David Smart / TimeInterface

A time interface class. This class replicates the normal time functions, but goes a couple of steps further. mbed library 82 and prior has a defective gmtime function. Also, this class enables access to setting the time, and adjusting the accuracy of the RTC.

Dependencies:   CalendarPage

Dependents:   CI-data-logger-server WattEye X10Svr SSDP_Server

Diff: TimeInterface.cpp

Revision:
2:65e0a25c7551
Parent:
1:2ee90f546f54
Child:
3:49f36b489b64
--- a/TimeInterface.cpp	Sat Jun 14 12:34:53 2014 +0000
+++ b/TimeInterface.cpp	Sun Jun 22 21:00:01 2014 +0000
@@ -3,6 +3,20 @@
 
 #include "rtc_api.h"
 
+#define DEBUG "Time"
+#include <cstdio>
+#if (defined(DEBUG) && !defined(TARGET_LPC11U24))
+#define DBG(x, ...)  std::printf("[DBG %s %3d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+#define WARN(x, ...) std::printf("[WRN %s %3d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+#define ERR(x, ...)  std::printf("[ERR %s %3d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+#define INFO(x, ...) std::printf("[INF %s %3d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+#else
+#define DBG(x, ...)
+#define WARN(x, ...)
+#define ERR(x, ...)
+#define INFO(x, ...)
+#endif
+
 #ifdef WIN32
 // Fake it out for Win32 development and testing
 struct LPC {
@@ -25,6 +39,24 @@
 {
 }
 
+NTPResult TimeInterface::setTime(const char* host, uint16_t port, uint32_t timeout)
+{
+    NTPClient ntp;
+    NTPResult res;
+    int16_t tzomin = get_tzo_min();
+    INFO("setTime(%s, %d, %d) %d\r\n", host, port, timeout, tzomin);
+    res = ntp.setTime(host, port, timeout);
+    INFO("  ret: %d\r\n", res);
+    if (res == NTP_OK) {
+        // if the time was fetched successfully, then 
+        // let's save the time last set with the local tzo applied
+        // and this saves the last time set for later precision
+        // tuning.
+        set_time(std::time(NULL));
+    }
+    return res;
+}
+
 clock_t TimeInterface::clock(void)
 {
     return std::clock();
@@ -55,7 +87,7 @@
     return result;
 }
 
-char * TimeInterface::asctime(const struct tm_ex *timeptr)
+char * TimeInterface::asctime(const struct tm_ex * timeptr)
 {
     static const char wday_name[][4] = {
         "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
@@ -130,10 +162,11 @@
 
 void TimeInterface::set_time(time_t t, int16_t tzo_min)
 {
-    time_t tval = t - tzo_min;
+    time_t tval = t - (tzo_min * 60);
     rtc_init();
     rtc_write(tval);
     LPC_RTC->GPREG1 = tval;
+    INFO("set_time(%s)", ctime(&tval));
 }
 
 void TimeInterface::set_tzo_min(int16_t tzo_min)