I made a clock in mbed. mbed has RTC built-in. A convenient function is prepared for in the rtc_time function group of mbed.h. Because data are provided at the time when they give unix timestamp and ask it at suitable distance, a format to like it can be set and displays it to LCD. If unix timestamp is provided from web, it becomes more convenient. See: http://blogs.yahoo.co.jp/jf1vrr_station/19803647.html (Japanese)
main.cpp@0:11c4cf24f38b, 2011-04-18 (annotated)
- Committer:
- jf1vrr
- Date:
- Mon Apr 18 05:58:23 2011 +0000
- Revision:
- 0:11c4cf24f38b
Rev. 0.01A 2011/04/18
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jf1vrr | 0:11c4cf24f38b | 1 | /* I made a clock in mbed. mbed has RTC built-in. |
jf1vrr | 0:11c4cf24f38b | 2 | A convenient function is prepared for in the rtc_time |
jf1vrr | 0:11c4cf24f38b | 3 | function group of mbed.h. Because data are provided |
jf1vrr | 0:11c4cf24f38b | 4 | at the time when they give unix timestamp and ask it |
jf1vrr | 0:11c4cf24f38b | 5 | at suitable distance, a format to like it can be set |
jf1vrr | 0:11c4cf24f38b | 6 | and displays it to LCD. If unix timestamp is provided |
jf1vrr | 0:11c4cf24f38b | 7 | from web, it becomes more convenient. |
jf1vrr | 0:11c4cf24f38b | 8 | */ |
jf1vrr | 0:11c4cf24f38b | 9 | #include "mbed.h" |
jf1vrr | 0:11c4cf24f38b | 10 | #include "TextLCD.h" |
jf1vrr | 0:11c4cf24f38b | 11 | |
jf1vrr | 0:11c4cf24f38b | 12 | TextLCD lcd(p24, p26, p27, p28, p29, p30); |
jf1vrr | 0:11c4cf24f38b | 13 | int offset_JAPAN = 32400; |
jf1vrr | 0:11c4cf24f38b | 14 | |
jf1vrr | 0:11c4cf24f38b | 15 | int main() { |
jf1vrr | 0:11c4cf24f38b | 16 | set_time(1303099200+offset_JAPAN); // Set RTC time to Mon, 18 Apr 2011 13:00:00 |
jf1vrr | 0:11c4cf24f38b | 17 | |
jf1vrr | 0:11c4cf24f38b | 18 | lcd.cls(); |
jf1vrr | 0:11c4cf24f38b | 19 | while(1) { |
jf1vrr | 0:11c4cf24f38b | 20 | time_t seconds = time(NULL); |
jf1vrr | 0:11c4cf24f38b | 21 | |
jf1vrr | 0:11c4cf24f38b | 22 | lcd.locate(0,0); |
jf1vrr | 0:11c4cf24f38b | 23 | char day[16]; |
jf1vrr | 0:11c4cf24f38b | 24 | strftime(day, 16, "%Y/%m/%d %a\n", localtime(&seconds)); |
jf1vrr | 0:11c4cf24f38b | 25 | lcd.printf("%s", day); |
jf1vrr | 0:11c4cf24f38b | 26 | |
jf1vrr | 0:11c4cf24f38b | 27 | char time[16]; |
jf1vrr | 0:11c4cf24f38b | 28 | strftime(time, 16, "%H:%M:%S\n", localtime(&seconds)); |
jf1vrr | 0:11c4cf24f38b | 29 | lcd.locate(0,1); |
jf1vrr | 0:11c4cf24f38b | 30 | lcd.printf("%s", time); |
jf1vrr | 0:11c4cf24f38b | 31 | |
jf1vrr | 0:11c4cf24f38b | 32 | wait(1.0); |
jf1vrr | 0:11c4cf24f38b | 33 | } |
jf1vrr | 0:11c4cf24f38b | 34 | } |