128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2003, 2004, 2006, 2008 Develer S.r.l. (http://www.develer.com/)
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* Copyright 2000 Bernie Innocenti <bernie@codewiz.org>
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* All Rights Reserved.
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* -->
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*
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* \brief Macro for I2C bitbang operation.
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*
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*
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*
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* \author Francesco Sacchi <batt@develer.com>
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*/
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#ifndef HW_I2C_BITBANG_H
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#define HW_I2C_BITBANG_H
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#warning TODO:This is an example implementation, you must implement it!
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#define SDA_HI do { /* Implement me:Set SDA High by setting SDA pin as input */ } while (0)
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#define SDA_LO do { /* Implement me:Set SDA Low by setting SDA pin as open collector output */ } while (0)
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#define SCL_HI do { /* Implement me:Set SCL High by setting SCL pin as input */ } while (0)
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#define SCL_LO do { /* Implement me:Set SCL Low by setting SCL pin as open collector output */ } while (0)
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#define SCL_IN (true) /* Implement me: read SDA pin state */
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#define SDA_IN (true) /* Implement me: read SCL pin state */
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/**
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* This macro should set SDA and SCL lines as input.
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*/
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#define I2C_BITBANG_HW_INIT do { /* Implement me! */ } while (0)
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/**
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* Half bit delay routine used to generate the correct timings.
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*/
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#define I2C_HALFBIT_DELAY() do { /* Implement me! */ } while (0)
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/*
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* New api
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*/
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#include <cfg/compiler.h>
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INLINE void i2c_sdaHi(int dev)
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{
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(void)(dev);
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/* Implement me:Set SDA High by setting SDA pin as input */
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}
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INLINE void i2c_sdaLo(int dev)
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{
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(void)(dev);
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/* Implement me:Set SDA Low by setting SDA pin as open collector output */
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}
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INLINE void i2c_sclHi(int dev)
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{
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(void)(dev);
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/* Implement me:Set SCL High by setting SCL pin as input */
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}
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INLINE void i2c_sclLo(int dev)
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{
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(void)(dev);
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/* Implement me:Set SCL Low by setting SCL pin as open collector output */
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}
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INLINE bool i2c_sdaIn(int dev)
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{
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(void)(dev);
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/* Implement me: read SDA pin state */
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return true;
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}
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INLINE bool i2c_sclIn(int dev)
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{
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(void)(dev);
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/* Implement me: read SCL pin state */
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return true;
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}
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/**
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* Half bit delay routine used to generate the correct timings.
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*/
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INLINE void i2c_halfbitDelay(int dev)
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{
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(void)(dev);
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/* Implement me! */
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}
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/**
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* This macro should set SDA and SCL lines as input.
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*/
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INLINE void i2c_bitbangInit(int dev)
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{
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(void)(dev);
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/* Implement me! */
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}
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#endif /* HW_I2C_BITBANG_H */
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