77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
|
/* -------------------------------------------------------------------- */
|
||
|
|
/* 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 */
|