/* sane - Scanner Access Now Easy. Copyright (C) 1996, 1997 David Mosberger-Tang 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. This file implements a dynamic linking based SANE meta backend. It allows managing an arbitrary number of SANE backends by using dynamic linking to load backends on demand. */ /* ====================================================================== Userspace scan tool for the Microtek 3600 scanner slider movement (C) Marian Eichholz 2001 ====================================================================== */ #include "sm3600-scantool.h" /* tuning constants for DoOriginate */ #define CCH_BONSAI 60 #define MAX_PIXEL_PER_SCANLINE 5100 #define BLACK_HOLE_GRAY 30 #define CHASSIS_GRAY_LEVEL 100 #define BLACK_BED_LEVEL 10 /* ********************************************************************** DoOriginate() *shall* one time move the slider safely back to its origin. No idea, hoiw to achieve this, for now... ********************************************************************** */ typedef enum { ltHome, ltUnknown, ltBed, ltError } TLineType; #define INST_ASSERT2() { if (this->nErrorState) return ltError; } static TLineType GetLineType(TInstance *this) { unsigned char achLine[CCH_BONSAI+1]; unsigned char *puchBuffer; int cchBulk,i,iHole; int axHoles[3]; long lSum; TBool bHolesOk; int lMedian; bHolesOk=false; { unsigned char uchRegs2495[]={ 0x00 /*0x01*/, 0x00 /*0x02*/, 0x3F /*0x03*/, 0xEC /*!!0x04!!*/, 0x13 /*!!0x05!!*/, 0,0, 0x00 /*0x08*/, 0x3F /*!!0x09!!*/, 1,0, 0x6D /*0x0C*/, 0x70 /*0x0D*/, 0x69 /*0x0E*/, 0xD0 /*0x0F*/, 0x00 /*0x10*/, 0x00 /*0x11*/, 0x40 /*0x12*/, 0x15 /*0x13*/, 0x80 /*0x14*/, 0x2A /*0x15*/, 0xC0 /*0x16*/, 0x40 /*0x17*/, 0xC0 /*0x18*/, 0x40 /*0x19*/, 0xFF /*0x1A*/, 0x01 /*0x1B*/, 0x88 /*0x1C*/, 0x40 /*0x1D*/, 0x4C /*0x1E*/, 0x50 /*0x1F*/, 0x00 /*0x20*/, 0x0C /*0x21*/, 0x21 /*0x22*/, 0xF0 /*0x23*/, 0x40 /*0x24*/, 0x00 /*0x25*/, 0x0A /*0x26*/, 0xF0 /*0x27*/, 0x00 /*0x28*/, 0x00 /*0x29*/, 0x4E /*0x2A*/, 0xF0 /*0x2B*/, 0x00 /*0x2C*/, 0x00 /*0x2D*/, 0x4E /*0x2E*/, 0x88 /*R_CCAL*/, 0x88 /*R_CCAL2*/, 0x84 /*R_CCAL3*/, 0xEA /*R_LEN*/, 0x24 /*R_LENH*/, 0x63 /*0x34*/, 0x29 /*0x35*/, 0x00 /*0x36*/, 0x00 /*0x37*/, 0x00 /*0x38*/, 0x00 /*0x39*/, 0x00 /*0x3A*/, 0x00 /*0x3B*/, 0xFF /*0x3C*/, 0x0F /*0x3D*/, 0x00 /*0x3E*/, 0x00 /*0x3F*/, 0x01 /*0x40*/, 0x00 /*0x41*/, 0x00 /*R_CSTAT*/, 0x03 /*R_SPD*/, 0x01 /*0x44*/, 0x00 /*0x45*/, 0x59 /*!!R_CTL!!*/, 0xC0 /*0x47*/, 0x40 /*0x48*/, 0x96 /*!!0x49!!