Akafugu / Mbed 2 deprecated vfd_modular_clock_mbed Featured

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   DipCortex-EEprom RTC flw mbed

RTC/ds1302.cpp@0:f6e68b4ce169, 2015-02-09 (annotated)

Committer:
Backstrom
Date:
Mon Feb 09 13:40:46 2015 +0000
Revision:
0:f6e68b4ce169
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Backstrom 0:f6e68b4ce169 1 /*
Backstrom 0:f6e68b4ce169 2 * VFD Modular Clock - mbed
Backstrom 0:f6e68b4ce169 3 * (C) 2011-14 Akafugu Corporation
Backstrom 0:f6e68b4ce169 4 *
Backstrom 0:f6e68b4ce169 5 * This program is free software; you can redistribute it and/or modify it under the
Backstrom 0:f6e68b4ce169 6 * terms of the GNU General Public License as published by the Free Software
Backstrom 0:f6e68b4ce169 7 * Foundation; either version 2 of the License, or (at your option) any later
Backstrom 0:f6e68b4ce169 8 * version.
Backstrom 0:f6e68b4ce169 9 *
Backstrom 0:f6e68b4ce169 10 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
Backstrom 0:f6e68b4ce169 11 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
Backstrom 0:f6e68b4ce169 12 * PARTICULAR PURPOSE. See the GNU General Public License for more details.
Backstrom 0:f6e68b4ce169 13 *
Backstrom 0:f6e68b4ce169 14 */
Backstrom 0:f6e68b4ce169 15
Backstrom 0:f6e68b4ce169 16 #include "global.h"
Backstrom 0:f6e68b4ce169 17 #include "ds1302.h"
Backstrom 0:f6e68b4ce169 18
Backstrom 0:f6e68b4ce169 19 DS1302::DS1302(PinName sclk, PinName io, PinName rst)
Backstrom 0:f6e68b4ce169 20 : m_sclk(sclk)
Backstrom 0:f6e68b4ce169 21 , m_io(io)
Backstrom 0:f6e68b4ce169 22 , m_rst(rst)
Backstrom 0:f6e68b4ce169 23 {
Backstrom 0:f6e68b4ce169 24 }
Backstrom 0:f6e68b4ce169 25
Backstrom 0:f6e68b4ce169 26 void DS1302::begin()
Backstrom 0:f6e68b4ce169 27 {
Backstrom 0:f6e68b4ce169 28 uint8_t x;
Backstrom 0:f6e68b4ce169 29
Backstrom 0:f6e68b4ce169 30 m_rst = 0;
Backstrom 0:f6e68b4ce169 31 wait_us(2);
Backstrom 0:f6e68b4ce169 32 m_sclk = 0;
Backstrom 0:f6e68b4ce169 33
Backstrom 0:f6e68b4ce169 34 write_byte(0x8e,0);
Backstrom 0:f6e68b4ce169 35 write_byte(0x90,0xa4);
Backstrom 0:f6e68b4ce169 36
Backstrom 0:f6e68b4ce169 37 x=read_byte(0x81);
Backstrom 0:f6e68b4ce169 38
Backstrom 0:f6e68b4ce169 39 if((x & 0x80) != 0) // start oscillator
Backstrom 0:f6e68b4ce169 40 write_byte(0x80,0);
Backstrom 0:f6e68b4ce169 41 }
Backstrom 0:f6e68b4ce169 42
Backstrom 0:f6e68b4ce169 43
Backstrom 0:f6e68b4ce169 44 time_t DS1302::time()
Backstrom 0:f6e68b4ce169 45 {
Backstrom 0:f6e68b4ce169 46 return m_time;
Backstrom 0:f6e68b4ce169 47 }
Backstrom 0:f6e68b4ce169 48
Backstrom 0:f6e68b4ce169 49 struct tm* DS1302::getTime()
Backstrom 0:f6e68b4ce169 50 {
Backstrom 0:f6e68b4ce169 51 m_tm.tm_sec = bcd2dec(read_byte(0x81));
Backstrom 0:f6e68b4ce169 52 m_tm.tm_min = bcd2dec(read_byte(0x83));
Backstrom 0:f6e68b4ce169 53 m_tm.tm_hour = bcd2dec(read_byte(0x84));
Backstrom 0:f6e68b4ce169 54
Backstrom 0:f6e68b4ce169 55 return &m_tm;
