Skip to content

Commit b29fed8

Browse files
stevstrongstevstrong
committed
reworked RTC - no need for extra time library
http://www.stm32duino.com/viewtopic.php?f=39&t=775&p=31218#p31218
1 parent 8b4af36 commit b29fed8

4 files changed

Lines changed: 485 additions & 154 deletions

File tree

‎STM32F4/libraries/RTClock/examples/Test_RTClock/Test_RTClock.ino‎

Lines changed: 209 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,209 @@
1+
/*
2+
This is an example of how to use the RTclock of STM32F4 device
3+
4+
This example can also be used to set the RTC to the current epoch time:
5+
- goto: http://www.unixtimestamp.com/
6+
- enter the current date and time to the right field "Timestamp converter"
7+
- press the "Convert" button
8+
-
9+
*/
10+
11+
#include <RTClock.h>
12+
13+
#include <Streaming.h>
14+
15+
16+
//RTClock rt(RTCSEL_LSE); // initialise
17+
RTClock rtc;
18+
19+
time_t tt;
20+
tm_t tm;
21+
22+
const uint32_t DEFAULT_TIME = 1498944019; // 2017.07.01, 21:20:19 used as reference epoch time
23+
24+
#define TIME_HEADER 'T' // Header tag for serial time sync message
25+
#define TIME_REQUEST 7 // ASCII bell character requests a time sync message
26+
27+
#define LED_PIN BOARD_LED_PIN
28+
29+
//-----------------------------------------------------------------------------
30+
void blink ()
31+
{
32+
digitalWrite(LED_PIN, digitalRead(LED_PIN)?LOW:HIGH);
33+
}
34+
35+
uint8_t s[20]; // for serial parsing
36+
37+
//-----------------------------------------------------------------------------
38+
char * read_line()
39+
{
40+
while ( Serial.available() ) Serial.read(); // empty Rx buffer
41+
while ( Serial.available()<=0 ) ; // wait for new characters
42+
uint8_t c, i = 0;
43+
s[0] = 0;
44+
while ( Serial.available() && (i<20) ) {
45+
c = Serial.read();
46+
if ( c=='\n' || c== '\r') {
47+
s[i] = 0;
48+
break;
49+
}
50+
s[i++] = c;
51+
}
52+
while ( Serial.available() ) Serial.read(); // flush Rx
53+
return (char*)&s[0];
54+
}
55+
56+
//-----------------------------------------------------------------------------
57+
void processSyncMessage(void)
58+
{
59+
if ( Serial.available() ) {
60+
if( *read_line()==(TIME_HEADER) ) {
61+
uint32_t pctime = atoi((const char*)&s[1]);
62+
Serial << ("Epoch time received: ") << pctime << endl;
63+
if ( pctime >= DEFAULT_TIME) { // check the integer is a valid epoch time
64+
rtc.setTime(pctime); // Set RTC to the time received via the serial port
65+
}
66+
}
67+
Serial << endl;
68+
}
69+
}
70+
71+
//-----------------------------------------------------------------------------
72+
void Change_DateTime(void)
73+
{
74+
// check and correct the weekday if necessary
75+
rtc.getTime(tm);
76+
Serial << "Current weekday is " << (tm.weekday);
77+
// get time elements
78+
tt = rtc.makeTime(tm);
79+
uint16_t tmp = rtc.weekday(tt);
80+
if ( tmp!=tm.weekday ) {// correct weekday
81+
rtc.setTime(tt);
82+
Serial << " instead of " << tmp << ". Now is corrected.\n";
83+
} else {
84+
Serial << " - seems to be fine, no need to change it.\n";
85+
}
86+
87+
uint8_t chg = 0;
88+
// get time elements
89+
rtc.getTime(tm);
90+
Serial << "\nCurrent RTC date: " << (1970+tm.year) << "." << (tm.month) << (".") << (tm.day) << (", weekday: ") << (tm.weekday) << endl;
91+
Serial << "Do you want to change it? (y/n)\n";
92+
if ( *read_line()=='y' ) {
93+
// change here the date
94+
change_year:
95+
Serial << "Current year: " << (1970+tm.year) << ". Enter new year in \"YYYY\" format (numbers only) or press enter to skip.\n";
96+
if (*read_line()==0) goto change_month;
97+
tmp = atoi((const char*)s);
98+
if ( tmp<1970 ) { Serial << "Please enter a valid number greater than 1970\n"; goto change_year; }
99+
Serial << "You entered: " << tmp << ". Accept value? (y/n)\n";
100+
if ( *read_line()=='n' ) goto change_year;
101+
tm.year = tmp-1970;
102+
chg = 1;
103+
change_month:
104+
Serial << "Current month: " << tm.month << ". Enter new month in \"MM\" format [1..12] or press enter to skip.\n";
105+
if (*read_line()==0) goto change_day;
106+
tmp = atoi((const char*)s);
107+
if ( tmp<1 || tmp>12 ) { Serial << "Please enter a valid number [1..12]\n"; goto change_month; }
108+
Serial << "You entered: " << tmp << ". Accept value? (y/n)\n";
109+
if ( *read_line()=='n' ) goto change_month;
110+
