyfor@...>
   
   This file is part of the SANE package.
   
   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.
   
   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston,
   MA 02111-1307, USA.
   
   As a special exception, the authors of SANE give permission for
   additional uses of the libraries contained in this release of SANE.
   
   The exception is that, if you link a SANE library with other files
   to produce an executable, this does not by itself cause the
   resulting executable to be covered by the GNU General Public
   License.  Your use of that executable is in no way restricted on
   account of linking the SANE library code into it.
   
   This exception does not, however, invalidate any other reasons why
   the executable file might be covered by the GNU General Public
   License.
   
   If you submit changes to SANE to the maintainers to be included in
   a subsequent release, you agree by submitting the changes that
   those changes may be distributed with this exception intact.
   
   If you write modifications of your own for SANE, it is your choice
   whether to permit this exception to apply to your modifications.
   If you do not wish that, delete this exception notice.
*/

/* ------------------------------------------------------------------------ */
/*                     Some setup DAC and CCD tables                        */
/* ------------------------------------------------------------------------ */

/** Setup table for various scanners using a Wolfson DAC
 */
static Genesys_Frontend Wolfson[] = {
  {{0x00, 0x03, 0x05, 0x11}
   , {0x00, 0x00, 0x00}
   , {0x80, 0x80, 0x80}
   , {0x02, 0x02, 0x02}
   , {0x00, 0x00, 0x00}
   }
  , /* UMAX */
  {{0x00, 0x03, 0x05, 0x03}
   , {0x00, 0x00, 0x00}
   , {0xc8, 0xc8, 0xc8}
   , {0x04, 0x04, 0x04}
   , {0x00, 0x00, 0x00}
   }
  , /* ST12 */
  {{0x00, 0x03, 0x05, 0x21}
   , {0x00, 0x00, 0x00}
   , {0xc8, 0xc8, 0xc8}
   , {0x06, 0x06, 0x06}
   , {0x00, 0x00, 0x00}
   }
  , /* ST24 */
  {{0x00, 0x03, 0x05, 0x12}
   , {0x00, 0x00, 0x00}
   , {0xc8, 0xc8, 0xc8}
   , {0x04, 0x04, 0x04}
   , {0x00, 0x00, 0x00}
   }
  , /* MD6228/MD6471 */
  {{0x00, 0x03, 0x05, 0x02}
   , {0x00, 0x00, 0x00}
   , {0xc0, 0xc0, 0xc0}
   , {0x07, 0x07, 0x07}
   , {0x00, 0x00, 0x00}
   }
  , /* HP2400c */
  {{0x00, 0x03, 0x04, 0x02}
   , {0x00, 0x00, 0x00}
   , {0xb0, 0xb0, 0xb0}
   , {0x04, 0x04, 0x04}
   , {0x00, 0x00, 0x00}
   }
  , /* HP2300c */
  {{0x00, 0x3d, 0x08, 0x00}
   , {0x00, 0x00, 0x00}
   , {0xe1, 0xe1, 0xe1}
   , {0x93, 0x93, 0x93}
   , {0x00, 0x19, 0x06}
   }
  , /* CANONLIDE35 */
};


/** for setting up the sensor-specific settings:
 * Optical Resolution, number of black pixels, number of dummy pixels,
 * CCD_start_xoffset, and overall number of sensor pixels
 * registers 0x08-0x0b, 0x10-0x1d and 0x52-0x59
 */
static Genesys_Sensor Sensor[] = {
  /* UMAX */
  {1200, 48, 64, 0, 10800, 210, 230,
   {0x01, 0x03, 0x05, 0x07}
   ,
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x33, 0x05, 0x31, 0x2a, 0x00, 0x00,
    0x00, 0x02}
   ,
   {0x13, 0x17, 0x03, 0x07, 0x0b, 0x0f, 0x23, 0x00, 0xc1, 0x00, 0x00, 0x00,
    0x00}
   ,
   1.0, 1.0, 1.0,
   NULL, NULL, NULL}
  ,
  /* Plustek OpticPro S12/ST12 */
  {600, 48, 85, 152, 5416, 210, 230,
   {0x02, 0x00, 0x06, 0x04}
   ,
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2b, 0x08, 0x20, 0x2a, 0x00, 0x00,
    0x0c, 0x03}
   ,
   {0x0f, 0x13, 0x17, 0x03, 0x07, 0x0b, 0x83, 0x00, 0xc1, 0x00, 0x00, 0x00,
    0x00}
   ,
   1.0, 1.0, 1.0,
   NULL, NULL, NULL}
  ,
  /* Plustek OpticPro S24/ST24 */
  {1200, 48, 64, 0, 10800, 210, 230,
   {0x0e, 0x0c, 0x00, 0x0c}
   ,
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x33, 0x08, 0x31, 0x2a, 0x00, 0x00,
    0x00, 0x02}
   ,
   {0x17, 0x03, 0x07, 0x0b, 0x0f, 0x13, 0x03, 0x00, 0xc1, 0x00, 0x00, 0x00,
    0x00}
   ,
   1.0, 1.0, 1.0,
   NULL, NULL, NULL}
  ,
  /* MD6471 */
  {1200,
   48,
   16, 0, 10872,
   210, 200,
   {0x0d, 0x0f, 0x11, 0x13}
   ,
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x0a, 0x30, 0x2a, 0x00, 0x00,
    0x00, 0x03}
   ,
   {0x0f, 0x13, 0x17, 0x03, 0x07, 0x0b, 0x23, 0x00, 0xc1, 0x00, 0x00, 0x00,
    0x00}
   ,
   2.38, 2.35, 2.34,
   NULL, NULL, NULL}
  ,
  /* HP2400c */
  {1200,
   48,
   15, 0, 10872, 210, 200,
   {0x14, 0x15, 0x00, 0x00}
   ,
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xbf, 0x08, 0x3f, 0x2a, 0x00, 0x00,
    0x00, 0x02}
   ,
   {0x0b, 0x0f, 0x13, 0x17, 0x03, 0x07, 0x63, 0x00, 0xc1, 0x00, 0x00, 0x00,
    0x00}
   ,
   1.0, 1.0, 1.0,
   NULL, NULL, NULL}
  ,
  /* HP2300c */
  {600,
   48,
   20, 0, 5454, 210, 200,
   {0x16, 0x00, 0x01, 0x03}
   ,
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb7, 0x0a, 0x20, 0x2a, 0x6a, 0x8a,
    0x00, 0x05}
   ,
   {0x0f, 0x13, 0x17, 0x03, 0x07, 0x0b, 0x83, 0x00, 0xc1, 0x06, 0x0b, 0x10,
    0x16}
   ,
   2.1, 2.1, 2.1,
   NULL, NULL, NULL}
  ,
  /* CANOLIDE35 */
  {1200,
/*TODO: find a good reason for keeping all three following variables*/
   87, /*(black) */
   87, /* (dummy) */
   0, /* (startxoffset) */
   10400, /*sensor_pixels */
   210,
   200,
   {0x00, 0x21, 0x00, 0x00},
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x06, 0x00, 0xFF,
    0x24, 0x00, 0x00, 0x04 /* TODO(these do no harm, but may be neccessery for CCD)*/
   },
   {0x02, 0x04,
    0x02, 0x04, 0x02, 0x04, /*[GB](HI|LOW) not needed for cis*/
    0x0a, 0x71,
    0x55, /*TODO: bit7*/
    0x00, 0x00, 0x20, 0x41 /*TODO (these do no harm, but may be neccessery for CCD)*/
   }
   ,
   1.0, 1.0, 1.0,
   NULL, NULL, NULL}
};