Backstrom 0:f6e68b4ce169 56 }
Backstrom 0:f6e68b4ce169 57
Backstrom 0:f6e68b4ce169 58 void DS1302::getTime(uint8_t* hour, uint8_t* min, uint8_t* sec)
Backstrom 0:f6e68b4ce169 59 {
Backstrom 0:f6e68b4ce169 60 if (sec) *sec = bcd2dec(read_byte(0x81));
Backstrom 0:f6e68b4ce169 61 if (min) *min = bcd2dec(read_byte(0x83));
Backstrom 0:f6e68b4ce169 62 if (hour) *hour = bcd2dec(read_byte(0x84));
Backstrom 0:f6e68b4ce169 63 }
Backstrom 0:f6e68b4ce169 64
Backstrom 0:f6e68b4ce169 65 void DS1302::setTime(time_t t)
Backstrom 0:f6e68b4ce169 66 {
Backstrom 0:f6e68b4ce169 67 }
Backstrom 0:f6e68b4ce169 68
Backstrom 0:f6e68b4ce169 69 void DS1302::setTime(uint8_t hour, uint8_t min, uint8_t sec)
Backstrom 0:f6e68b4ce169 70 {
Backstrom 0:f6e68b4ce169 71 write_byte(0x84, dec2bcd(hour));
Backstrom 0:f6e68b4ce169 72 write_byte(0x82, dec2bcd(min));
Backstrom 0:f6e68b4ce169 73 write_byte(0x80, dec2bcd(sec));
Backstrom 0:f6e68b4ce169 74 }
Backstrom 0:f6e68b4ce169 75
Backstrom 0:f6e68b4ce169 76 void DS1302::setTime(struct tm* tm)
Backstrom 0:f6e68b4ce169 77 {
Backstrom 0:f6e68b4ce169 78 /*
Backstrom 0:f6e68b4ce169 79 write_byte(0x86, dec2bcd(day));
Backstrom 0:f6e68b4ce169 80 write_byte(0x88, dec2bcd(month));
Backstrom 0:f6e68b4ce169 81 write_byte(0x8c, dec2bcd(year));
Backstrom 0:f6e68b4ce169 82 write_byte(0x8a, dec2bcd(dayofweek));
Backstrom 0:f6e68b4ce169 83 write_byte(0x84, dec2bcd(hour));
Backstrom 0:f6e68b4ce169 84 write_byte(0x82, dec2bcd(min));
Backstrom 0:f6e68b4ce169 85 write_byte(0x80, dec2bcd(sec));
Backstrom 0:f6e68b4ce169 86
Backstrom 0:f6e68b4ce169 87 void ds1302::set_datetime(BYTE day, BYTE mth, BYTE year, BYTE dow, BYTE hr, BYTE min)
Backstrom 0:f6e68b4ce169 88 {
Backstrom 0:f6e68b4ce169 89 write(0x86,get_bcd(day));
Backstrom 0:f6e68b4ce169 90 write(0x88,get_bcd(mth));
Backstrom 0:f6e68b4ce169 91 write(0x8c,get_bcd(year));
Backstrom 0:f6e68b4ce169 92 write(0x8a,get_bcd(dow));
Backstrom 0:f6e68b4ce169 93 write(0x84,get_bcd(hr));
Backstrom 0:f6e68b4ce169 94 write(0x82,get_bcd(min));
Backstrom 0:f6e68b4ce169 95 write(0x80,get_bcd(0));
Backstrom 0:f6e68b4ce169 96 }
Backstrom 0:f6e68b4ce169 97 */
Backstrom 0:f6e68b4ce169 98 }
Backstrom 0:f6e68b4ce169 99
Backstrom 0:f6e68b4ce169 100 void DS1302::setAlarm(time_t t)
Backstrom 0:f6e68b4ce169 101 {
Backstrom 0:f6e68b4ce169 102 }
Backstrom 0:f6e68b4ce169 103
Backstrom 0:f6e68b4ce169 104 void DS1302::setAlarm(uint8_t hour, uint8_t min, uint8_t sec)
Backstrom 0:f6e68b4ce169 105 {
Backstrom 0:f6e68b4ce169 106 }
Backstrom 0:f6e68b4ce169 107
Backstrom 0:f6e68b4ce169 108 struct tm* DS1302::getAlarm(void)
Backstrom 0:f6e68b4ce169 109 {
Backstrom 0:f6e68b4ce169 110 return 0;
Backstrom 0:f6e68b4ce169 111 }
Backstrom 0:f6e68b4ce169 112
Backstrom 0:f6e68b4ce169 113 void DS1302::getAlarm(uint8_t* hour, uint8_t* min, uint8_t* sec)
Backstrom 0:f6e68b4ce169 114 {
Backstrom 0:f6e68b4ce169 115 }
Backstrom 0:f6e68b4ce169 116
Backstrom 0:f6e68b4ce169 117 bool DS1302::checkAlarm(void)
