Rasteroids/RTC.cpp at main · funnypolynomial/Rasteroids · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
#include <Arduino.h>
#include <SoftwareI2C.h>
#include "Pins.h"
#include "RTC.h"

// real time clock
RTC rtc;

#ifdef RTC_I2C_ADDRESS
SoftwareI2C softWire;
#endif

RTC::RTC():
  m_Hour24(12),
  m_Minute(0),
  m_Second(0),
  m_DayOfWeek(1),
  m_DayOfMonth(1),
  m_Month(1),
  m_Year(12)
{
}

#ifdef RTC_I2C_ADDRESS
void RTC::Setup()
{
  softWire.begin(PIN_RTC_SDA, PIN_RTC_SCL);
  ReadTime(true);
}

void RTC::ReadTime(bool Full)
{
  if (Full)
  {
    // from register 0
    softWire.beginTransmission(RTC_I2C_ADDRESS);
    softWire.write((byte)0x00);
    softWire.endTransmission();

    softWire.requestFrom(RTC_I2C_ADDRESS, 7);

    m_Second = BCD2Dec(softWire.read());
  }
  else
  {
    // just the minutes and hours
    // from register 1
    softWire.beginTransmission(RTC_I2C_ADDRESS);
    softWire.write((byte)0x01);
    softWire.endTransmission();

    softWire.requestFrom(RTC_I2C_ADDRESS, 2);
  }
  m_Minute = BCD2Dec(softWire.read());
  byte Register2 = softWire.read();
  if (Register2 & 0x40)  // 12/24 hr
  {
    // 12 hr mode, bit 6=PM
    m_Hour24 = BCD2Dec(Register2 & 0x3F);
    if (Register2 & 0x20)
    {
      m_Hour24 += 12;
      if (m_Hour24 > 23) m_Hour24 = 0;
    }
  }
  else
  {
    // 24 hour mode
    m_Hour24 = BCD2Dec(Register2 & 0x3F);
  }

  if (Full)
  {
    m_DayOfWeek  = BCD2Dec(softWire.read());
    m_DayOfMonth = BCD2Dec(softWire.read());
    m_Month      = BCD2Dec(softWire.read());
    m_Year       = BCD2Dec(softWire.read());
  }
  if (m_Minute >= 60)
  {
     m_Hour24 = 12;
     m_Minute = m_Second = 0;
     m_DayOfWeek = m_DayOfMonth = m_Month = m_Year = 1;
  }
}

byte RTC::ReadSecond()
{
  // from register 01
  softWire.beginTransmission(RTC_I2C_ADDRESS);
  softWire.write(0x00);
  softWire.endTransmission();

  softWire.requestFrom(RTC_I2C_ADDRESS, 1);

  m_Second = BCD2Dec(softWire.read());
  return m_Second;
}

byte RTC::ReadMinute()
{
  // from register 01
  softWire.beginTransmission(RTC_I2C_ADDRESS);
  softWire.write(0x01);
  softWire.endTransmission();

  softWire.requestFrom(RTC_I2C_ADDRESS, 1);

  return BCD2Dec(softWire.read());
}

void RTC::WriteTime()
{
  softWire.beginTransmission(RTC_I2C_ADDRESS);
  softWire.write((byte)0x00);
  softWire.write(Dec2BCD(m_Second));
  softWire.write(Dec2BCD(m_Minute));
  softWire.write(Dec2BCD(m_Hour24));  // 24 hr mode
  softWire.write(Dec2BCD(m_DayOfWeek));
  softWire.write(Dec2BCD(m_DayOfMonth));
  softWire.write(Dec2BCD(m_Month));
  softWire.write(Dec2BCD(m_Year));
  softWire.endTransmission();
}
#else
void RTC::Setup()
{
}

void RTC::ReadTime(bool )
{
}

byte RTC::ReadSecond()
{
  return m_Second;
}

byte RTC::ReadMinute()
{
  return m_Minute;
}

void RTC::WriteTime()
{
}
#endif

bool RTC::CheckPeriod(unsigned long& Timer, unsigned long PeriodMS)
{
  // has the timer interval gone off?
  unsigned long Now = millis();
  if (Now - Timer > PeriodMS)
  {
    Timer = Now;
    return true;
  }
  return false;
}

byte RTC::BCD2Dec(byte BCD)
{
  return (BCD / 16 * 10) + (BCD & 0x0F);
}

byte RTC::Dec2BCD(byte Dec)
{
  return (Dec / 10 * 16) + (Dec % 10);
}