/** * \file * <!-- * This file is part of BeRTOS. * * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * As a special exception, you may use this file as part of a free software * library without restriction. Specifically, if other files instantiate * templates or use macros or inline functions from this file, or you compile * this file and link it with other files to produce an executable, this * file does not by itself cause the resulting executable to be covered by * the GNU General Public License. This exception does not however * invalidate any other reasons why the executable file might be covered by * the GNU General Public License. * * Copyright 2003, 2004, 2006, 2008 Develer S.r.l. (http://www.develer.com/) * Copyright 2000 Bernie Innocenti <bernie@codewiz.org> * All Rights Reserved. * --> * * \brief Macro for I2C bitbang operation. * * * * \author Francesco Sacchi <batt@develer.com> */ #ifndef HW_I2C_BITBANG_H #define HW_I2C_BITBANG_H #warning TODO:This is an example implementation, you must implement it! #define SDA_HI do { /* Implement me:Set SDA High by setting SDA pin as input */ } while (0) #define SDA_LO do { /* Implement me:Set SDA Low by setting SDA pin as open collector output */ } while (0) #define SCL_HI do { /* Implement me:Set SCL High by setting SCL pin as input */ } while (0) #define SCL_LO do { /* Implement me:Set SCL Low by setting SCL pin as open collector output */ } while (0) #define SCL_IN (true) /* Implement me: read SDA pin state */ #define SDA_IN (true) /* Implement me: read SCL pin state */ /** * This macro should set SDA and SCL lines as input. */ #define I2C_BITBANG_HW_INIT do { /* Implement me! */ } while (0) /** * Half bit delay routine used to generate the correct timings. */ #define I2C_HALFBIT_DELAY() do { /* Implement me! */ } while (0) /* * New api */ #include <cfg/compiler.h> INLINE void i2c_sdaHi(int dev) { (void)(dev); /* Implement me:Set SDA High by setting SDA pin as input */ } INLINE void i2c_sdaLo(int dev) { (void)(dev); /* Implement me:Set SDA Low by setting SDA pin as open collector output */ } INLINE void i2c_sclHi(int dev) { (void)(dev); /* Implement me:Set SCL High by setting SCL pin as input */ } INLINE void i2c_sclLo(int dev) { (void)(dev); /* Implement me:Set SCL Low by setting SCL pin as open collector output */ } INLINE bool i2c_sdaIn(int dev) { (void)(dev); /* Implement me: read SDA pin state */ return true; } INLINE bool i2c_sclIn(int dev) { (void)(dev); /* Implement me: read SCL pin state */ return true; } /** * Half bit delay routine used to generate the correct timings. */ INLINE void i2c_halfbitDelay(int dev) { (void)(dev); /* Implement me! */ } /** * This macro should set SDA and SCL lines as input. */ INLINE void i2c_bitbangInit(int dev) { (void)(dev); /* Implement me! */ } #endif /* HW_I2C_BITBANG_H */