/** for General Purpose Output specific settings:
 * initial GPO value (registers 0x66-0x67/0x6c-0x6d)
 * GPO enable mask (registers 0x68-0x69/0x6e-0x6f)
 */
static Genesys_Gpo Gpo[] = {
  /* UMAX */
  {
   {0x11, 0x00}
   ,
   {0x51, 0x20}
   ,
   }
  ,
  /* Plustek OpticPro S12/ST12 */
  {
   {0x11, 0x00}
   ,
   {0x51, 0x20}
   ,
   }
  ,
  /* Plustek OpticPro S24/ST24 */
  {
   {0x00, 0x00}
   ,
   {0x51, 0x20}
   ,
   }
  ,
  /* MD5345/MD6471 */
  {
   {0x30, 0x00}
   , /* bits 11-12 are for bipolar V-ref input voltage */
   {0xa0, 0x18}
   ,
   }
  ,
  /* HP2400C */
  {
   {0x30, 0x00}
   ,
   {0x31, 0x00}
   ,
   }
  ,
  /* HP2300C */
  {
   {0x00, 0x00}
   ,
   {0x00, 0x00}
   ,
   }
  ,
  /* CANONLIDE35 */
  {
   {0x81, 0x80}
   ,
   {0xef, 0x80}
   ,
   }
};

#define MOTOR_ST24       2
static Genesys_Motor Motor[] = {
  /* UMAX */
  {
   1200, /* motor base steps */
   2400, /* maximum motor resolution */
   1, /* maximum step mode */
   1,                           /* number of power modes*/
   {{{  
     11000, /* maximum start speed */
     3000, /* maximum end speed */
     128, /* step count */
     1.0, /* nonlinearity */
     },
    {
     11000,
     3000,
     128,
     1.0,
   },},},
  },
  { /* MD5345/6228/6471 */
   1200,
   2400,
   1,
   1,
   {{{  
     2000,
     1375,
     128,
     0.5,
     },
    {
     2000,
     1375,
     128,
     0.5,
    },},},
  },
  { /* ST24 */
   2400,
   2400,
   1,
   1,
   {{{
     2289,
     2100,
     128,
     0.3,
     },
    {
     2289,
     2100,
     128,
     0.3,
    },},},
  },
  { /* HP 2400c */
   1200,
   2400,
   1,
   1,
   {{{
     11000,
     3000,
     128,
     1.0,
     },
    {
     11000,
     3000,
     128,
     1.0,
    },},},
  },
  { /* HP 2300c */
   600,
   1200,
   1,
   1,
   {{{
     3200,
     1200,
     128,
     0.5,
     },
    {
     3200,
     1200,
     128,
     0.5,
   },},},
  },
  { /* Canon LiDE 35 */
   1200,
   2400,
   1,
   1,
   {{{
     3500,
     1300,
     60,
     0.8,
     },
    {
     3500,
     1400,
     60,
     0.8,
    },},},
  },
};

/* here we have the various device settings...
 */
static Genesys_Model umax_astra_4500_model = {
  "umax-astra-4500", /* Name */
  "UMAX", /* Device vendor string */
  "Astra 4500", /* Device model name */
  GENESYS_GL646,
  NULL,

  {1200, 600, 300, 150, 75, 0}, /* possible x-resolutions */
  {2400, 1200, 600, 300, 150, 75, 0}, /* possible y-resolutions */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (3.5), /* Start of scan area in mm  (x) */
  SANE_FIX (7.5), /* Start of scan area in mm (y) */
  SANE_FIX (218.0), /* Size of scan area in mm (x) */
  SANE_FIX (299.0), /* Size of scan area in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in mm (y) */
  SANE_FIX (1.0), /* Start of black mark in mm (x) */

  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in TA mode in mm (y) */

  0, 8, 16, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_BGR, /* Order of the CCD/CIS colors */

  SANE_FALSE, /* Is this a CIS scanner? */
  CCD_UMAX,
  DAC_WOLFSON_UMAX,
  GPO_UMAX,
  MOTOR_UMAX,
  GENESYS_FLAG_UNTESTED, /* Which flags are needed for this scanner? */
  /* untested, values set by hmg */
  20,
  200
};

static Genesys_Model canon_lide_50_model = {
  "canon-lide-50", /* Name */
  "Canon", /* Device vendor string */
  "LiDE 35/40/50", /* Device model name */
  GENESYS_GL841,
  NULL,

  {1200, 600, 300, 150, 75, 0}, /* possible x-resolutions */
  {2400, 1200, 600, 300, 150, 75, 0}, /* possible y-resolutions */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (0.42), /* Start of scan area in mm  (x) */
  SANE_FIX (7.9), /* Start of scan area in mm (y) */
  SANE_FIX (218.0), /* Size of scan area in mm (x) */
  SANE_FIX (299.0), /* Size of scan area in mm (y) */

