Shinichi Fuchita
Simply Clock
Dependencies: EthernetNetIf NTPClient_NetServices TextLCD mbed
Revision 0:7e901efc73e7, committed 2011-03-25
- Comitter:
- soramimi
- Date:
- Fri Mar 25 16:54:13 2011 +0000
- Child:
- 1:7974d199ed39
- Commit message:
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EthernetNetIf.lib Fri Mar 25 16:54:13 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/donatien/code/EthernetNetIf/#bc7df6da7589
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/NTPClient.lib Fri Mar 25 16:54:13 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/donatien/code/NTPClient/#7c3f1199256a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.lib Fri Mar 25 16:54:13 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/TextLCD/#44f34c09bd37
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Mar 25 16:54:13 2011 +0000
@@ -0,0 +1,99 @@
+#include "mbed.h"
+#include "time.h"
+#include "TextLCD.h"
+#include "EthernetNetIf.h"
+#include "NTPClient.h"
+
+#define TIMEZONE (9 * 60 * 60)
+
+TextLCD lcd(p21, p22, p23, p24, p25, p26);
+
+EthernetNetIf eth;
+NTPClient ntp;
+
+unsigned long convert_gregorian_to_julian(int year, int month, int day)
+{
+ if (month < 3) {
+ month += 9;
+ year--;
+ } else {
+ month -= 3;
+ }
+ year += 4800;
+ int c = year / 100;
+ return c * 146097 / 4 + (year - c * 100) * 1461 / 4 + (153 * month + 2) / 5 + day - 32045;
+}
+
+void convert_julian_to_gregorian(unsigned long j, int *year, int *month, int *day)
+{
+ int y, m, d;
+ y = (j * 4 + 128179) / 146097;
+ d = (j * 4 - y * 146097 + 128179) / 4 * 4 + 3;
+ j = d / 1461;
+ d = (d - j * 1461) / 4 * 5 + 2;
+ m = d / 153;
+ d = (d - m * 153) / 5 + 1;
+ y = (y - 48) * 100 + j;
+ if (m < 10) {
+ m += 3;
+ } else {
+ m -= 9;
+ y++;
+ }
+ *year = y;
+ *month = m;
+ *day = d;
+}
+
+void display(int year, int month, int day, int hour, int minute, int second)
+{
+ lcd.cls();
+ lcd.printf("%04u-%02u-%02u\n", year, month, day);
+ lcd.printf("%02u:%02u:%02u\n", hour, minute, second);
+}
+
+int main()
+{
+ eth.setup();
+
+ Host server(IpAddr(), 123, "ntp.jst.mfeed.ad.jp");
+
+ bool adjust = true;
+
+ double last = 0;
+
+ while (1) {
+ if (adjust) {
+ ntp.setTime(server);
+ adjust = false;
+ }
+
+ time_t t = time(0);
+ double s = t + 2440588.0 * 24 * 60 * 60; // chronological julian second
+
+ if (s > last) {
+ last = s;
+
+ s += TIMEZONE;
+
+ unsigned long cjd = (unsigned long)(s / (24 * 60 * 60)); // chronological julian day
+ int year, month, day, hour, minute, second;
+ convert_julian_to_gregorian(cjd, &year, &month, &day);
+ second = (int)fmod(s, 24 * 60 * 60);
+ hour = second / (60 * 60);
+ minute = second / 60 % 60;
+ second %= 60;
+
+ display(year, month, day, hour, minute, second);
+
+ if (hour == 4 && minute == 0 && second == 0) {
+ adjust = true;
+ }
+ }
+
+ wait(0.1);
+ }
+
+ return 0;
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Mar 25 16:54:13 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912