quack/main/adb.h

/*
 *  adb.h
 *  quack
 *
 *  Created by Michel DEPEIGE on 7/01/2021.
 *  Copyright (c) 2020 Michel DEPEIGE.
 *
 * 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, 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 (see the file COPYING); if not, write to the
 * Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
 *
 */

#ifndef ADB_H
#define ADB_H

/* prototypes */
void	adb_init(void);
void    adb_task_host(void *pvParameters);
void    adb_task_mouse(void *pvParameters);

void	adb_tx_cmd(unsigned char cmd);
void	adb_tx_data(uint16_t data);
void	adb_tx_listen(unsigned char cmd, uint16_t data);
void	adb_tx_reset(void);

/* defines */
#define RMT_RX_CHANNEL	RMT_CHANNEL_0
#define tskADB_PRIORITY 4

/* ADB timers */
#define	ADB_RESET	3000
#define ADB_0_LOW	65
#define ADB_0_HIGH	35
#define ADB_1_LOW	35
#define ADB_1_HIGH	65

/* Classic Apple Mouse Protocol bitmasks */
#define ADB_CMP_B1	(1<<15)
#define ADB_CMP_B2	(1<<7)
#define ADB_CMP_MX	(127<<0)
#define ADB_CMP_MY	(127<<8)

/* ADB commands values from 00591b.pdf page 16-17 */
#define ADB_TALK	0xC
#define ADB_LISTEN	0x8
#define ADB_FLUSH	0x1
#define ADB_REG0	0x0
#define ADB_REG3	0x3

/* Device addresses */
#define ADB_MOUSE	(3<<4)
#define ADB_TMP		(9<<4)

/* Various stuff */
#define ADB_B_UP	0
#define ADB_B_DOWN	1

#define ADB_H_ALL	0xff	// Handlers bitmask
#define ADB_H_C100	0x01	// Handler 1 (Classic @ 100cpi)
#define ADB_H_C200	0x02	// Handler 2 (Classic @ 200cpi)
#define ADB_H_MOVE	0xfe	// Move to another address

/* Host states */
#define ADB_S_PROBE		0x00
#define ADM_S_POLL		0x01
#define ADB_S_KEEP		0x08

#endif