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#ifndef __HPSJ5S_MIDDLE_LEVEL_API_HEADER__
#define __HPSJ5S_MIDDLE_LEVEL_API_HEADER__
#include <ieee1284.h>
/*Scanner hardware registers*/
#define REGISTER_FUNCTION_CODE 0x70 /*Here goes function code */
#define REGISTER_FUNCTION_PARAMETER 0x60 /*Here goes function param */
#define ADDRESS_RESULT 0x20 /*Here we get result */
/*Scanner functions (not all - some of them I can't identify)*/
#define FUNCTION_SETUP_HARDWARE 0xA0
/*Scanner hardware control flags:*/
/*Set this flag and non-zero speed to start rotation*/
#define FLAGS_HW_MOTOR_READY 0x1
/*Set this flag to turn on lamp*/
#define FLAGS_HW_LAMP_ON 0x2
/*Set this flag to turn indicator lamp off*/
#define FLAGS_HW_INDICATOR_OFF 0x4
/*
Types:
*/
/*Color modes we support: 1-bit Drawing, 2-bit Halftone, 8-bit Gray Scale, 24-bt True Color*/
typedef enum
{ Drawing, Halftone, GrayScale, TrueColor }
enumColorDepth;
/*Middle-level API:*/
static int OpenScanner (const char *scanner_path);
static void CloseScanner (int handle);
static int DetectScanner (void);
static void StandByScanner (void);
static void SwitchHardwareState (SANE_Byte mask, SANE_Byte invert_mask);
static int CheckPaperPresent (void);
static int ReleasePaper (void);
static int PaperFeed (SANE_Word wLinesToFeed);
static void TransferScanParameters (enumColorDepth enColor,
SANE_Word wResolution,
SANE_Word wCorrectedLength);
static void TurnOnPaperPulling (enumColorDepth enColor,
SANE_Word wResolution);
static void TurnOffPaperPulling (void);
static SANE_Byte GetCalibration (void);
static void CalibrateScanElements (void);
/*Internal-use functions:*/
static int OutputCheck (void);
static int InputCheck (void);
static int CallCheck (void);
static void LoadingPaletteToScanner (void);
/*Low level warappers:*/
static void WriteAddress (SANE_Byte Address);
static void WriteData (SANE_Byte Data);
static void WriteScannerRegister (SANE_Byte Address, SANE_Byte Data);
static void CallFunctionWithParameter (SANE_Byte Function,
SANE_Byte Parameter);
static SANE_Byte CallFunctionWithRetVal (SANE_Byte Function);
static SANE_Byte ReadDataByte (void);
static void ReadDataBlock (SANE_Byte * Buffer, int length);
/*Daisy chaining API: (should be moved to ieee1284 library in future)*/
/*Deselect all devices in chain on this port.*/
static void daisy_deselect_all (struct parport *port);
/*Select device with number 'daisy' in 'mode'.*/
static int daisy_select (struct parport *port, int daisy, int mode);
/*Setup address for device in chain on this port*/
static int assign_addr (struct parport *port, int daisy);
/* Send a daisy-chain-style CPP command packet. */
static int cpp_daisy (struct parport *port, int cmd);
#endif
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