109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/**
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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 2007 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief PCF8574 i2c port expander driver.
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*
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* \author Francesco Sacchi <batt@develer.com>
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*
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* $WIZ$ module_name = "pcf8574"
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* $WIZ$ module_depends = "i2c"
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*/
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#ifndef DRV_PCF8574_H
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#define DRV_PCF8574_H
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#include "cfg/cfg_i2c.h"
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#include <cfg/compiler.h>
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#include <drv/i2c.h>
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#if COMPILER_C99
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#define pcf8574_init(...) PP_CAT(pcf8574_init ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
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#define pcf8574_get(...) PP_CAT(pcf8574_get ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
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#define pcf8574_put(...) PP_CAT(pcf8574_put ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
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#else
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#define pcf8574_init(args...) PP_CAT(pcf8574_init ## _, COUNT_PARMS(args)) (args)
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#define pcf8574_get(args...) PP_CAT(pcf8574_get ## _, COUNT_PARMS(args)) (args)
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#define pcf8574_put(args...) PP_CAT(pcf8574_put ## _, COUNT_PARMS(args)) (args)
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#endif
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typedef uint8_t pcf8574_addr;
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/**
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* Context for accessing a PCF8574.
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*/
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typedef struct Pcf8574
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{
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pcf8574_addr addr;
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} Pcf8574;
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#define PCF8574ID 0x40 ///< I2C address
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/**
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* Read PCF8574 \a pcf bit status.
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* \return the pins status or EOF on errors.
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*/
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int pcf8574_get_2(I2c *i2c, Pcf8574 *pcf);
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/**
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* Write to PCF8574 \a pcf port \a data.
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* \return true if ok, false on errors.
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*/
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bool pcf8574_put_3(I2c *i2c, Pcf8574 *pcf, uint8_t data);
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/**
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* Init a PCF8574 on the bus with addr \a addr.
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* \return true if device is found, false otherwise.
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*/
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bool pcf8574_init_3(I2c *i2c, Pcf8574 *pcf, pcf8574_addr addr);
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#if !CONFIG_I2C_DISABLE_OLD_API
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DEPRECATED INLINE int pcf8574_get_1(Pcf8574 *pcf)
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{
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return pcf8574_get_2(&local_i2c_old_api, pcf);
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}
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DEPRECATED INLINE bool pcf8574_put_2(Pcf8574 *pcf, uint8_t data)
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{
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return pcf8574_put_3(&local_i2c_old_api, pcf, data);
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}
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DEPRECATED INLINE bool pcf8574_init_2(Pcf8574 *pcf, pcf8574_addr addr)
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{
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return pcf8574_init_3(&local_i2c_old_api, pcf, addr);
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}
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#endif /* !CONFIG_I2C_DISABLE_OLD_API */
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#endif /* DRV_PCF8574_H */
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