Backstrom 0:f6e68b4ce169 118 {
Backstrom 0:f6e68b4ce169 119 return false;
Backstrom 0:f6e68b4ce169 120 }
Backstrom 0:f6e68b4ce169 121
Backstrom 0:f6e68b4ce169 122 void DS1302::SQWEnable(bool enable)
Backstrom 0:f6e68b4ce169 123 {
Backstrom 0:f6e68b4ce169 124 }
Backstrom 0:f6e68b4ce169 125
Backstrom 0:f6e68b4ce169 126 void DS1302::SQWSetFreq(enum RTC_SQW_FREQ freq)
Backstrom 0:f6e68b4ce169 127 {
Backstrom 0:f6e68b4ce169 128 }
Backstrom 0:f6e68b4ce169 129
Backstrom 0:f6e68b4ce169 130 uint8_t DS1302::read_byte(uint8_t cmd)
Backstrom 0:f6e68b4ce169 131 {
Backstrom 0:f6e68b4ce169 132 uint8_t data=0;
Backstrom 0:f6e68b4ce169 133
Backstrom 0:f6e68b4ce169 134 m_rst = 1;
Backstrom 0:f6e68b4ce169 135 write_byte(cmd);
Backstrom 0:f6e68b4ce169 136
Backstrom 0:f6e68b4ce169 137 m_io.input();
Backstrom 0:f6e68b4ce169 138 wait_us(1);
Backstrom 0:f6e68b4ce169 139
Backstrom 0:f6e68b4ce169 140 for (uint8_t i = 0; i <= 7; i++)
Backstrom 0:f6e68b4ce169 141 {
Backstrom 0:f6e68b4ce169 142 data += m_io<<i;
Backstrom 0:f6e68b4ce169 143 m_sclk = 1;
Backstrom 0:f6e68b4ce169 144 wait_us(1);
Backstrom 0:f6e68b4ce169 145 m_sclk = 0;
Backstrom 0:f6e68b4ce169 146 wait_us(1);
Backstrom 0:f6e68b4ce169 147 }
Backstrom 0:f6e68b4ce169 148
Backstrom 0:f6e68b4ce169 149 m_rst = 0;
Backstrom 0:f6e68b4ce169 150
Backstrom 0:f6e68b4ce169 151 return data;
Backstrom 0:f6e68b4ce169 152 }
Backstrom 0:f6e68b4ce169 153
Backstrom 0:f6e68b4ce169 154 void DS1302::write_byte(uint8_t cmd, uint8_t data)
Backstrom 0:f6e68b4ce169 155 {
Backstrom 0:f6e68b4ce169 156 m_rst = 1;
Backstrom 0:f6e68b4ce169 157 wait_us(1);
Backstrom 0:f6e68b4ce169 158
Backstrom 0:f6e68b4ce169 159 write_byte(cmd);
Backstrom 0:f6e68b4ce169 160 write_byte(data);
Backstrom 0:f6e68b4ce169 161
Backstrom 0:f6e68b4ce169 162 m_rst = 0;
Backstrom 0:f6e68b4ce169 163 }
Backstrom 0:f6e68b4ce169 164
Backstrom 0:f6e68b4ce169 165 void DS1302::write_byte(uint8_t cmd)
Backstrom 0:f6e68b4ce169 166 {
Backstrom 0:f6e68b4ce169 167 m_io.output();
Backstrom 0:f6e68b4ce169 168
Backstrom 0:f6e68b4ce169 169 for (uint8_t i=0; i<=7; i++)
Backstrom 0:f6e68b4ce169 170 {
Backstrom 0:f6e68b4ce169 171 m_io = (cmd >> i) & 0x01;
Backstrom 0:f6e68b4ce169 172 wait_us(1);
Backstrom 0:f6e68b4ce169 173 m_sclk = 1;
Backstrom 0:f6e68b4ce169 174 wait_us(1);
Backstrom 0:f6e68b4ce169 175 m_sclk = 0;
Backstrom 0:f6e68b4ce169 176 }
Backstrom 0:f6e68b4ce169 177
Backstrom 0:f6e68b4ce169 178 m_io.input();
Backstrom 0:f6e68b4ce169 179 }
Backstrom 0:f6e68b4ce169 180
Backstrom 0:f6e68b4ce169 181 void DS1302::writeRam(uint8_t addr, uint8_t data)
Backstrom 0:f6e68b4ce169 182 {
Backstrom 0:f6e68b4ce169 183 write_byte(addr|0xC0, data);
Backstrom 0:f6e68b4ce169 184 }
Backstrom 0:f6e68b4ce169 185
Backstrom 0:f6e68b4ce169 186 uint8_t DS1302::readRam(uint8_t addr)
Backstrom 0:f6e68b4ce169 187 {
Backstrom 0:f6e68b4ce169 188 return read_byte(addr|0xC1);
Backstrom 0:f6e68b4ce169 189 }