4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
33 * \brief STM32F103xx I2C driver.
35 * \author Daniele Basile <asterix@develer.com>
38 #include "cfg/cfg_i2c.h"
40 #define LOG_LEVEL I2C_LOG_LEVEL
41 #define LOG_FORMAT I2C_LOG_FORMAT
44 #include <cfg/debug.h>
45 #include <cfg/macros.h> // BV()
46 #include <cfg/module.h>
51 * Send START condition on the bus.
53 * \return true on success, false otherwise.
55 static bool i2c_builtin_start(void)
63 * Send START condition and select slave for write.
64 * \c id is the device id comprehensive of address left shifted by 1.
65 * The LSB of \c id is ignored and reset to 0 for write operation.
67 * \return true on success, false otherwise.
69 bool i2c_builtin_start_w(uint8_t id)
76 * Send START condition and select slave for read.
77 * \c id is the device id comprehensive of address left shifted by 1.
78 * The LSB of \c id is ignored and set to 1 for read operation.
80 * \return true on success, false otherwise.
82 bool i2c_builtin_start_r(uint8_t id)
90 * Send STOP condition.
92 void i2c_builtin_stop(void)
99 * Put a single byte in master transmitter mode
100 * to the selected slave device through the TWI bus.
102 * \return true on success, false on error.
104 bool i2c_builtin_put(const uint8_t data)
111 * Get 1 byte from slave in master transmitter mode
112 * to the selected slave device through the TWI bus.
113 * If \a ack is true issue a ACK after getting the byte,
114 * otherwise a NACK is issued.
116 * \return the byte read if ok, EOF on errors.
118 int i2c_builtin_get(bool ack)
127 * Initialize TWI module.
129 void i2c_builtin_init(void)