tm.month = tmp;
111+
chg = 1;
112+
change_day:
113+
Serial << "Current day: " << tm.day << ". Enter new day in \"DD\" format [1..31] or press enter to skip.\n";
114+
if (*read_line()==0) goto change_weekday;
115+
tmp = atoi((const char*)s);
116+
if ( tmp<1 || tmp>31 ) { Serial << "Please enter a valid number [1..31]\n"; goto change_day; }
117+
Serial << "You entered: " << tmp << ". Accept value? (y/n)\n";
118+
if ( *read_line()=='n' ) goto change_day;
119+
tm.day = tmp;
120+
chg = 1;
121+
change_weekday:
122+
Serial << "Current weekday: " << tm.weekday << ". Enter new weekday [1(=Monday)..7(=Sunday)] or press enter to skip.\n";
123+
if (*read_line()==0) goto change_time;
124+
tmp = atoi((const char*)s);
125+
if ( tmp<1 || tmp>7 ) { Serial << "Please enter a valid number [1..7]\n"; goto change_weekday; }
126+
Serial << "You entered: " << tmp << ". Accept value? (y/n)\n";
127+
if ( *read_line()=='n' ) goto change_weekday;
128+
tm.weekday = tmp;
129+
chg = 1;
130+
change_time:
131+
Serial << "Current RTC time: " << _TIME(tm.hour, tm.minute, tm.second) << endl;
132+
Serial << "Do you want to change it? (y/n)\n";
133+
if ( *read_line()=='n' ) goto change_end;
134+
change_hour:
135+
Serial << "Current hour: " << tm.hour << ". Enter new hour [0..23] or press enter to skip.\n";
136+
if (*read_line()==0) goto change_minute;
137+
tmp = atoi((const char*)s);
138+
if ( tmp>23 ) { Serial << "Please enter a valid number [0..23]\n"; goto change_hour; }
139+
Serial << "You entered: " << tmp << ". Accept value? (y/n)\n";
140+
if ( *read_line()=='n' ) goto change_hour;
141+
tm.hour = tmp;
142+
chg = 1;
143+
change_minute:
144+
Serial << "Current minute: " << tm.minute << ". Enter new minute [0..59] or press enter to skip.\n";
145+
if (*read_line()==0) goto change_second;
146+
tmp = atoi((const char*)s);
147+
if ( tmp>59 ) { Serial << "Please enter a valid number [0..59]\n"; goto change_minute; }
148+
Serial << "You entered: " << tmp << ". Accept value? (y/n)\n";
149+
if ( *read_line()=='n' ) goto change_minute;
150+
tm.minute = tmp;
151+
chg = 1;
152+
change_second:
153+
Serial << "Current second: " << tm.second << ". Enter new second [0..59] or press enter to skip.\n";
154+
if (*read_line()==0) goto change_end;
155+
tmp = atoi((const char*)s);
156+
if ( tmp>59 ) { Serial << "Please enter a valid number [0..59]\n"; goto change_second; }
157+
Serial << "You entered: " << tmp << ". Accept value? (y/n)\n";
158+
if ( *read_line()=='n' ) goto change_second;
159+
tm.second = tmp;
160+
chg = 1;
161+
} else {
162+
goto change_time;
163+
}
164+
165+
change_end:
166+
if ( chg ) {
167+
// set here the RTC time.
168+
Serial << "Changed date & time: " << (1970+tm.year) << "." << (tm.month) << (".") << (tm.day) << (", weekday: ") << (tm.weekday) << ", " << _TIME(tm.hour, tm.minute, tm.second) << endl;
169+
Serial << "Write now to RTC? (y/n)\n";
170+
read_line();
171+
if ( s[0]=='y' ) {
172+
rtc.setTime(tm);
173+
Serial << "Data written to RTC.\n\n";
174+
}
175+
} else
176+
Serial << "RTC was not changed.\n\n";
177+
}
178+
//-----------------------------------------------------------------------------
179+
void setup()
180+
{
181+
Serial.begin();
182+
delay(3000);
183+
184+
pinMode(LED_PIN, OUTPUT);
185+
186+
Serial << "This is an example of how to use the STM32F4 RTC library.\n\n";
187+
188+
Change_DateTime();
189+
}
190+
191+
//-----------------------------------------------------------------------------
192+
void loop()
193+
{
194+
if ( Serial.available() ) {
195+
// adjust time according to received epoch time from PC
196+
processSyncMessage();
197+
}
198+
199+
if (tt!=rtc.now()) {
200+
// get epoch time
201+
tt = rtc.now();
202+
Serial << ("- RTC epoch timestamp = ") << (tt);
203+
// get time elements
204+
rtc.getTime(tm);
205+
//rtc.breakTime(tt, tm);
206+
Serial << (" == ") << (1970+tm.year) << "." << (tm.month) << (".") << (tm.day) << (", weekday ") << (tm.weekday) << (", ");
207+
Serial << _TIME(tm.hour, tm.minute, tm.second) << endl;
208+
}
209+
}

‎STM32F4/libraries/RTClock/library.properties‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -7,3 +7,4 @@ paragraph=Real Time Clock for STM32F4
77
category=Other
88
url=
99
architectures=STM32F4
10+
maintainer=www.stm32duino.com

0 commit comments

Comments
 (0)