  SANE_FIX (3.0), /* Start of white strip in mm (y) */
  SANE_FIX (0.0), /* Start of black mark in mm (x) */

  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in TA mode in mm (y) */

  0, 0, 0, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_RGB, /* Order of the CCD/CIS colors */

  SANE_TRUE, /* Is this a CIS scanner? */
  CCD_CANONLIDE35,
  DAC_CANONLIDE35,
  GPO_CANONLIDE35,
  MOTOR_CANONLIDE35,
  GENESYS_FLAG_LAZY_INIT | GENESYS_FLAG_SKIP_WARMUP | GENESYS_FLAG_OFFSET_CALIBRATION | GENESYS_FLAG_DARK_WHITE_CALIBRATION, /* Which flags are needed for this scanner? */
  280,
  400
};

static Genesys_Model canon_lide_60_model = {
  "canon-lide-90", /* Name */
  "Canon", /* Device vendor string */
  "LiDE 90", /* Device model name */
  GENESYS_GL841,
  NULL,

  {1200, 600, 300, 150, 75, 0}, /* possible x-resolutions */
  {2400, 1200, 600, 300, 150, 75, 0}, /* possible y-resolutions */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (0.42), /* Start of scan area in mm  (x) */
  SANE_FIX (7.9), /* Start of scan area in mm (y) */
  SANE_FIX (218.0), /* Size of scan area in mm (x) */
  SANE_FIX (299.0), /* Size of scan area in mm (y) */

  SANE_FIX (3.0), /* Start of white strip in mm (y) */
  SANE_FIX (0.0), /* Start of black mark in mm (x) */

  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in TA mode in mm (y) */

  0, 0, 0, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_RGB, /* Order of the CCD/CIS colors */

  SANE_TRUE, /* Is this a CIS scanner? */
  CCD_CANONLIDE35,
  DAC_CANONLIDE35,
  GPO_CANONLIDE35,
  MOTOR_CANONLIDE35,
  GENESYS_FLAG_LAZY_INIT | GENESYS_FLAG_SKIP_WARMUP | GENESYS_FLAG_OFFSET_CALIBRATION | GENESYS_FLAG_DARK_WHITE_CALIBRATION, /* Which flags are needed for this scanner? */
  300,
  400
}; /* this is completely untested -- hmg */

static Genesys_Model hp2300c_model = {
  "hewlett-packard-scanjet-2300c", /* Name */
  "Hewlett Packard", /* Device vendor string */
  "ScanJet 2300c", /* Device model name */
  GENESYS_GL646,
  NULL,

  {600, 300, 150, 75, 0}, /* possible x-resolutions */
  {1200, 600, 300, 150, 75, 0}, /* possible y-resolutions, motor can go up to 1200 dpi */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (-2.0), /* Start of scan area in mm (x_offset) */
  SANE_FIX (0.0), /* Start of scan area in mm (y_offset) */
  SANE_FIX (215.9), /* Size of scan area in mm (x) */
  SANE_FIX (295.0), /* Size of scan area in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in mm (y) */
  SANE_FIX (1.0), /* Start of black mark in mm (x) */

  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in TA mode in mm (y) */

  16, 8, 0, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_RGB, /* Order of the CCD/CIS colors */

  SANE_FALSE, /* Is this a CIS scanner? */
  CCD_HP2300,
  DAC_WOLFSON_HP2300,
  GPO_HP2300,
  MOTOR_HP2300,
  GENESYS_FLAG_REPARK
    | GENESYS_FLAG_14BIT_GAMMA
    | GENESYS_FLAG_SEARCH_START
    | GENESYS_FLAG_MUST_WAIT
    | GENESYS_FLAG_DARK_CALIBRATION | GENESYS_FLAG_OFFSET_CALIBRATION,
  9,
  132
};

static Genesys_Model hp2400c_model = {
  "hewlett-packard-scanjet-2400c", /* Name */
  "Hewlett Packard", /* Device vendor string */
  "ScanJet 2400c", /* Device model name */
  GENESYS_GL646,
  NULL,

  {1200, 600, 300, 150, 75, 0}, /* possible x-resolutions */
  {2400, 1200, 600, 300, 150, 75, 0}, /* possible y-resolutions */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (3.5), /* Start of scan area in mm  (x) */
  SANE_FIX (7.5), /* Start of scan area in mm (y) */
  SANE_FIX (215.9), /* Size of scan area in mm (x) */
  SANE_FIX (297.2), /* Size of scan area in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in mm (y) */
  SANE_FIX (1.0), /* Start of black mark in mm (x) */

  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in TA mode in mm (y) */

  0, 8, 16, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_BGR, /* Order of the CCD/CIS colors */

  SANE_FALSE, /* Is this a CIS scanner? */
  CCD_HP2400,
  DAC_WOLFSON_HP2400,
  GPO_HP2400,
  MOTOR_HP2400,
  GENESYS_FLAG_UNTESTED /* not fully working yet */
    | GENESYS_FLAG_REPARK
    | GENESYS_FLAG_14BIT_GAMMA
    | GENESYS_FLAG_SEARCH_START
    | GENESYS_FLAG_MUST_WAIT
    | GENESYS_FLAG_DARK_CALIBRATION | GENESYS_FLAG_OFFSET_CALIBRATION,
  20,
  132
};

static Genesys_Model hp3670c_model = {
  "hewlett-packard-scanjet-3670c", /* Name */
  "Hewlett Packard", /* Device vendor string */
  "ScanJet 3670c", /* Device model name */
  GENESYS_GL646,
  NULL,

  {1200, 600, 300, 150, 75, 0}, /* possible x-resolutions */
  {2400, 1200, 600, 300, 150, 75, 0}, /* possible y-resolutions */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (3.5), /* Start of scan area in mm  (x) */
  SANE_FIX (7.5), /* Start of scan area in mm (y) */
  SANE_FIX (215.9), /* Size of scan area in mm (x) */
  SANE_FIX (297.2), /* Size of scan area in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in mm (y) */
  SANE_FIX (1.0), /* Start of black mark in mm (x) */

  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in TA mode in mm (y) */

  0, 8, 16, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_BGR, /* Order of the CCD/CIS colors */

