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