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