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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 420 | giacomo | 1 | /* -------------------------------------------------------------------- */ |
| 2 | /* i2c-pcf8584.h: PCF 8584 global defines */ |
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| 3 | /* -------------------------------------------------------------------- */ |
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| 4 | /* Copyright (C) 1996 Simon G. Vogl |
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| 5 | 1999 Hans Berglund |
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| 6 | |||
| 7 | This program is free software; you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation; either version 2 of the License, or |
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| 10 | (at your option) any later version. |
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| 11 | |||
| 12 | This program is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |||
| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with this program; if not, write to the Free Software |
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| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
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| 20 | /* -------------------------------------------------------------------- */ |
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| 21 | |||
| 22 | /* With some changes from Frodo Looijaard <frodol@dds.nl> */ |
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| 23 | |||
| 24 | /* $Id: i2c-algo-pcf.h,v 1.1 2004-01-28 15:12:03 giacomo Exp $ */ |
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| 25 | |||
| 26 | #ifndef I2C_PCF8584_H |
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| 27 | #define I2C_PCF8584_H 1 |
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| 28 | |||
| 29 | /* ----- Control register bits ---------------------------------------- */ |
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| 30 | #define I2C_PCF_PIN 0x80 |
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| 31 | #define I2C_PCF_ESO 0x40 |
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| 32 | #define I2C_PCF_ES1 0x20 |
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| 33 | #define I2C_PCF_ES2 0x10 |
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| 34 | #define I2C_PCF_ENI 0x08 |
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| 35 | #define I2C_PCF_STA 0x04 |
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| 36 | #define I2C_PCF_STO 0x02 |
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| 37 | #define I2C_PCF_ACK 0x01 |
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| 38 | |||
| 39 | #define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) |
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| 40 | #define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK) |
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| 41 | #define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) |
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| 42 | #define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK) |
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| 43 | |||
| 44 | /* ----- Status register bits ----------------------------------------- */ |
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| 45 | /*#define I2C_PCF_PIN 0x80 as above*/ |
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| 46 | |||
| 47 | #define I2C_PCF_INI 0x40 /* 1 if not initialized */ |
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| 48 | #define I2C_PCF_STS 0x20 |
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| 49 | #define I2C_PCF_BER 0x10 |
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| 50 | #define I2C_PCF_AD0 0x08 |
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| 51 | #define I2C_PCF_LRB 0x08 |
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| 52 | #define I2C_PCF_AAS 0x04 |
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| 53 | #define I2C_PCF_LAB 0x02 |
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| 54 | #define I2C_PCF_BB 0x01 |
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| 55 | |||
| 56 | /* ----- Chip clock frequencies --------------------------------------- */ |
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| 57 | #define I2C_PCF_CLK3 0x00 |
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| 58 | #define I2C_PCF_CLK443 0x10 |
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| 59 | #define I2C_PCF_CLK6 0x14 |
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| 60 | #define I2C_PCF_CLK 0x18 |
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| 61 | #define I2C_PCF_CLK12 0x1c |
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| 62 | |||
| 63 | /* ----- transmission frequencies ------------------------------------- */ |
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| 64 | #define I2C_PCF_TRNS90 0x00 /* 90 kHz */ |
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| 65 | #define I2C_PCF_TRNS45 0x01 /* 45 kHz */ |
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| 66 | #define I2C_PCF_TRNS11 0x02 /* 11 kHz */ |
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| 67 | #define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */ |
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| 68 | |||
| 69 | |||
| 70 | /* ----- Access to internal registers according to ES1,ES2 ------------ */ |
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| 71 | /* they are mapped to the data port ( a0 = 0 ) */ |
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| 72 | /* available when ESO == 0 : */ |
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| 73 | |||
| 74 | #define I2C_PCF_OWNADR 0 |
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| 75 | #define I2C_PCF_INTREG I2C_PCF_ES2 |
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| 76 | #define I2C_PCF_CLKREG I2C_PCF_ES1 |
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| 77 | |||
| 78 | #endif /* I2C_PCF8584_H */ |