| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id: rtc_as3514.c 12131 2007-01-27 20:48:48Z dan_a $ |
| * |
| * Copyright (C) 2007 by Jonathan Gordon |
| * |
| * 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 "config.h" |
| #include "spi.h" |
| #include "rtc.h" |
| #include <stdbool.h> |
| /* Choose one of: */ |
| #define ADDR_READ 0x04 |
| #define ADDR_WRITE 0x00 |
| /* and one of: */ |
| #define ADDR_ONE 0x08 |
| #define ADDR_BURST 0x00 |
| void rtc_init(void) |
| { |
| } |
| |
| int rtc_read_datetime(unsigned char* buf) |
| { |
| char command = ADDR_READ|ADDR_BURST; /* burst read from the start of the time/date reg */ |
| spi_block_transfer(SPI_target_RX5X348AB, |
| &command, 1, buf, 7); |
| return 1; |
| } |
| int rtc_write_datetime(unsigned char* buf) |
| { |
| char command = ADDR_WRITE|ADDR_BURST; /* burst read from the start of the time/date reg */ |
| char data[8]; |
| int i; |
| data[0] = command; |
| for (i=1;i<8;i++) |
| data[i] = buf[i-1]; |
| spi_block_transfer(SPI_target_RX5X348AB, |
| data, 8, NULL, 0); |
| return 1; |
| } |