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- /* -------------------------------------------------------------------- */
- /* i2c-pcf8584.h: PCF 8584 global defines */
- /* -------------------------------------------------------------------- */
- /* Copyright (C) 1996 Simon G. Vogl
- 1999 Hans Berglund
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
- /* -------------------------------------------------------------------- */
- /* With some changes from Frodo Looijaard <frodol@dds.nl> */
- #ifndef I2C_PCF8584_H
- #define I2C_PCF8584_H 1
- /* ----- Control register bits ---------------------------------------- */
- #define I2C_PCF_PIN 0x80
- #define I2C_PCF_ESO 0x40
- #define I2C_PCF_ES1 0x20
- #define I2C_PCF_ES2 0x10
- #define I2C_PCF_ENI 0x08
- #define I2C_PCF_STA 0x04
- #define I2C_PCF_STO 0x02
- #define I2C_PCF_ACK 0x01
- #define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
- #define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
- #define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
- #define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK)
- /* ----- Status register bits ----------------------------------------- */
- /*#define I2C_PCF_PIN 0x80 as above*/
- #define I2C_PCF_INI 0x40 /* 1 if not initialized */
- #define I2C_PCF_STS 0x20
- #define I2C_PCF_BER 0x10
- #define I2C_PCF_AD0 0x08
- #define I2C_PCF_LRB 0x08
- #define I2C_PCF_AAS 0x04
- #define I2C_PCF_LAB 0x02
- #define I2C_PCF_BB 0x01
- /* ----- Chip clock frequencies --------------------------------------- */
- #define I2C_PCF_CLK3 0x00
- #define I2C_PCF_CLK443 0x10
- #define I2C_PCF_CLK6 0x14
- #define I2C_PCF_CLK 0x18
- #define I2C_PCF_CLK12 0x1c
- /* ----- transmission frequencies ------------------------------------- */
- #define I2C_PCF_TRNS90 0x00 /* 90 kHz */
- #define I2C_PCF_TRNS45 0x01 /* 45 kHz */
- #define I2C_PCF_TRNS11 0x02 /* 11 kHz */
- #define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */
- /* ----- Access to internal registers according to ES1,ES2 ------------ */
- /* they are mapped to the data port ( a0 = 0 ) */
- /* available when ESO == 0 : */
- #define I2C_PCF_OWNADR 0
- #define I2C_PCF_INTREG I2C_PCF_ES2
- #define I2C_PCF_CLKREG I2C_PCF_ES1
- #endif /* I2C_PCF8584_H */
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