OpenCores
URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [i2c/] [i2c-pcf8584.h] - Blame information for rev 1765

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 1275 phoenix
/* -------------------------------------------------------------------- */
2
/* i2c-pcf8584.h: PCF 8584 global defines                               */
3
/* -------------------------------------------------------------------- */
4
/*   Copyright (C) 1996 Simon G. Vogl
5
                   1999 Hans Berglund
6
 
7
    This program is free software; you can redistribute it and/or modify
8
    it under the terms of the GNU General Public License as published by
9
    the Free Software Foundation; either version 2 of the License, or
10
    (at your option) any later version.
11
 
12
    This program is distributed in the hope that it will be useful,
13
    but WITHOUT ANY WARRANTY; without even the implied warranty of
14
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
    GNU General Public License for more details.
16
 
17
    You should have received a copy of the GNU General Public License
18
    along with this program; if not, write to the Free Software
19
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.           */
20
/* -------------------------------------------------------------------- */
21
 
22
/* With some changes from Frodo Looijaard <frodol@dds.nl> */
23
 
24
/* $Id: i2c-pcf8584.h,v 1.1.1.1 2004-04-15 01:38:32 phoenix Exp $ */
25
 
26
#ifndef I2C_PCF8584_H
27
#define I2C_PCF8584_H 1
28
 
29
/* ----- Control register bits ---------------------------------------- */
30
#define I2C_PCF_PIN     0x80
31
#define I2C_PCF_ESO     0x40
32
#define I2C_PCF_ES1     0x20
33
#define I2C_PCF_ES2     0x10
34
#define I2C_PCF_ENI     0x08
35
#define I2C_PCF_STA     0x04
36
#define I2C_PCF_STO     0x02
37
#define I2C_PCF_ACK     0x01
38
 
39
#define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
40
#define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
41
#define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
42
#define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)
43
 
44
/* ----- Status register bits ----------------------------------------- */
45
/*#define I2C_PCF_PIN  0x80    as above*/
46
 
47
#define I2C_PCF_INI 0x40   /* 1 if not initialized */
48
#define I2C_PCF_STS 0x20
49
#define I2C_PCF_BER 0x10
50
#define I2C_PCF_AD0 0x08
51
#define I2C_PCF_LRB 0x08
52
#define I2C_PCF_AAS 0x04
53
#define I2C_PCF_LAB 0x02
54
#define I2C_PCF_BB  0x01
55
 
56
/* ----- Chip clock frequencies --------------------------------------- */
57
#define I2C_PCF_CLK3    0x00
58
#define I2C_PCF_CLK443  0x10
59
#define I2C_PCF_CLK6    0x14
60
#define I2C_PCF_CLK     0x18
61
#define I2C_PCF_CLK12   0x1c
62
 
63
/* ----- transmission frequencies ------------------------------------- */
64
#define I2C_PCF_TRNS90 0x00     /*  90 kHz */
65
#define I2C_PCF_TRNS45 0x01     /*  45 kHz */
66
#define I2C_PCF_TRNS11 0x02     /*  11 kHz */
67
#define I2C_PCF_TRNS15 0x03     /* 1.5 kHz */
68
 
69
 
70
/* ----- Access to internal registers according to ES1,ES2 ------------ */
71
/* they are mapped to the data port ( a0 = 0 )                          */
72
/* available when ESO == 0 :                                            */
73
 
74
#define I2C_PCF_OWNADR  0
75
#define I2C_PCF_INTREG  I2C_PCF_ES2
76
#define I2C_PCF_CLKREG  I2C_PCF_ES1
77
 
78
#endif /* I2C_PCF8584_H */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.