84 lines
2.3 KiB
C
84 lines
2.3 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) 2007 by Jonathan Gordon
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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 "config.h"
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#include "spi.h"
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#include "rtc.h"
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#include "timefuncs.h"
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/* Choose one of: */
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#define ADDR_READ 0x04
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#define ADDR_WRITE 0x00
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/* and one of: */
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#define ADDR_ONE 0x08
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#define ADDR_BURST 0x00
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void rtc_init(void)
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{
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}
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int rtc_read_datetime(struct tm *tm)
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{
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unsigned int i;
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unsigned char buf[7];
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char command = ADDR_READ|ADDR_BURST; /* burst read from the start of the time/date reg */
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spi_block_transfer(SPI_target_RX5X348AB, &command, 1, buf, sizeof(buf));
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for (i = 0; i < sizeof(buf); i++)
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buf[i] = BCD2DEC(buf[i]);
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tm->tm_sec = buf[0];
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tm->tm_min = buf[1];
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tm->tm_hour = buf[2];
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tm->tm_mday = buf[4];
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tm->tm_mon = buf[5] - 1;
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tm->tm_year = buf[6] + 100;
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set_day_of_week(tm);
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set_day_of_year(tm);
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return 1;
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}
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int rtc_write_datetime(const struct tm *tm)
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{
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unsigned int i;
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char command = ADDR_WRITE|ADDR_BURST; /* burst read from the start of the time/date reg */
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unsigned char buf[8];
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buf[0] = command;
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buf[1] = tm->tm_sec;
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buf[2] = tm->tm_min;
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buf[3] = tm->tm_hour;
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buf[4] = tm->tm_wday;
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buf[5] = tm->tm_mday;
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buf[6] = tm->tm_mon + 1;
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buf[7] = tm->tm_year - 100;
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/* don't encode the comand byte */
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for (i = 1; i < sizeof(buf); i++)
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buf[i] = DEC2BCD(buf[i]);
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spi_block_transfer(SPI_target_RX5X348AB, buf, sizeof(buf), NULL, 0);
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return 1;
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}
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