Optimization: removed usage of gettime() where possible

radio/src/gui/view_main.cpp

@@ -316,9 +316,7 @@ void displayTopBar()
     LCD_ICON(BAR_VOLUME_X, BAR_Y, ICON_SPEAKER3);
 
   /* RTC time */
-  struct gtm t;
-  gettime(&t);
-  putsTime(BAR_TIME_X, BAR_Y+1, t, LEFT|TIMEBLINK);
+  putsRtcTime(BAR_TIME_X, BAR_Y+1, LEFT|TIMEBLINK);
 
   /* The background */
   lcd_filled_rect(BAR_X, BAR_Y, BAR_W, BAR_H, SOLID, FILL_WHITE|GREY(12)|ROUND);

radio/src/lcd.h

@@ -215,7 +215,7 @@ void putsTelemetryChannel(xcoord_t x, uint8_t y, uint8_t channel, lcdint_t val,
   #define putstime_t int16_t
 #endif
 
-void putsTime(xcoord_t x, uint8_t y, struct gtm t, LcdFlags att);
+void putsRtcTime(xcoord_t x, uint8_t y, LcdFlags att);
 void putsTimer(xcoord_t x, uint8_t y, putstime_t tme, LcdFlags att, LcdFlags att2);
 
 #define SOLID  0xff

radio/src/lcd_common.cpp

@@ -602,9 +602,9 @@ void lcdDrawTelemetryTopBar()
 #endif
 
 #if defined(CPUARM) && defined(RTCLOCK)
-void putsTime(xcoord_t x, uint8_t y, struct gtm t, LcdFlags att)
+void putsRtcTime(xcoord_t x, uint8_t y, LcdFlags att)
 {
-  putsTimer(x, y, t.tm_hour*60+t.tm_min, att, att);
+  putsTimer(x, y, getValue(MIXSRC_FIRST_TELEM-1+TELEM_TX_TIME), att, att);
 }
 #endif
 
@@ -928,10 +928,7 @@ void putsTelemetryChannel(xcoord_t x, uint8_t y, uint8_t channel, lcdint_t val,
 #if defined(CPUARM) && defined(RTCLOCK)
     case TELEM_TX_TIME-1:
     {
-      gtm t;
-      t.tm_hour = val / 60;
-      t.tm_min = val % 60;
-      putsTime(x, y, t, att);
+      putsRtcTime(x, y, att);
       break;
     }
 #endif

radio/src/mixer.cpp

@@ -326,11 +326,7 @@ getvalue_t getValue(uint8_t i)
 
   else if (i==MIXSRC_FIRST_TELEM-1+TELEM_TX_VOLTAGE) return g_vbat100mV;
 #if defined(CPUARM) && defined(RTCLOCK)
-  else if (i==MIXSRC_FIRST_TELEM-1+TELEM_TX_TIME) {
-    struct gtm t;
-    gettime(&t);
-    return t.tm_hour*60 + t.tm_min;
-  }
+  else if (i==MIXSRC_FIRST_TELEM-1+TELEM_TX_TIME) return (g_rtcTime % SECS_PER_DAY) / 60; // number of minutes from midnight
 #endif
   else if (i<=MIXSRC_FIRST_TELEM-1+TELEM_TIMER2) return timersStates[i-MIXSRC_FIRST_TELEM+1-TELEM_TIMER1].val;
 #if defined(FRSKY)

radio/src/rtc.cpp

@@ -107,9 +107,6 @@ verify (twos_complement_arithmetic, TYPE_TWOS_COMPLEMENT (int));
 #define TM_YEAR_BASE 1900
 verify (base_year_is_a_multiple_of_100, TM_YEAR_BASE % 100 == 0);
 
-#define SECS_PER_HOUR   3600ul
-#define SECS_PER_DAY    86400ul
-
 /* Return 1 if YEAR + TM_YEAR_BASE is a leap year.  */
 static inline int
 leapyear (long int year)

radio/src/rtc.h

@@ -39,6 +39,9 @@
 
 #include <inttypes.h>
 
+#define SECS_PER_HOUR   3600ul
+#define SECS_PER_DAY    86400ul
+
 typedef long int gtime_t;
 
 struct gtm