*/, 0xD8 /*0x4A*/ }; RegWriteArray(this,R_ALL, 74, uchRegs2495); } /* #2495[062.5] */ INST_ASSERT2(); /* dprintf(DEBUG_SCAN,"originate-%d...",iStripe); */ RegWrite(this,R_CTL, 1, 0x59); /* #2496[062.5] */ RegWrite(this,R_CTL, 1, 0xD9); /* #2497[062.5] */ i=WaitWhileScanning(this,5); if (i) return i; cchBulk=5100; /* cchBulk=RegRead(this,R_STAT, 2); if (cchBulk!=MAX_PIXEL_PER_SCANLINE) return SetError(this,SANE_STATUS_INVAL, "illegal scan line width reported (%d)",cchBulk); */ puchBuffer=(unsigned char*)calloc(1,cchBulk); CHECK_POINTER(puchBuffer); if (BulkReadBuffer(this,puchBuffer, cchBulk)!=cchBulk) { free(puchBuffer); return SetError(this,SANE_STATUS_IO_ERROR,"truncated bulk"); } lSum=0; for (i=0; iBLACK_HOLE_GRAY) i++; /* not very black */ c=0; dprintf(DEBUG_ORIG,"~ i=%d",i); while (i90) /* 90% of min hole diameter */ { axHoles[iHole]=i-c/2; /* store the middle of the hole */ dprintf(DEBUG_ORIG,"~ #%d=%d",iHole,axHoles[iHole]); iHole++; i+=10; /* some hysteresis */ } } if (iHole==3) { bHolesOk=true; for (i=0; i<2; i++) { int n=axHoles[i+1]-axHoles[i]; if (n<1050 || n>1400) bHolesOk=false; } if (axHoles[0]<400 || axHoles[0]>900) /* 2 cm tolerance */ bHolesOk=false; } else bHolesOk=false; lMedian=lSum/cchBulk; if (bHolesOk) { this->calibration.xMargin=axHoles[0]-480; /* left bed corner */ this->calibration.nHoleGray=puchBuffer[axHoles[0]]; /* black reference */ } dprintf(DEBUG_ORIG,"~ %s - %d\n", achLine, lMedian); free(puchBuffer); i=WaitWhileBusy(this,2); if (i) return i; if (bHolesOk && lMedian>CHASSIS_GRAY_LEVEL) return ltHome; if (lMedian<=BLACK_BED_LEVEL) return ltBed; return ltUnknown; } TState DoOriginate(TInstance *this, TBool bStepOut) { TLineType lt; if (this->bVerbose) fprintf(stderr,"carriage return...\n"); DBG(DEBUG_INFO,"DoOriginate()\n"); INST_ASSERT(); lt=GetLineType(this); /* if we are already at home, fine. If not, first jump a bit forward */ DBG(DEBUG_JUNK,"lt1=%d\n",(int)lt); if (lt!=ltHome && bStepOut) DoJog(this,200); while (lt!=ltHome && !this->state.bCanceled) { lt=GetLineType(this); DBG(DEBUG_JUNK,"lt2=%d\n",(int)lt); INST_ASSERT(); switch (lt) { case ltHome: continue; case ltBed: DoJog(this,-240); break; /* worst case: 1 cm */ default: DoJog(this,-24); break; /* 1 mm */ } } DoJog(this,1); INST_ASSERT(); /* Correction for 1 check line */ DBG(DEBUG_JUNK,"lt3=%d\n",(int)lt); return (this->state.bCanceled ? SANE_STATUS_CANCELLED : SANE_STATUS_GOOD); } /* ********************************************************************** DoJog(nDistance) The distance is given in 600 DPI. ********************************************************************** */ TState DoJog(TInstance *this, int nDistance) { int cSteps; int nSpeed,nRest; dprintf(DEBUG_SCAN,"jogging %d units...