64 lines
2 KiB
C
64 lines
2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2013 Andrew Ryabinin
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "i2c-rk27xx.h"
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#include "pca9555.h"
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#include "system.h"
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static unsigned short pca9555_out_ports;
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static unsigned short pca9555_config = 0xffff;
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unsigned short pca9555_read_input(void)
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{
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unsigned short ret;
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i2c_read(PCA9555_I2C_ADDR, PCA9555_IN_CMD, sizeof(ret), (void*)&ret);
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return letoh16(ret);
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}
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unsigned short pca9555_read_output(void)
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{
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return pca9555_out_ports;
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}
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unsigned short pca9555_read_config(void)
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{
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return pca9555_config;
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}
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void pca9555_write_output(const unsigned short data, const unsigned short mask)
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{
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unsigned short le_data = htole16((data&mask) | (pca9555_out_ports&~(mask)));
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i2c_write(PCA9555_I2C_ADDR, PCA9555_OUT_CMD, sizeof(le_data), (void*)&le_data);
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pca9555_out_ports = letoh16(le_data);
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}
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void pca9555_write_config(const unsigned short data, const unsigned short mask)
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{
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unsigned short le_data = htole16((data&mask) | (pca9555_config&~(mask)));
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i2c_write(PCA9555_I2C_ADDR, PCA9555_CFG_CMD, sizeof(le_data), (void*)&le_data);
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pca9555_config = letoh16(le_data);
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}
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void pca9555_init(void)
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{
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pca9555_target_init();
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}
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