  SANE_FALSE, /* Is this a CIS scanner? */
  CCD_UMAX,
  DAC_WOLFSON_UMAX,
  GPO_UMAX,
  MOTOR_UMAX,
  GENESYS_FLAG_UNTESTED, /* Which flags are needed for this scanner? */
  /* untested, values set by mike p. according to vendor's datasheet. */
  20,
  200
};

static Genesys_Model plustek_st12_model = {
  "plustek-opticpro-st12", /* Name */
  "Plustek", /* Device vendor string */
  "OpticPro ST12", /* Device model name */
  GENESYS_GL646,
  NULL,

  {600, 300, 150, 75, 0}, /* possible x-resolutions */
  {1200, 600, 300, 150, 75, 0}, /* possible y-resolutions */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (3.5), /* Start of scan area in mm  (x) */
  SANE_FIX (7.5), /* Start of scan area in mm (y) */
  SANE_FIX (218.0), /* Size of scan area in mm (x) */
  SANE_FIX (299.0), /* Size of scan area in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in mm (y) */
  SANE_FIX (1.0), /* Start of black mark in mm (x) */

  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in TA mode in mm (y) */

  0, 8, 16, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_BGR, /* Order of the CCD/CIS colors */

  SANE_FALSE, /* Is this a CIS scanner? */
  CCD_ST12,
  DAC_WOLFSON_ST12,
  GPO_ST12,
  MOTOR_UMAX,
  GENESYS_FLAG_UNTESTED | GENESYS_FLAG_14BIT_GAMMA, /* Which flags are needed for this scanner? */
  20,
  200
};

static Genesys_Model plustek_st24_model = {
  "plustek-opticpro-st24", /* Name */
  "Plustek", /* Device vendor string */
  "OpticPro ST24", /* Device model name */
  GENESYS_GL646,
  NULL,

  {1200, 600, 300, 150, 75, 0}, /* possible x-resolutions */
  {2400, 1200, 600, 300, 150, 75, 0}, /* possible y-resolutions */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (3.5), /* Start of scan area in mm  (x) */
  SANE_FIX (7.5), /* Start of scan area in mm (y) */
  SANE_FIX (218.0), /* Size of scan area in mm (x) */
  SANE_FIX (299.0), /* Size of scan area in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in mm (y) */
  SANE_FIX (1.0), /* Start of black mark in mm (x) */

  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0), /* Start of white strip in TA mode in mm (y) */

  0, 8, 16, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_BGR, /* Order of the CCD/CIS colors */

  SANE_FALSE, /* Is this a CIS scanner? */
  CCD_ST24,
  DAC_WOLFSON_ST24,
  GPO_ST24,
  MOTOR_ST24,
  GENESYS_FLAG_UNTESTED
    | GENESYS_FLAG_14BIT_GAMMA
    | GENESYS_FLAG_LAZY_INIT
    | GENESYS_FLAG_USE_PARK
    | GENESYS_FLAG_SKIP_WARMUP
    | GENESYS_FLAG_SEARCH_START | GENESYS_FLAG_OFFSET_CALIBRATION,
  20,
  200
};

static Genesys_Model medion_md5345_model = {
  "medion-md5345-model", /* Name */
  "Medion", /* Device vendor string */
  "MD5345/MD6228/MD6471", /* Device model name */
  GENESYS_GL646,
  NULL,

  {1200, 600, 300, 200, 150, 100, 75, 50, 0}, /* possible x-resolutions */
  {2400, 1200, 600, 500, 400, 300, 250, 200, 150, 100, 50, 0}, /* possible y-resolutions */
  {16, 8, 0}, /* possible depths in gray mode */
  {16, 8, 0}, /* possible depths in color mode */

  SANE_FIX (1.00), /* Start of scan area in mm  (x) */
  SANE_FIX (5.00), /* 2.79 < Start of scan area in mm (y) */
  SANE_FIX (215.9), /* Size of scan area in mm (x) */
  SANE_FIX (296.4), /* Size of scan area in mm (y) */

  SANE_FIX (0.00), /* Start of white strip in mm (y) */
  SANE_FIX (0.00), /* Start of black mark in mm (x) */

  SANE_FIX (0.00), /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.00), /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (0.00), /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (0.00), /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.00), /* Start of white strip in TA mode in mm (y) */

  48, 24, 0, /* RGB CCD Line-distance correction in pixel */

  COLOR_ORDER_RGB, /* Order of the CCD/CIS colors */

  SANE_FALSE, /* Is this a CIS scanner? */
  CCD_5345,
  DAC_WOLFSON_5345,
  GPO_5345,
  MOTOR_5345,
  GENESYS_FLAG_14BIT_GAMMA
    | GENESYS_FLAG_LAZY_INIT
    | GENESYS_FLAG_USE_PARK
    | GENESYS_FLAG_SKIP_WARMUP
    | GENESYS_FLAG_SEARCH_START
    | GENESYS_FLAG_DARK_CALIBRATION
    | GENESYS_FLAG_STAGGERED_LINE | GENESYS_FLAG_OFFSET_CALIBRATION,
  32,
  200
};

static Genesys_USB_Device_Entry genesys_usb_device_list[] = {
  {0x0638, 0x0a10, &umax_astra_4500_model},
  {0x04a9, 0x2213, &canon_lide_50_model},
  {0x04a9, 0x1900, &canon_lide_60_model},
  {0x03f0, 0x0901, &hp2300c_model},
  {0x03f0, 0x0a01, &hp2400c_model},
  {0x03f0, 0x1405, &hp3670c_model},
  {0x07b3, 0x0600, &plustek_st12_model},
  {0x07b3, 0x0601, &plustek_st24_model},
  {0x0461, 0x0377, &medion_md5345_model},
  {0, 0, NULL}
};


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[Pierre Willenbrock-2]

Guillaume Gastebois schrieb:
> Hello,
>
> OK, my motor moves !

Cool.

