ide_lib.h

这是一个基于8255扩展端口的keil c51固件

/*
  Copyright (C) 2003 Bart Bilos <[e-mail]>.

  Adapted from original work by Paul Stoffregen.
  http://www.pjrc.com/tech/8051/ide/

  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.

*/


// 8255 control register settings for IDE
#define 	rd_ide_8255   	0x92
#define 	wr_ide_8255  	0x80
// IDE variables where each bit is located in the control port (port C)
#define		ide_a0_line 	0x01	//direct from 8255 to ide interface
#define		ide_a1_line 	0x02	//direct from 8255 to ide interface
#define		ide_a2_line 	0x04	//direct from 8255 to ide interface
#define		ide_cs0_line 	0x08	//inverter between 8255 and ide interface
#define		ide_cs1_line 	0x10	//inverter between 8255 and ide interface
#define		ide_wr_line 	0x20	//inverter between 8255 and ide interface
#define		ide_rd_line 	0x40	//inverter between 8255 and ide interface
#define		ide_rst_line 	0x80	//inverter between 8255 and ide interface
// IDE control line constants
#define		ide_data		ide_cs0_line
#define		ide_err			ide_cs0_line + ide_a0_line
#define		ide_sec_cnt		ide_cs0_line + ide_a1_line
#define		ide_sector		ide_cs0_line + ide_a1_line + ide_a0_line
#define		ide_cyl_lsb		ide_cs0_line + ide_a2_line
#define		ide_cyl_msb		ide_cs0_line + ide_a2_line + ide_a0_line
#define		ide_head		ide_cs0_line + ide_a2_line + ide_a1_line
#define		ide_command		ide_cs0_line + ide_a2_line + ide_a1_line + ide_a0_line
#define		ide_status		ide_cs0_line + ide_a2_line + ide_a1_line + ide_a0_line
#define		ide_control		ide_cs1_line + ide_a2_line + ide_a1_line
#define		ide_astatus		ide_cs1_line + ide_a2_line + ide_a1_line + ide_a0_line
// IDE commands
#define		ide_cmd_recal	0x10
#define		ide_cmd_read	0x20
#define		ide_cmd_write	0x30
#define		ide_cmd_init	0x91
#define		ide_cmd_id		0xEC
#define		ide_cmd_spindown	0xE0
#define		ide_cmd_spinup	0xE1



void spinup(void);
void spindown(void);
char ide_busy(unsigned int a_timeout);
int ide_drq(unsigned int a_timeout);
void ide_init (void);
char get_err(void);
char read_sector(unsigned long int a_lba,char * a_buffer);
char write_sector(unsigned long int a_lba,char * a_buffer);
void wr_lba(unsigned long int a_lba);
void drive_id(char * a_buffer);
void read_data(char * a_buffer);
void write_data(char * a_buffer);
int ide_rd(char a_reg);
void ide_wr(char a_reg, int a_input);
void ide_hard_reset (void);