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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2013 Andrew Ryabinin
*
* This program 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "i2c-rk27xx.h"
#include "pca9555.h"
#include "system.h"
static unsigned short pca9555_out_ports;
static unsigned short pca9555_config = 0xffff;
unsigned short pca9555_read_input(void)
{
unsigned short ret;
i2c_read(PCA9555_I2C_ADDR, PCA9555_IN_CMD, sizeof(ret), (void*)&ret);
return letoh16(ret);
}
unsigned short pca9555_read_output(void)
{
return pca9555_out_ports;
}
unsigned short pca9555_read_config(void)
{
return pca9555_config;
}
void pca9555_write_output(const unsigned short data, const unsigned short mask)
{
unsigned short le_data = htole16((data&mask) | (pca9555_out_ports&~(mask)));
i2c_write(PCA9555_I2C_ADDR, PCA9555_OUT_CMD, sizeof(le_data), (void*)&le_data);
pca9555_out_ports = letoh16(le_data);
}
void pca9555_write_config(const unsigned short data, const unsigned short mask)
{
unsigned short le_data = htole16((data&mask) | (pca9555_config&~(mask)));
i2c_write(PCA9555_I2C_ADDR, PCA9555_CFG_CMD, sizeof(le_data), (void*)&le_data);
pca9555_config = letoh16(le_data);
}
void pca9555_init(void)
{
pca9555_target_init();
}
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