>
> But, someting doesn't work during initialisation : I get floating point
> error !
>
> I modified genesys_gl841.c for instrumentation and genesys_devices.c
> (genesys_sensor section) in accordance to my windows usb snoop log (see
> attacement).
>
> SANE_DEBUG_GENESYS_GL841=255 scanimage
> -device-name=genesys:libusb:001:066 > toto.pnm ends with :

(please use both SANE_DEBUG_GENESYS_GL841=255 and
SANE_DEBUG_GENESYS=255, the device specific code calls back into the
unspecific code)

>
> [genesys_gl841] reg[0x86] = 0x00
> [genesys_gl841] reg[0x87] = 0x00
> [genesys_gl841] gl841_bulk_write_register: wrote 104 registers
> [genesys_gl841] gl841_led_calibration: starting first line reading
> [genesys_gl841] gl841_begin_scan
> [genesys_gl841] gl841_bulk_write_register (elems = 4)
> [genesys_gl841] reg[0x03] = 0x5f
> [genesys_gl841] reg[0x01] = 0x81
> [genesys_gl841] reg[0x0d] = 0x01
> [genesys_gl841] reg[0x0f] = 0x01
> [genesys_gl841] gl841_bulk_write_register: wrote 4 registers
> [genesys_gl841] gl841_begin_scan: completed
> [genesys_gl841] gl841_bulk_read_data: requesting 31200 bytes
> [genesys_gl841] gl841_bulk_read_data: trying to read 31200 bytes of data
> [genesys_gl841] gl841_bulk_read_data read 31200 bytes, 0 remaining
> [genesys_gl841] gl841_bulk_read_data: completed
> [genesys_gl841] gl841_led_calibration: average: 0,801,302
> [genesys_gl841] gl841_led_calibration: avga=367,expr=0,expg=0,expb=0,avge=0
> Exception en point flottant (floating point exception)

that line above should be more like this:
[genesys_gl841] gl841_led_calibration: average: 43901,43865,43387

But you can ignore led-calibration for now, that is not essential when
debugging the backend. Just make sure the exposure settings in
Genesys_Sensor.regs_0x10_0x1d are good, for example from an usb log the
last register write to 0x10-0x15 before receiving actual scanned data.
If those stay all zero, the rgb-leds in your scanner are very probably
not controlled using the rgb-led-control-feature of the gl84x.

You can disable led calibration by commenting out the code in
genesys_flatbed_calibration. Offset/Gain calibration can be commented
out when the values in Genesys_Frontend are good, Shading calibration
can be disabled when you add OPTICAL_FLAG_DISABLE_SHADING to the flags
for gl841_init_optical_regs_scan. When shading calibration is disabled,
you get vertical stripes, the others lead to too dark/bright r/g/b channels.

Things that may be missing:
* leds need to be controlled correctly
* cis-sensor needs to get the correct clock signals(line toggle+pixel
  clock, half-resolution signal is optional for now)
* the analog frontend registers need to be setup correctly in
  Genesys_Frontend
* the readout position in the data stream from the analog frontend may
  need tweaking(registers 0x52,0x53)

When that is done, you should be able to get an image from your
scanner, although calibration may be lacking.

The data stream inside gl84x based cis-scanners(at least the LiDE
35/50/60) looks like this:
-----+
gl84x!
-----+
  ! r,g,b led control line, selects colors r, g, b in turn,
  ! controls exposure for each color
+---------+
!r,g,b led!
+---------+
  ! r,g,b light
+--------+
!original!
+--------+
  ! r,g,b component
+----------+
!cis sensor!
+----------+
  ! voltages proportional to light intensity
+---------------+
!analog frontend!
+---------------+
  ! 16bit intensity, multiplexed on 8bit data bus
-----+
gl84x!
-----+

> See sample image toto.jpg too (when commenting zero division in
> genesys_gl841.c the scanner scans an image).
>
> Help needed thanks
>
> Guillaume

Regards,
  Pierre


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[Guillaume Gastebois]

Hello,

Thank you Pierre.
I did all what you do : commenting the code in
genesys_flatbed_calibration (Offset/Gain calibration commented out too),
added OPTICAL_FLAG_DISABLE_SHADING to the flags in
gl841_init_optical_regs_scan

analog frontend is so :
    {0x00, 0x21, 0x00, 0x00},
    {0x02, 0x8b, 0x02, 0x8b, 0x02, 0x8b, 0x20, 0x06, 0x00, 0xff,
     0x24, 0x00, 0x00, 0x04},
    {0x02, 0x04,
     0x02, 0x04, 0x02, 0x04,
     0x0a, 0x71,
     0x55,
     0x00, 0x00, 0x20, 0x41}

I can now see my dinosaure ! See picture attached (colored dinosaure on
a white page). It's far from perfect !

