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c/i2c.h

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00001 /* 
00002  * This file is part of AvrTherm.
00003  *
00004  * This program is free software; you can redistribute it and/or modify
00005  * it under the terms of the GNU General Public License as published
00006  * by the Free Software Foundation; either version 2 of the License, or
00007  * (at your option) any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00012  * See the GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017  *
00018  * Copyright (C) 2004 Andreas Schroeder <andreas@a-netz.de>
00019  */
00020 
00033 #ifndef I2C_H 
00034 #define I2C_H
00035 
00036 #include "globals.h"
00037 
00041 #define I2C_ACK     1
00042 
00046 #define I2C_NO_ACK  0
00047 
00053 #define I2C_MASK_WRITE  0xfe
00054 
00060 #define I2C_MASK_READ   0x01
00061 
00068 #define I2C_READ(ADDRESS) (ADDRESS | I2C_MASK_READ)
00069 
00076 #define I2C_WRITE(ADDRESS) (ADDRESS & I2C_MASK_WRITE)
00077 
00085 void i2c_init(void);
00086 
00090 void i2c_start(void);
00091 
00095 void i2c_stop(void);
00096 
00112 u08 i2c_send_byte(u08 data);
00113 
00114 
00121 u08 i2c_read_byte(void);
00122 
00126 void i2c_send_ack(u08 ack);
00127 
00128 #endif

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