/* Hey EMACS -*- linux-c -*- */
/* $Id: packets.h 1397 2005-07-20 10:55:03Z roms $ */

/*  libticalcs - Ti Calculator library, a part of the TiLP project
 *  Copyright (C) 1999-2004  Romain Lievin
 *
 *  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.
 */

#ifndef __CALCS_PACKETS__
#define __CALCS_PACKETS__


/*************/
/* Constants */
/*************/

// Machine IDs (host <-> target)

#define PC_TIXX  0x00

#define PC_TI73  0x07
#define TI73_PC  0x74

#define PC_TI82  0x02
#define TI82_PC  0x82

#define PC_TI83  0x03
#define TI83_PC  0x83

#define PC_TI83p 0x23
#define TI83p_PC 0x73


#define PC_TI84p 0x23

#define TI84p_PC 0x73

#define PC_TI85  0x05
#define TI85_PC  0x85

#define PC_TI86  0x06
#define TI86_PC  0x86

#define PC_TI89  0x08
#define TI89_PC  0x98


#define PC_TI89t 0x08

#define TI89t_PC 0x98

#define PC_TI92  0x09
#define TI92_PC  0x89

#define PC_TI92p 0x08
#define TI92p_PC 0x88

#define PC_V200  0x08
#define V200_PC  0x88

// Command IDs
/*
 * means there is data attached.
 # means the device id is ignored with this command.
 $ means it's a silent command
*/
#define CMD_VAR  0x06		// [*  ] Variable Header - includes a std variable header
#define CMD_CTS  0x09		// [   ] Continue - used to signal OK to send a variable
#define CMD_XDP  0x15		// [*  ] Data packet - Pure data
#define CMD_FLSH 0x2D		// [  $] Send a FLASH application
#define CMD_SKIP 0x36		// [*  ] Skip/Exit - used when duplicate name is found
#define CMD_SID  0x47		// [*#$] Send calc ID
#define CMD_ACK  0x56		// [   ] Acknowledge
#define CMD_ERR  0x5A		// [   ] Checksum error: send last packet again
#define CMD_RDY  0x68		// [ #$] Test if calc is ready
#define CMD_SCR  0x6D		// [  $] Request screenshot
#define CMD_RID  0x74		// [ #$] Request calc ID
#define CMD_CONT 0x78		// [  $] Continue
#define CMD_KEY  0x87		// [  $] Send key
#define CMD_EOT  0x92		// [   ] End Of Transmission: no more variables to send
#define CMD_REQ  0xA2		// [* $] Request variable - includes a std var header
#define CMD_IND  0xB7		// [* $] Request variable index
#define CMD_RTS  0xC9		// [* $] Request to send - includes a padded var header

// Rejection codes (CMD82_SKIP)

#define REJ_EXIT     1
#define REJ_SKIP     2
#define REJ_MEMORY   3

/*************/
/* Functions */
/*************/

int send_packet(uint8_t target, uint8_t cmd, uint16_t length,
		uint8_t * data);
int recv_packet(uint8_t * host, uint8_t * cmd, uint16_t * length,
		uint8_t * data);

void pad_buffer(uint8_t* varname, uint8_t value);

#ifndef WORDS_BIGENDIAN
# define fixup(x) (x &= 0x0000ffff)
#else
# define fixup(x) (x >>= 16)
#endif /* !G_BIG_ENDIAN */
#endif