 >Guillaume Gastebois schrieb:
 >> Hello,
 >>
 >> OK, my motor moves !
 >
 >Cool.
 >
 >>
 >> But, someting doesn't work during initialisation : I get floating >point
 >> error !
 >>
 >> I modified genesys_gl841.c for instrumentation and genesys_devices.c
 >> (genesys_sensor section) in accordance to my windows usb snoop log >(see
 >> attacement).
 >>
 >> SANE_DEBUG_GENESYS_GL841=255 scanimage
 >> -device-name=genesys:libusb:001:066 > toto.pnm ends with :
 >
 >(please use both SANE_DEBUG_GENESYS_GL841=255 and
 >SANE_DEBUG_GENESYS=255, the device specific code calls back into the
 >unspecific code)
 >
 >>
 >> [genesys_gl841] reg[0x86] = 0x00
 >> [genesys_gl841] reg[0x87] = 0x00
 >> [genesys_gl841] gl841_bulk_write_register: wrote 104 registers
 >> [genesys_gl841] gl841_led_calibration: starting first line reading
 >> [genesys_gl841] gl841_begin_scan
 >> [genesys_gl841] gl841_bulk_write_register (elems = 4)
 >> [genesys_gl841] reg[0x03] = 0x5f
 >> [genesys_gl841] reg[0x01] = 0x81
 >> [genesys_gl841] reg[0x0d] = 0x01
 >> [genesys_gl841] reg[0x0f] = 0x01
 >> [genesys_gl841] gl841_bulk_write_register: wrote 4 registers
 >> [genesys_gl841] gl841_begin_scan: completed
 >> [genesys_gl841] gl841_bulk_read_data: requesting 31200 bytes
 >> [genesys_gl841] gl841_bulk_read_data: trying to read 31200 bytes of
 >>data
 >> [genesys_gl841] gl841_bulk_read_data read 31200 bytes, 0 remaining
 >> [genesys_gl841] gl841_bulk_read_data: completed
 >> [genesys_gl841] gl841_led_calibration: average: 0,801,302
 >> [genesys_gl841] gl841_led_calibration:
 >>avga=367,expr=0,expg=0,expb=0,avge=0
 >> Exception en point flottant (floating point exception)
 >
 >that line above should be more like this:
 >[genesys_gl841] gl841_led_calibration: average: 43901,43865,43387
 >
 >But you can ignore led-calibration for now, that is not essential when
 >debugging the backend. Just make sure the exposure settings in
 >Genesys_Sensor.regs_0x10_0x1d are good, for example from an usb log the
 >last register write to 0x10-0x15 before receiving actual scanned data.
 >If those stay all zero, the rgb-leds in your scanner are very probably
 >not controlled using the rgb-led-control-feature of the gl84x.
 >
 >You can disable led calibration by commenting out the code in
 >genesys_flatbed_calibration. Offset/Gain calibration can be commented
 >out when the values in Genesys_Frontend are good, Shading calibration
 >can be disabled when you add OPTICAL_FLAG_DISABLE_SHADING to the flags
 >for gl841_init_optical_regs_scan. When shading calibration is disabled,
 >you get vertical stripes, the others lead to too dark/bright r/g/b
 >channels.
 >
 >Things that may be missing:
 >* leds need to be controlled correctly
 >* cis-sensor needs to get the correct clock signals(line toggle+pixel
 >  clock, half-resolution signal is optional for now)
 >* the analog frontend registers need to be setup correctly in
 >  Genesys_Frontend
 >* the readout position in the data stream from the analog frontend may
 >  need tweaking(registers 0x52,0x53)
 >
 >When that is done, you should be able to get an image from your
 >scanner, although calibration may be lacking.
 >
 >The data stream inside gl84x based cis-scanners(at least the LiDE
 >35/50/60) looks like this:
 >-----+
 >gl84x!
 >-----+
 >  ! r,g,b led control line, selects colors r, g, b in turn,
 >  ! controls exposure for each color
 >+---------+
 >!r,g,b led!
 >+---------+
 >  ! r,g,b light
 >+--------+
 >!original!
 >+--------+
 >  ! r,g,b component
 >+----------+
 >!cis sensor!
 >+----------+
 >  ! voltages proportional to light intensity
 >+---------------+
 >!analog frontend!
 >+---------------+
 >  ! 16bit intensity, multiplexed on 8bit data bus
 >-----+
 >gl84x!
 >-----+
 >
 >> See sample image toto.jpg too (when commenting zero division in
 >> genesys_gl841.c the scanner scans an image).
 >>
 >> Help needed thanks
 >>
 >> Guillaume
 >
 >Regards,
 >  Pierre


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[Guillaume Gastebois]

 >But you can ignore led-calibration for now, that is not essential when
 >debugging the backend. Just make sure the exposure settings in
 >Genesys_Sensor.regs_0x10_0x1d are good, for example from an usb log the
 >last register write to 0x10-0x15 before receiving actual scanned data.
 >If those stay all zero, the rgb-leds in your scanner are very probably
 >not controlled using the rgb-led-control-feature of the gl84x.
 >
 >You can disable led calibration by commenting out the code in
 >genesys_flatbed_calibration. Offset/Gain calibration can be commented
 >out when the values in Genesys_Frontend are good, Shading calibration
 >can be disabled when you add OPTICAL_FLAG_DISABLE_SHADING to the flags
 >for gl841_init_optical_regs_scan. When shading calibration is disabled,
 >you get vertical stripes, the others lead to too dark/bright r/g/b
 >channels.
 >
 >Things that may be missing:
 >* leds need to be controlled correctly
 >* cis-sensor needs to get the correct clock signals(line toggle+pixel
 >  clock, half-resolution signal is optional for now)
 >* the analog frontend registers need to be setup correctly in
 >  Genesys_Frontend
 >* the readout position in the data stream from the analog frontend may
 >  need tweaking(registers 0x52,0x53)
 >
 >When that is done, you should be able to get an image from your
 >scanner, although calibration may be lacking.
 >
 >Regards,
 >  Pierre

OK, i see some image (very far to end result...). But can you explain to
me how to know the correct values for genesys_frontend ????
These parameter have big influence on resulting image.

Thank you.
Guillaume

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[Pierre Willenbrock-2]

Guillaume Gastebois schrieb:

>  >But you can ignore led-calibration for now, that is not essential when
>  >debugging the backend. Just make sure the exposure settings in
>  >Genesys_Sensor.regs_0x10_0x1d are good, for example from an usb log the
>  >last register write to 0x10-0x15 before receiving actual scanned data.
>  >If those stay all zero, the rgb-leds in your scanner are very probably
>  >not controlled using the rgb-led-control-feature of the gl84x.
>  >
>  >You can disable led calibration by commenting out the code in
>  >genesys_flatbed_calibration. Offset/Gain calibration can be commented
>  >out when the values in Genesys_Frontend are good, Shading calibration
>  >can be disabled when you add OPTICAL_FLAG_DISABLE_SHADING to the flags
>  >for gl841_init_optical_regs_scan. When shading calibration is disabled,
>  >you get vertical stripes, the others lead to too dark/bright r/g/b
>  >channels.
>  >
>  >Things that may be missing:
>  >* leds need to be controlled correctly
>  >* cis-sensor needs to get the correct clock signals(line toggle+pixel
>  >  clock, half-resolution signal is optional for now)
>  >* the analog frontend registers need to be setup correctly in
>  >  Genesys_Frontend
>  >* the readout position in the data stream from the analog frontend may
>  >  need tweaking(registers 0x52,0x53)
>  >
>  >When that is done, you should be able to get an image from your
>  >scanner, although calibration may be lacking.
>  >
>  >Regards,
>  >  Pierre
>
> OK, i see some image (very far to end result...). But can you explain to
> me how to know the correct values for genesys_frontend ????
> These parameter have big influence on resulting image.
>

genesys_frontend contains the settings for the analog frontend.

the canon lide 35/40/50 seem to be all using the wm8199(afair) or a
compatible chip, so that datasheet may be helpful.

