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29 * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
33 * \brief I2C generic driver functions (interface).
36 * \author Francesco Sacchi <batt@develer.com>
41 #include "cfg/cfg_i2c.h"
42 #include <cfg/compiler.h>
44 #define I2C_READBIT BV(0)
50 #define I2C_BACKEND_BUILTIN 0 ///< Uses cpu builtin i2c driver
51 #define I2C_BACKEND_BITBANG 1 ///< Uses emulated bitbang driver
54 void i2c_builtin_init(void);
55 bool i2c_builtin_start_w(uint8_t id);
56 bool i2c_builtin_start_r(uint8_t id);
57 void i2c_builtin_stop(void);
58 bool i2c_builtin_put(uint8_t _data);
59 int i2c_builtin_get(bool ack);
61 void i2c_bitbang_init(void);
62 bool i2c_bitbang_start_w(uint8_t id);
63 bool i2c_bitbang_start_r(uint8_t id);
64 void i2c_bitbang_stop(void);
65 bool i2c_bitbang_put(uint8_t _data);
66 int i2c_bitbang_get(bool ack);
69 #if CONFIG_I2C_BACKEND == I2C_BACKEND_BUILTIN
70 #define i2c_init i2c_builtin_init
71 #define i2c_start_w i2c_builtin_start_w
72 #define i2c_start_r i2c_builtin_start_r
73 #define i2c_stop i2c_builtin_stop
74 #define i2c_put i2c_builtin_put
75 #define i2c_get i2c_builtin_get
76 #elif CONFIG_I2C_BACKEND == I2C_BACKEND_BITBANG
77 #define i2c_init i2c_bitbang_init
78 #define i2c_start_w i2c_bitbang_start_w
79 #define i2c_start_r i2c_bitbang_start_r
80 #define i2c_stop i2c_bitbang_stop
81 #define i2c_put i2c_bitbang_put
82 #define i2c_get i2c_bitbang_get
84 #error Unsupported i2c backend.
87 bool i2c_send(const void *_buf, size_t count);
88 bool i2c_recv(void *_buf, size_t count);