/*
*-------------------------------------------------------------------------------
*--  RCSId: $Id: level2.h,v 1.50 2005-04-12 14:54:27+02 mjg Exp mjg $
*--         $Name:  $
*-------------------------------------------------------------------------------
*-- level2.c - Low level data transforming header file
*-------------------------------------------------------------------------------
*-- $Log: level2.h,v $*-- Revision 1.50  2005-04-12 14:54:27+02  mjg*-- switch to normal mode*--*-- Revision 1.49  2005-03-21 17:01:04+01  mjg*-- Uplink timing tuned*--*-- Revision 1.47  2005-02-28 13:35:30+01  mjg*-- EM4006 uid crc check*--*-- Revision 1.46  2005-02-25 11:23:13+01  mjg*-- EM4006 extraction routine, no crc check*--*-- Revision 1.45  2005-02-25 11:19:41+01  mjg*-- EM4006 extraction routine, no crc check*--
*-- Revision 1.44  2005-02-25 09:12:49+01  mjg
*-- EM4006 decode mode
*--
*-- Revision 1.43  2005-02-23 16:04:15+01  mjg
*-- EM4006 raw mode, not tested
*--
*-- Revision 1.42  2005-02-21 18:13:55+01  mjg
*-- hubneme IV
*--
*-- Revision 1.41  2005-02-21 10:56:31+01  mjg
*-- hubneme III
*--
*-- Revision 1.40  2005-02-21 10:47:42+01  mjg
*-- hubneme III
*--
*-- Revision 1.39  2005-02-21 10:45:25+01  mjg
*-- hubneme III
*--
*-- Revision 1.38  2005-01-19 15:53:51+01  mjg
*-- EM4034 EAS off support corrected
*--
*-- Revision 1.37  2004-12-13 08:49:33+01  mjg
*-- compiler sensitive code in HWTransaction
*--
*-- Revision 1.36  2004-12-07 17:22:17+01  mjg
*-- version 4 of 1TS ready
*--
*-- Revision 1.35  2004-12-07 15:22:21+01  mjg
*-- 1.33 strikes back!
*--
*-- Revision 1.33  2004-06-30 12:47:41+02  mjg
*-- key selection extension
*--
*-- Revision 1.32  2004-05-31 16:41:51+02  mjg
*-- single carrier too slow caused CRC errors, speeded up
*--
*-- Revision 1.31  2004-05-21 09:29:37+02  mjg
*-- startup inventory, to toggle EAS off for EM4034
*--
*-- Revision 1.30  2004-05-10 09:23:28+02  mjg
*-- to toggle EAS off
*--
*-- Revision 1.29  2004-05-07 08:10:25+02  mjg
*-- HW auth passed
*--
*-- Revision 1.28  2004-04-27 17:05:44+02  mjg
*-- to better test the design
*--
*-- Revision 1.27  2004-04-21 15:48:47+02  mjg
*-- FSK low data rate support
*--
*-- Revision 1.26  2004-04-21 13:05:21+02  mjg
*-- EOF ignored because of FSK and 4034 support
*--
*-- Revision 1.25  2004-04-13 11:21:39+02  mjg
*-- sync
*--
*-- Revision 1.24  2004-03-25 16:09:19+01  mjg
*-- to add delayed EOF feature
*--
*-- Revision 1.23  2004-03-25 15:13:23+01  mjg
*-- to add delayed EOF feature
*--
*-- Revision 1.22  2004-03-24 13:35:36+01  mjg
*-- error msg needs better handling
*--
*-- Revision 1.21  2004-03-15 16:59:06+01  mjg
*-- to check SPI
*--
*-- Revision 1.20  2004-02-16 08:04:11+01  mjg
*-- preliminary CD
*--
*-- Revision 1.18  2004-02-10 19:24:40+01  mjg
*-- FSK to add valid bits
*--
*-- Revision 1.17  2004-02-10 18:30:46+01  mjg
*-- dual carrier raw, decoded 1st try
*--
*-- Revision 1.16  2004-02-09 18:03:33+01  mjg
*-- raw dual carrier capture
*--
*-- Revision 1.15  2004-02-08 12:30:52+01  mjg
*-- Decode var removed, FSK polling added
*--
*-- Revision 1.14  2004-02-07 14:59:47+01  mjg
*-- Response parsing correction
*--
*-- Revision 1.13  2004-02-03 08:42:52+01  mjg
*-- hubneme II
*--
*-- Revision 1.12  2004-02-03 07:24:37+01  mjg
*-- fwd debug implemented and removed from being compiled
*--
*-- Revision 1.11  2004-01-19 14:08:05+01  mjg
*-- hubneme I
*--
*-- Revision 1.9  2003-12-11 17:37:20+01  mjg
*-- yes
*--
*-- Revision 1.8  2003-12-11 16:33:41+01  mjg
*-- 1TS gives too much responses, stayquiet ?
*--
*-- Revision 1.7  2003-12-10 08:15:48+01  mjg
*-- to add dbg code
*--
*-- Revision 1.6  2003-12-09 12:43:01+01  mjg
*-- to 1TS inventory
*--
*-- Revision 1.4  2003-12-09 12:42:44+01  mjg
*-- to 1TS inventory
*--
*-- Revision 1.3  2003-12-05 08:38:56+01  mjg
*-- write update
*--
*-- Revision 1.2  2003-12-04 15:58:08+01  mjg
*-- to write
*--
*-- Revision 1.1  2003-12-01 08:18:04+01  mjg
*-- single carrier low drate level1 ok
*--
*-- Revision 1.0  2003-11-26 09:01:03+01  mjg
*-- Initial revision
*--
*-------------------------------------------------------------------------------
*/

