| /* -------------------------------------------------------------------- */ |
| /* 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 */ |