\n",nDistance); if (!nDistance) return 0; RegWrite(this,0x34, 1, 0x63); RegWrite(this,0x49, 1, 0x96); WaitWhileBusy(this,2); RegWrite(this,0x34, 1, 0x63); RegWrite(this,0x49, 1, 0x9E); /* that is a difference! */ INST_ASSERT(); cSteps=(nDistance>0) ? nDistance : -nDistance; { unsigned char uchRegs2587[]={ 0x00 /*0x01*/, 0x00 /*0x02*/, 0x3F /*0x03*/, 0x40 /*!!0x04!!*/, 0x00 /*!!0x05!!*/, 0,0, /* steps */ 0x00 /*0x08*/, 0x00 /*!!0x09!!*/, 0,0, /* y count */ 0x6D /*0x0C*/, 0x70 /*0x0D*/, 0x69 /*0x0E*/, 0xD0 /*0x0F*/, 0x00 /*0x10*/, 0x00 /*0x11*/, 0x40 /*0x12*/, 0x15 /*0x13*/, 0x80 /*0x14*/, 0x2A /*0x15*/, 0xC0 /*0x16*/, 0x40 /*0x17*/, 0xC0 /*0x18*/, 0x40 /*0x19*/, 0xFF /*0x1A*/, 0x01 /*0x1B*/, 0x88 /*0x1C*/, 0x40 /*0x1D*/, 0x4C /*0x1E*/, 0x50 /*0x1F*/, 0x00 /*0x20*/, 0x0C /*0x21*/, 0x21 /*0x22*/, 0xF0 /*0x23*/, 0x40 /*0x24*/, 0x00 /*0x25*/, 0x0A /*0x26*/, 0xF0 /*0x27*/, 0x00 /*0x28*/, 0x00 /*0x29*/, 0x4E /*0x2A*/, 0xF0 /*0x2B*/, 0x00 /*0x2C*/, 0x00 /*0x2D*/, 0x4E /*0x2E*/, 0x88 /*R_CCAL*/, 0x88 /*R_CCAL2*/, 0x84 /*R_CCAL3*/, 0xEA /*R_LEN*/, 0x24 /*R_LENH*/, 0x63 /*0x34*/, 0x29 /*0x35*/, 0x00 /*0x36*/, 0x00 /*0x37*/, 0x00 /*0x38*/, 0x00 /*0x39*/, 0x00 /*0x3A*/, 0x00 /*0x3B*/, 0xFF /*0x3C*/, 0x0F /*0x3D*/, 0x00 /*0x3E*/, 0x00 /*0x3F*/, 0x01 /*0x40*/, 0x00 /*0x41*/, 0x80 /*R_CSTAT*/, 0x03 /*R_SPD*/, 0x01 /*0x44*/, 0x00 /*0x45*/, 0x79 /*!!R_CTL!!*/, 0xC0 /*0x47*/, 0x40 /*0x48*/, 0x9E /*!!0x49!!*/, 0xD8 /*0x4A*/ }; RegWriteArray(this,R_ALL, 74, uchRegs2587); } /* #2587[065.4] */ INST_ASSERT(); RegWrite(this,R_STPS,2,cSteps); /* do some magic for slider acceleration */ if (cSteps>600) /* only large movements are accelerated */ { RegWrite(this,0x34, 1, 0xC3); RegWrite(this,0x47, 2, 0xA000); /* initial speed */ } /* start back or forth movement */ if (nDistance>0) { RegWrite(this,R_CTL, 1, 0x39); /* #2588[065.4] */ RegWrite(this,R_CTL, 1, 0x79); /* #2589[065.4] */ RegWrite(this,R_CTL, 1, 0xF9); /* #2590[065.4] */ } else { RegWrite(this,R_CTL, 1, 0x59); RegWrite(this,R_CTL, 1, 0xD9); } INST_ASSERT(); /* accelerate the slider each 100 us */ if (cSteps>600) { nRest=cSteps; for (nSpeed=0x9800; nRest>600 && nSpeed>=0x4000; nSpeed-=0x800) { nRest=RegRead(this,R_POS, 2); usleep(100); /* perhaps 40C0 is the fastest possible value */ RegWrite(this,0x47, 2, nSpeed>0x4000 ? nSpeed : 0x40C0); } } INST_ASSERT(); usleep(100); return WaitWhileBusy(this,100); }