#ifndef __LEVEL2__
#define __LEVEL2__

//constants----------------------------------------------------------

#define MAXTRELAX   0                       //increase this value to increase max capture time
#define CAPTURE_SIZE (128)                  //capture buffer length

//PORTB pin position
#define SDA_PIN     1
#define SDO_PIN     2

//PORTC pin position
#define MOD_PIN     0                     //DIN
#define DCLK_PIN    1                     //DCLK
#define LED_PIN     2
#define SCK_PIN     3

//PORTD pin position
#define DBG_FORWARD 2
#define DBG_TRANS   6
#define SSN_PIN     7

#define SetLEDOn() cbi( PORTC, LED_PIN )
#define SetLEDOff() sbi( PORTC, LED_PIN )

#define SetSSN() cbi( DDRD, SSN_PIN )
#define ResetSSN() sbi( DDRD, SSN_PIN )
#define SetSCK() cbi( DDRC, SCK_PIN )
#define ResetSCK() sbi( DDRC, SCK_PIN )
#define SetSDA() cbi( DDRB, SDA_PIN )
#define ResetSDA() sbi( DDRB, SDA_PIN )

//public variables---------------------------------------------------

extern uint8_t bufferClean;                    //flag for pre-cleaning

typedef struct TCAPTURE {
  uint8_t capture_data[CAPTURE_SIZE];          //captured and decoded data bits
  uint8_t capture_valid[CAPTURE_SIZE];         //their valid bits
} TCAPTURE;

extern struct TCAPTURE capture;

extern uint8_t * forward_ptr;                  //ptr for forward message preparation
extern uint8_t data_buffer[CAPTURE_SIZE];      //forward data XOR clean response data

#ifdef DEBUG
extern uint16_t solich;
extern uint16_t offset;
#endif

extern uint16_t fwd_delays[7];                 //delays array for forwardlink timing tuning


//function declarations----------------------------------------------

extern void SendForward(uint8_t fwd_bit_count); 
extern void SendEOF(void);
extern uint8_t Prepare_Data( uint8_t data );

extern void ClearCaptureBuffers(void);
extern void Capture(uint8_t);

extern uint8_t ExtractData( uint8_t size );
extern uint8_t Extract_EM4006( uint8_t size );

extern void WriteSPI(uint16_t low, uint16_t hi);
extern uint16_t CRC(uint8_t *data, uint8_t len);

extern void HWTransaction(uint8_t *data, uint8_t *dst, uint8_t len);
extern void HWSign(uint8_t *data, uint8_t *dst, uint8_t len);

#endif // __LEVEL2__