Datasheets for the wolfson analog frontends can be found on their website:
http://www.wolfsonmicro.com/productListings/imaging_sensor_adcs/

gl841_set_fe and the calibration functions are currently setup to handle
a wm8199.

The reg, reg2 and sign entries need to be obtained from an usb log. I
don't know the actual register mapping, but it should be easy to figure
that out from gl841_set_fe.

gain and offset will be calibrated by one of the calibration functions.
The values depend heavily on the LED and Sensor characteristics. For
now, when the LED exposure time is constant, you can get away with
constant values.

There seems to be no way to find the exact analog frontend chip without
looking at the pcb, but that is hopefully not needed.

Simplified, you get the result of this equation from the analog
frontend(The datasheet has the details):

v: proportional to input voltage from sensor
o: offset(not necessarily the value from the register)
g: gain-factor(not necessarily the value from the register)
d: digital output value

d = (o + v) * g

The behaviour of the sensor can be described by this equation:

i: proportional to the light intensity, which is proportional to led
exposure time and shade on your original
v_o: offset voltage
s: sensitivity of sensor(voltage per intensity)

v = v_o + i * s

The offset/gain calibration optimizes offset and gain such that maximum
and minimum v fall in the range between maximum and minimum d, but
trying to maximize the range used in d(this requires at least one led
exposure time to be setup reasonably).

The LED calibration tries to get all LED colors to result in a similar
value into the analog frontend, by adjusting the exposure time(this
requires analog frontend offset/gain values to be setup reasonably).


Sorry for the lengthy mail, but i hope the information is helpful.

Regards,
  Pierre

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[Guillaume Gastebois]

Hello,

OK,
I open my LiDE 90 (very hard not all to destroy...).
I find these IC's :

        GL842 (Genesys well known scanner chip)
        GLT44016P (SO40 RAM)
        BU6574 (TSSOP20 ????????????)
        VHC175 (TSSOP16 quad flip flop)
        VHC08 (TSSOP16 quad and)
        LB1940 (TSSOP20 constant current driver)
        LM324 (SO14 quad op amp)
        1733 (TO-263 regularor)

Appart the BU6574 (I dont find what it is) I dont find any analog
frontend. Is it possible that this chip is located with leds (seems very
hard to open.....)

regards
Guillaume

Pierre Willenbrock a écrit :

> Guillaume Gastebois schrieb:
>>  >But you can ignore led-calibration for now, that is not essential when
>>  >debugging the backend. Just make sure the exposure settings in
>>  >Genesys_Sensor.regs_0x10_0x1d are good, for example from an usb log the
>>  >last register write to 0x10-0x15 before receiving actual scanned data.
>>  >If those stay all zero, the rgb-leds in your scanner are very probably
>>  >not controlled using the rgb-led-control-feature of the gl84x.
>>  >
>>  >You can disable led calibration by commenting out the code in
>>  >genesys_flatbed_calibration. Offset/Gain calibration can be commented
>>  >out when the values in Genesys_Frontend are good, Shading calibration
>>  >can be disabled when you add OPTICAL_FLAG_DISABLE_SHADING to the flags
>>  >for gl841_init_optical_regs_scan. When shading calibration is disabled,
>>  >you get vertical stripes, the others lead to too dark/bright r/g/b
>>  >channels.
>>  >
>>  >Things that may be missing:
>>  >* leds need to be controlled correctly
>>  >* cis-sensor needs to get the correct clock signals(line toggle+pixel
>>  >  clock, half-resolution signal is optional for now)
>>  >* the analog frontend registers need to be setup correctly in
>>  >  Genesys_Frontend
>>  >* the readout position in the data stream from the analog frontend may
>>  >  need tweaking(registers 0x52,0x53)
>>  >
>>  >When that is done, you should be able to get an image from your
>>  >scanner, although calibration may be lacking.
>>  >
>>  >Regards,
>>  >  Pierre
>>
>> OK, i see some image (very far to end result...). But can you explain to
>> me how to know the correct values for genesys_frontend ????
>> These parameter have big influence on resulting image.
>>
>
> genesys_frontend contains the settings for the analog frontend.
>
> the canon lide 35/40/50 seem to be all using the wm8199(afair) or a
> compatible chip, so that datasheet may be helpful.
>
> Datasheets for the wolfson analog frontends can be found on their website:
> http://www.wolfsonmicro.com/productListings/imaging_sensor_adcs/
>
> gl841_set_fe and the calibration functions are currently setup to handle
> a wm8199.
>
> The reg, reg2 and sign entries need to be obtained from an usb log. I
> don't know the actual register mapping, but it should be easy to figure
> that out from gl841_set_fe.
>
> gain and offset will be calibrated by one of the calibration functions.
> The values depend heavily on the LED and Sensor characteristics. For
> now, when the LED exposure time is constant, you can get away with
> constant values.
>
> There seems to be no way to find the exact analog frontend chip without
> looking at the pcb, but that is hopefully not needed.
>
> Simplified, you get the result of this equation from the analog
> frontend(The datasheet has the details):
>
> v: proportional to input voltage from sensor
> o: offset(not necessarily the value from the register)
> g: gain-factor(not necessarily the value from the register)
> d: digital output value
>
> d = (o + v) * g
>
> The behaviour of the sensor can be described by this equation:
>
> i: proportional to the light intensity, which is proportional to led
> exposure time and shade on your original
> v_o: offset voltage
> s: sensitivity of sensor(voltage per intensity)
>
> v = v_o + i * s
>
> The offset/gain calibration optimizes offset and gain such that maximum
> and minimum v fall in the range between maximum and minimum d, but
> trying to maximize the range used in d(this requires at least one led
> exposure time to be setup reasonably).
>
> The LED calibration tries to get all LED colors to result in a similar
> value into the analog frontend, by adjusting the exposure time(this
> requires analog frontend offset/gain values to be setup reasonably).
>
>
> Sorry for the lengthy mail, but i hope the information is helpful.
>
> Regards,
>   Pierre
>
>

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[Pierre Willenbrock-2]

Guillaume Gastebois schrieb:

> Hello,
>
> OK,
> I open my LiDE 90 (very hard not all to destroy...).
> I find these IC's :
>
> GL842 (Genesys well known scanner chip)
> GLT44016P (SO40 RAM)
> BU6574 (TSSOP20 ????????????)
> VHC175 (TSSOP16 quad flip flop)
> VHC08 (TSSOP16 quad and)
> LB1940 (TSSOP20 constant current driver)
> LM324 (SO14 quad op amp)
> 1733 (TO-263 regularor)
>
> Appart the BU6574 (I dont find what it is) I dont find any analog
> frontend. Is it possible that this chip is located with leds (seems very
> hard to open.....)
>

I don't know where the analog frontend may be found. There are arguments
for both positions.

