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77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
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/* -------------------------------------------------------------------- */
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/* i2c-pcf8584.h: PCF 8584 global defines */
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/* -------------------------------------------------------------------- */
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/* Copyright (C) 1996 Simon G. Vogl
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1999 Hans Berglund
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* -------------------------------------------------------------------- */
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/* With some changes from Frodo Looijaard <frodol@dds.nl> */
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#ifndef I2C_PCF8584_H
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#define I2C_PCF8584_H 1
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/* ----- Control register bits ---------------------------------------- */
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#define I2C_PCF_PIN 0x80
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#define I2C_PCF_ESO 0x40
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#define I2C_PCF_ES1 0x20
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#define I2C_PCF_ES2 0x10
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#define I2C_PCF_ENI 0x08
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#define I2C_PCF_STA 0x04
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#define I2C_PCF_STO 0x02
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#define I2C_PCF_ACK 0x01
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#define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
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#define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
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#define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
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#define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK)
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/* ----- Status register bits ----------------------------------------- */
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/*#define I2C_PCF_PIN 0x80 as above*/
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#define I2C_PCF_INI 0x40 /* 1 if not initialized */
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#define I2C_PCF_STS 0x20
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#define I2C_PCF_BER 0x10
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#define I2C_PCF_AD0 0x08
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#define I2C_PCF_LRB 0x08
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#define I2C_PCF_AAS 0x04
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#define I2C_PCF_LAB 0x02
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#define I2C_PCF_BB 0x01
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/* ----- Chip clock frequencies --------------------------------------- */
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#define I2C_PCF_CLK3 0x00
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#define I2C_PCF_CLK443 0x10
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#define I2C_PCF_CLK6 0x14
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#define I2C_PCF_CLK 0x18
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#define I2C_PCF_CLK12 0x1c
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/* ----- transmission frequencies ------------------------------------- */
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#define I2C_PCF_TRNS90 0x00 /* 90 kHz */
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#define I2C_PCF_TRNS45 0x01 /* 45 kHz */
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#define I2C_PCF_TRNS11 0x02 /* 11 kHz */
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#define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */
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/* ----- Access to internal registers according to ES1,ES2 ------------ */
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/* they are mapped to the data port ( a0 = 0 ) */
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/* available when ESO == 0 : */
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#define I2C_PCF_OWNADR 0
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#define I2C_PCF_INTREG I2C_PCF_ES2
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#define I2C_PCF_CLKREG I2C_PCF_ES1
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#endif /* I2C_PCF8584_H */
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