| 0,0 → 1,109 |
|---|
| /* |
| * Copyright (C) 2004 Darren Hutchinson (dbh@gbdt.com.au) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Library 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 Library General Public |
| * License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this software; see the file COPYING. If not, write to |
| * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| * MA 02111-1307, USA. |
| * |
| * $Id: paddle.h,v 1.2 2004/03/03 07:37:11 dbh Exp $ |
| */ |
| |
| #ifndef _PADDLE_H_ |
| #define _PADDLE_H_ |
| |
| /* This file describes the data in the EQ6/Atlas hand paddle serial stream. |
| * |
| * This is a one-directional serial stream at 935 bits/sec. This is a fairly |
| * wierd speed that seems to be used to give an overall serial stream time |
| * of 76.2ms [basically the full-step time for siderial rate, which is |
| * half of the actual half-step rate]. |
| * |
| * See the file eq6-serial.txt for further details. |
| */ |
| #include <inttypes.h> |
| |
| /* Define the serial rate used by the paddle |
| */ |
| #define PADDLE_RATE 935L /* Bit rate for the paddle */ |
| |
| /* The serial stream is a set of 6, 9 bit words. The first three words |
| * are for RA control, the second three words are for DEC control. |
| * |
| * Note that the ordering here is arbitary (through reverse engineering), but |
| * seems sensible. |
| * |
| * Word1: RA sync (B8 = 0) |
| * Word2: RA direction (B8 = 0) |
| * Word3: RA speed (B8 = 0) |
| * Word4: ??? (Assumed to be DEC sync) (B8 = 1) |
| * Word5: DEC direction (B8 = 1) |
| * Word6: DEC speed (B8 = 1) |
| * |
| */ |
| |
| /* Word #1 - RA SYNC |
| */ |
| #define RA_SYNC 0x7e |
| |
| /* Word #2 - RA DIRECTION |
| */ |
| #define RA_DIR_BIT 0 // RA Direction bit |
| #define RA_DIR_LEFT 0 |
| #define RA_DIR_RIGHT (1 << RA_DIR_BIT) |
| |
| /* Note: Will be 0 for southern hemispere siderial, 1 for northern siderial |
| */ |
| |
| |
| /* Word #3 - RA SPEED |
| */ |
| #define RA_SPEED_MASK 0x0f // Speed bits |
| #define RA_SPEED_0 0x00 // x2, opposite direction to siderial |
| #define RA_SPEED_1 0x01 // No RA button pressed |
| #define RA_SPEED_2 0x02 // x2, same direction as siderial |
| #define RA_SPEED_8 0x04 // siderial x8 |
| #define RA_SPEED_16 0x08 // siderial x16 |
| |
| /* Word #4 - ???. This word always seems to be zero. Assume it's a sync word |
| * unless we hear something different |
| */ |
| #define DEC_SYNC 0x00 |
| |
| /* Word #5 - DEC DIRECTION |
| */ |
| #define DEC_DIR_BIT 0 // DEC Direction bit |
| #define DEC_DIR_UP 0 |
| #define DEC_DIR_DOWN (1 << DEC_DIR_BIT) |
| |
| /* Word #6 - DEC SPEED |
| */ |
| #define DEC_SPEED_MASK 0x0f // Speed bits |
| #define DEC_SPEED_0 0x00 // No buttons pressed |
| #define DEC_SPEED_2 0x02 // siderial x2 |
| #define DEC_SPEED_8 0x04 // siderial x8 |
| #define DEC_SPEED_16 0x08 // siderial x16 |
| |
| /* Prototypes for paddle.c functions that can be called from outside |
| */ |
| extern void paddleInit(void); |
| |
| extern uint8_t paddleDecRate; |
| extern uint8_t paddleRaRate; |
| extern uint8_t siderialRate; |
| |
| /* Configuration variable - sets whether the 2X rate for the paddle should |
| * be considered as 1X or 0.3X |
| */ |
| extern uint8_t paddleGuideRate; |
| #endif /* _PADDLE_H_ */ |