1 /* 2 * Copyright (c) 2004-2007 Marcus Overhagen <marcus@overhagen.de> 3 * 4 * Permission is hereby granted, free of charge, to any person 5 * obtaining a copy of this software and associated documentation 6 * files (the "Software"), to deal in the Software without restriction, 7 * including without limitation the rights to use, copy, modify, 8 * merge, publish, distribute, sublicense, and/or sell copies of 9 * the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 #ifndef __I2C_CORE_H 26 #define __I2C_CORE_H 27 28 #include <SupportDefs.h> 29 30 typedef void (*i2c_set_scl)(void *cookie, int state); 31 typedef void (*i2c_set_sda)(void *cookie, int state); 32 typedef int (*i2c_get_scl)(void *cookie); 33 typedef int (*i2c_get_sda)(void *cookie); 34 35 struct _i2c_bus; 36 typedef struct _i2c_bus i2c_bus; 37 38 i2c_bus *i2c_create_bus(void *cookie, 39 int freqency, 40 bigtime_t timeout, 41 i2c_set_scl set_scl, 42 i2c_set_sda set_sda, 43 i2c_get_scl get_scl, 44 i2c_get_sda get_sda); 45 46 void i2c_delete_bus(i2c_bus *bus); 47 48 status_t i2c_read(i2c_bus *bus, int address, void *data, int size); 49 status_t i2c_write(i2c_bus *bus, int address, const void *data, int size); 50 51 status_t i2c_xfer(i2c_bus *bus, int address, 52 const void *write_data, int write_size, 53 void *read_data, int read_size); 54 55 #endif 56