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 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 20 MA 02110-1301 USA. */ 21 /* -------------------------------------------------------------------- */ 22 23 /* With some changes from Frodo Looijaard <frodol@dds.nl> */ 24 25 #ifndef I2C_PCF8584_H 26 #define I2C_PCF8584_H 1 27 28 /* ----- Control register bits ---------------------------------------- */ 29 #define I2C_PCF_PIN 0x80 30 #define I2C_PCF_ESO 0x40 31 #define I2C_PCF_ES1 0x20 32 #define I2C_PCF_ES2 0x10 33 #define I2C_PCF_ENI 0x08 34 #define I2C_PCF_STA 0x04 35 #define I2C_PCF_STO 0x02 36 #define I2C_PCF_ACK 0x01 37 38 #define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) 39 #define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK) 40 #define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) 41 #define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK) 42 43 /* ----- Status register bits ----------------------------------------- */ 44 /*#define I2C_PCF_PIN 0x80 as above*/ 45 46 #define I2C_PCF_INI 0x40 /* 1 if not initialized */ 47 #define I2C_PCF_STS 0x20 48 #define I2C_PCF_BER 0x10 49 #define I2C_PCF_AD0 0x08 50 #define I2C_PCF_LRB 0x08 51 #define I2C_PCF_AAS 0x04 52 #define I2C_PCF_LAB 0x02 53 #define I2C_PCF_BB 0x01 54 55 /* ----- Chip clock frequencies --------------------------------------- */ 56 #define I2C_PCF_CLK3 0x00 57 #define I2C_PCF_CLK443 0x10 58 #define I2C_PCF_CLK6 0x14 59 #define I2C_PCF_CLK 0x18 60 #define I2C_PCF_CLK12 0x1c 61 62 /* ----- transmission frequencies ------------------------------------- */ 63 #define I2C_PCF_TRNS90 0x00 /* 90 kHz */ 64 #define I2C_PCF_TRNS45 0x01 /* 45 kHz */ 65 #define I2C_PCF_TRNS11 0x02 /* 11 kHz */ 66 #define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */ 67 68 69 /* ----- Access to internal registers according to ES1,ES2 ------------ */ 70 /* they are mapped to the data port ( a0 = 0 ) */ 71 /* available when ESO == 0 : */ 72 73 #define I2C_PCF_OWNADR 0 74 #define I2C_PCF_INTREG I2C_PCF_ES2 75 #define I2C_PCF_CLKREG I2C_PCF_ES1 76 77 #endif /* I2C_PCF8584_H */ 78