kopia lustrzana https://gitlab.com/sane-project/backends
rts8891: add lamp warm-up
Implement lamp warm-up for Umax.734-support-for-canon-i-sensys-mf657cdw-mf650c-series
Ondrej Zary
Ralph Little
rodzic
eff6358dd7
commit
4e4180c459
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@ -227,6 +227,8 @@ static SANE_Status find_origin (struct Rts8891_Device *dev,
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static SANE_Status find_margin (struct Rts8891_Device *dev);
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static SANE_Status dark_calibration (struct Rts8891_Device *dev, int mode,
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int light);
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static SANE_Status lamp_warm_up (struct Rts8891_Device *dev, int mode,
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int light);
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static SANE_Status gain_calibration (struct Rts8891_Device *dev, int mode,
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int light);
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static SANE_Status offset_calibration (struct Rts8891_Device *dev, int mode,
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@ -1132,7 +1134,7 @@ sane_start (SANE_Handle handle)
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init_lamp (dev);
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/* do warming up if needed: just detected or at sane_open() */
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if (dev->needs_warming == SANE_TRUE)
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if (dev->needs_warming == SANE_TRUE && dev->sensor != SENSOR_TYPE_UMAX)
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{
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DBG (DBG_info, "sane_start: warming lamp ...\n");
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#ifdef HAVE_SYS_TIME_H
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@ -1274,6 +1276,21 @@ sane_start (SANE_Handle handle)
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sanei_rts88xx_write_reg (dev->devnum, LAMP_BRIGHT_REG,
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dev->regs + LAMP_BRIGHT_REG);
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/* step 3a: lamp warm-up (UMAX-only) */
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if (dev->sensor == SENSOR_TYPE_UMAX)
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{
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status = lamp_warm_up(dev, mode, light);
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if (status != SANE_STATUS_GOOD)
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{
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if (dev->conf.allowsharing == SANE_TRUE)
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{
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sanei_usb_release_interface (dev->devnum, 0);
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}
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DBG (DBG_error, "sane_start: lamp warm-up failed!\n");
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return status;
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}
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}
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/* step 4: gain calibration */
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status = gain_calibration (dev, mode, light);
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if (status != SANE_STATUS_GOOD)
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@ -5133,6 +5150,133 @@ dark_calibration (struct Rts8891_Device *dev, int mode, int light)
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return status;
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}
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/*
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* wait until lamp is warmed up enough. We repeat 6 single-line scans at
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* 1200dpi until the average value change between first and last is below
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* 0.3 %
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*/
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static SANE_Status
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lamp_warm_up (struct Rts8891_Device *dev, int mode, int light)
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{
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SANE_Status status = SANE_STATUS_GOOD;
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int num = 0;
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char name[32];
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unsigned char image[9600 * 3];
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float global, ra, ga, ba, first = 0;
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int seq = 1;
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#define LAMP_MAX_CYCLES 360 /* max. 2 minutes (120s/2s * 6) */
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DBG (DBG_proc, "lamp_warm_up: start\n");
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sanei_rts88xx_set_gain (dev->regs, 0, 0, 0);
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sanei_rts88xx_set_scan_area (dev->regs, 1, 2, 400, 400 + 9600); /* why 400? */
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sanei_rts88xx_set_status (dev->devnum, dev->regs, mode, light);
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dev->regs[0x00] = 0xe5; /* scan */
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dev->regs[0x32] = 0x00;
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dev->regs[0x33] = 0x03;
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dev->regs[0x35] = 0x0e;
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dev->regs[0x36] = 0x22;
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dev->regs[0x3a] = 0x0e;
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dev->regs[0x40] = 0x20;
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dev->regs[0x7a] = 0x01;
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dev->regs[0x8d] = 0x84;
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dev->regs[0x8e] = 0x63;
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dev->regs[0xb2] = 0x02;
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dev->regs[0xc0] = 0x1f;
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dev->regs[0xc1] = 0x00;
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dev->regs[0xc2] = 0xfe;
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dev->regs[0xc3] = 0xe0;
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dev->regs[0xc4] = 0xff;
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dev->regs[0xc5] = 0x01;
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dev->regs[0xc6] = 0x1f;
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dev->regs[0xc7] = 0x00;
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dev->regs[0xc8] = 0xfe;
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dev->regs[0xc9] = 0x00;
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dev->regs[0xca] = 0x00;
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dev->regs[0xcb] = 0x1c;
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dev->regs[0xcc] = 0x00;
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dev->regs[0xcd] = 0xc0;
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dev->regs[0xce] = 0x01;
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dev->regs[0xcf] = 0xeb;
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dev->regs[0xd0] = 0xed;
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dev->regs[0xd1] = 0xe1;
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dev->regs[0xd2] = 0x02;
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dev->regs[0xd3] = 0x12;
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dev->regs[0xd4] = 0xf4;
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dev->regs[0xd5] = 0x86;
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dev->regs[0xd6] = 0x1b;
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dev->regs[0xd7] = 0x10;
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dev->regs[0xd8] = 0xa6;
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dev->regs[0xd9] = 0x2d;
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dev->regs[0xda] = 0x00;
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dev->regs[0xe2] = 0x00;
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/*dev->regs[0xe5] = 0xf7;
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dev->regs[0xe6] = 0x2a; */
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SET_DOUBLE (dev->regs, EXPOSURE_REG, 0x2af7);
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dev->regs[0xe7] = 0x00;
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dev->regs[0xe8] = 0x00;
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dev->regs[0xe9] = 0x00;
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dev->regs[0xea] = 0x00;
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dev->regs[0xeb] = 0x00;
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dev->regs[0xec] = 0x00;
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dev->regs[0xed] = 0x00;
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dev->regs[0xef] = 0x00;
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dev->regs[0xf0] = 0x00;
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dev->regs[0xf2] = 0x00;
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/* scan 9600 pixels wide area in color mode 6 times
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* if average value difference between first and last scan is 0.3% or greater,
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* retry after 2 seconds */
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sanei_rts88xx_set_status (dev->devnum, dev->regs, mode, light);
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while (seq < LAMP_MAX_CYCLES)
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{
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/* do scan */
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status =
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rts8891_simple_scan (dev->devnum, dev->regs, dev->reg_count, 0x12,
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9600 * 3, image);
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if (status != SANE_STATUS_GOOD)
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{
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DBG (DBG_error, "lamp_warm_up: failed to scan\n");
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return status;
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}
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/* save scanned picture for data debugging */
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if (DBG_LEVEL >= DBG_io2)
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{
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sprintf (name, "warm%03d.pnm", num);
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write_rgb_data (name, image, 9600, 1);
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num++;
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}
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global = average_area (SANE_TRUE, image, 9600, 1, &ra, &ga, &ba);
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if (seq % 6 == 1)
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first = global;
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if (seq % 6 == 0)
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{
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DBG (DBG_info, "lamp_warm_up: change=%f\n", global / first);
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if (global / first < 1.003)
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break;
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sleep(2);
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}
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seq++;
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}
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if (seq >= LAMP_MAX_CYCLES)
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{
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DBG (DBG_error0, "lamp_warm_up: timed out waiting for lamp to stabilize\n");
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/* continue anyway */
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}
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DBG (DBG_proc, "lamp_warm_up: exit\n");
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return status;
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}
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/*
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* do gain calibration. We do scans until averaged values of the area match
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* the target code. We're doing a dichotomy again.
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