/* $OpenBSD: m41t8xreg.h,v 1.3 2020/10/23 20:55:15 patrick Exp $ */ /* * Copyright (c) 2010 Miodrag Vallat. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * ST M41T8x serial access real time clock registers * * http://www.st.com/stonline/products/literature/ds/9074/m41t80.pdf */ /* * Note that register update will stop while accessing registers 0x00 to 0x07 * (without the clock stopping), so that the reader does not get false data. * Registers will be thawed after reading register 0x07, when the * autoincrementing read address reaches 0x08. * * Clock and alarm numerical values are stored in BCD. All other values are * stored in binary. */ #define M41T8X_HSEC 0x00 /* 1/100th of second */ #define M41T8X_SEC 0x01 /* second */ #define M41T8X_STOP 0x80 /* stop clock, bit 7 of above */ #define M41T8X_MIN 0x02 /* minute */ #define M41T8X_HR 0x03 /* hour */ #define M41T8X_CEB 0x80 /* century bit toggle enable */ #define M41T8X_CB 0x40 /* century bit */ #define M41T8X_DOW 0x04 /* day of week */ #define M41T8X_DOW_MASK 0x07 /* day of week bits */ #define M41T8X_DAY 0x05 /* day of month */ #define M41T8X_MON 0x06 /* month */ #define M41T8X_YEAR 0x07 /* year */ #define M41T8X_TOD_START 0x00 #define M41T8X_TOD_LENGTH 0x08 #define M41T8X_CTRL 0x08 /* control */ #define M41T8X_OUT 0x80 /* output level */ #define M41T8X_32KHZ 0x09 /* 32KHz oscillator control */ #define M41T8X_32KE 0x80 /* 32KHz enable */ #define M41T8X_ALMON 0x0a /* alarm month */ #define M41T8X_AFE 0x80 /* alarm flag enable */ #define M41T8X_SQWE 0x40 /* square wave enable */ #define M41T8X_ALDAY 0x0b /* alarm day */ #define M41T8X_RPT4 0x80 /* alarm repeat mode bits */ #define M41T8X_RPT5 0x40 #define M41T8X_ALHOUR 0x0c /* alarm hour */ #define M41T8X_RPT3 0x80 #define M41T8X_ALMIN 0x0d /* alarm minute */ #define M41T8X_RPT2 0x80 #define M41T8X_ALSEC 0x0e /* alarm second */ #define M41T8X_RPT1 0x80 #define M41T8X_FLAGS 0x0f /* flags */ #define M41T8X_AF 0x40 /* alarm flag */ #define M41T8X_SQW 0x13 /* square wave control */ #define M41T8X_RS3 0x80 /* square wave frequency */ #define M41T8X_RS2 0x40 #define M41T8X_RS1 0x20 #define M41T8X_RS0 0x10 /* alarm repeat settings, RPT5..RPT1 */ #define M41T8X_ALREP_SEC 0x1f /* once per second */ #define M41T8X_ALREP_MIN 0x1e /* once per minute */ #define M41T8X_ALREP_HOUR 0x1c /* once per hour */ #define M41T8X_ALREP_DAY 0x18 /* once per day */ #define M41T8X_ALREP_MON 0x10 /* once per month */ #define M41T8X_ALREP_YEAR 0x00 /* once per year */ /* square wave frequency, RS3..RS0 */ #define M41T8X_SQW_32K 0x01 #define M41T8X_SQW_8K 0x02 #define M41T8X_SQW_4K 0x03 #define M41T8X_SQW_2K 0x04 #define M41T8X_SQW_1K 0x05 #define M41T8X_SQW_512 0x06 #define M41T8X_SQW_256 0x07 #define M41T8X_SQW_128 0x08 #define M41T8X_SQW_64 0x09 #define M41T8X_SQW_32 0x0a #define M41T8X_SQW_16 0x0b #define M41T8X_SQW_8 0x0c #define M41T8X_SQW_4 0x0d #define M41T8X_SQW_2 0x0e #define M41T8X_SQW_1 0x0f
