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 18/* With some changes from Frodo Looijaard <frodol@dds.nl> */ 19 20#ifndef I2C_PCF8584_H 21#define I2C_PCF8584_H 1 22 23/* ----- Control register bits ---------------------------------------- */ 24#define I2C_PCF_PIN 0x80 25#define I2C_PCF_ESO 0x40 26#define I2C_PCF_ES1 0x20 27#define I2C_PCF_ES2 0x10 28#define I2C_PCF_ENI 0x08 29#define I2C_PCF_STA 0x04 30#define I2C_PCF_STO 0x02 31#define I2C_PCF_ACK 0x01 32 33#define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) 34#define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK) 35#define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) 36#define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK) 37 38/* ----- Status register bits ----------------------------------------- */ 39/*#define I2C_PCF_PIN 0x80 as above*/ 40 41#define I2C_PCF_INI 0x40 /* 1 if not initialized */ 42#define I2C_PCF_STS 0x20 43#define I2C_PCF_BER 0x10 44#define I2C_PCF_AD0 0x08 45#define I2C_PCF_LRB 0x08 46#define I2C_PCF_AAS 0x04 47#define I2C_PCF_LAB 0x02 48#define I2C_PCF_BB 0x01 49 50/* ----- Chip clock frequencies --------------------------------------- */ 51#define I2C_PCF_CLK3 0x00 52#define I2C_PCF_CLK443 0x10 53#define I2C_PCF_CLK6 0x14 54#define I2C_PCF_CLK 0x18 55#define I2C_PCF_CLK12 0x1c 56 57/* ----- transmission frequencies ------------------------------------- */ 58#define I2C_PCF_TRNS90 0x00 /* 90 kHz */ 59#define I2C_PCF_TRNS45 0x01 /* 45 kHz */ 60#define I2C_PCF_TRNS11 0x02 /* 11 kHz */ 61#define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */ 62 63 64/* ----- Access to internal registers according to ES1,ES2 ------------ */ 65/* they are mapped to the data port ( a0 = 0 ) */ 66/* available when ESO == 0 : */ 67 68#define I2C_PCF_OWNADR 0 69#define I2C_PCF_INTREG I2C_PCF_ES2 70#define I2C_PCF_CLKREG I2C_PCF_ES1 71 72#endif /* I2C_PCF8584_H */ 73