The BU6574 has enough pins for the job. Did you look at the back of the
pcb?

In the documentation i found for one cis sensor, the glassy sensor
itself contains just the ccd row and the leds. There may be a small pcb
on the sensor bar, carrying the analog frontend.

But you really don't need to look for the chip and possibly destroy your
scanner on the way.. Let's first try to figure out how it is configured
from an usb log.

Regards,
  Pierre

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[Guillaume Gastebois]

OK, but via which register is it programmed. I find nothing in GL842 datasheet
for frontend.

regards
Guillaume

Selon Pierre Willenbrock <pierre@...>:

> Guillaume Gastebois schrieb:
> > Hello,
> >
> > OK,
> > I open my LiDE 90 (very hard not all to destroy...).
> > I find these IC's :
> >
> > GL842 (Genesys well known scanner chip)
> > GLT44016P (SO40 RAM)
> > BU6574 (TSSOP20 ????????????)
> > VHC175 (TSSOP16 quad flip flop)
> > VHC08 (TSSOP16 quad and)
> > LB1940 (TSSOP20 constant current driver)
> > LM324 (SO14 quad op amp)
> > 1733 (TO-263 regularor)
> >
> > Appart the BU6574 (I dont find what it is) I dont find any analog
> > frontend. Is it possible that this chip is located with leds (seems very
> > hard to open.....)
> >
>
> I don't know where the analog frontend may be found. There are arguments
> for both positions.
>
> The BU6574 has enough pins for the job. Did you look at the back of the
> pcb?
>
> In the documentation i found for one cis sensor, the glassy sensor
> itself contains just the ccd row and the leds. There may be a small pcb
> on the sensor bar, carrying the analog frontend.
>
> But you really don't need to look for the chip and possibly destroy your
> scanner on the way.. Let's first try to figure out how it is configured
> from an usb log.
>
> Regards,
>   Pierre
>

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[Gerhard Jaeger-2]

On Friday 01 February 2008 09:18:20 Guillaume Gastebois wrote:
> OK, but via which register is it programmed. I find nothing in GL842 datasheet
> for frontend.
>
check for register 0x04
Layout:
Bit 7   |Bit 6  |Bit 5 Bit 4 |Bit 3 Bit 2 |Bit 1 Bit 0
LINEART |BITSET |AFEMOD[1:0] |FILTER[1:0] |FESET[1:0]

HTH
Gerhard

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[Pierre Willenbrock-2]

Guillaume Gastebois schrieb:
> OK, but via which register is it programmed. I find nothing in GL842 datasheet
> for frontend.
>
> regards
> Guillaume
>

the analog frontend is programmed through the serial interface accessed
by address registers 0x50(FERDA)/0x51(FEWRA) and data registers
0x46/0x47(FERDDATA)/0x3a/0x3b(FEWRDATA).

I find this sequence in your log:

R/W ! addr ! data  ! WM8199 register
----+------+-------+-----------------
 W  ! 0x04 ! 0x000 ! reset
 R  ! 0x07 ! 0x041 ! revision number, ==0x41
 W  ! 0x04 ! 0x000 ! reset
 W  ! 0x01 ! 0x02f ! Setup reg 1: mode4==0, pgafs=2, selpd=1, mono=1,
cds=1, en=1
 W  ! 0x02 ! 0x007 ! Setup reg 2: del=0, rlcdacrng=0, 0=0, vrlcext=0,
invop=1, muxop=3
 W  ! 0x03 ! 0x026 ! Setup reg 3: chan=0, cdsref=2, rlcv=6
 W  ! 0x06 ! 0x00d ! Setup reg 4: fm=0, intm=0, rlcint=1, fme=1,
acycnrlc=0, linebyline=1
 W  ! 0x08 ! 0x000 ! Setup reg 5: 0=0, posnneg=0, vdel=0, vsmpdet=0
 W  ! 0x20 ! 0x050 ! dac value red(offset value)
 W  ! 0x21 ! 0x050 ! dac value green(offset value)
 W  ! 0x22 ! 0x050 ! dac value blue(offset value)
 W  ! 0x23 ! 0x050 ! dac value rgb(offset value)
 W  ! 0x28 ! 0x028 ! pga gain red(0x28 is a factor of 0.85)
 W  ! 0x29 ! 0x028 ! pga gain green
 W  ! 0x2a ! 0x028 ! pga gain blue
 W  ! 0x2b ! 0x028 ! pga gain rgb


all WM81xx(at least where datasheets are available) share a similar
register layout, with revision 0x41 at address 7. writing to the rgb
variant of pga gain/dac value results in writes to all the color
specific registers, so it is not needed.

So, you have in Genesys_Frontend: reg[1]=0x2f, reg[2]=0x07, reg[3]=0x26,
reg2[0]=0x0d, reg2[1]=0x00, the rest of reg/reg2 =0, all sign[x]=0,
offset[x]=0x50, gain[x]=0x28.

this does not match anything currently in genesys_devices.c. Just add
one entry to the Wolfson array, #define a DAC_xxxx to 7 in genesys_low.h
and put that in your Genesys_Model.

The gain/offset setting should be good for led calibration and will be
replaced by gain/offset calibration.

After that, get a scan of the calibration area(the area under the
housing at the parking position). For this, put 0 into the x_offset and
y_offset in your Genesys_Model. If this turns out to be similar to the
calibration area of the lide 50, led/offset/gain-calibration should work
with only minor changes.

Regards,
  Pierre

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