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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. */
/* -------------------------------------------------------------------- */
/* 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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