1 /* -------------------------------------------------------------------- */
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 1.3 2000/01/18 23:54:07 frodo 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
79
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