3 files changed, 44 insertions, 2 deletions
diff --git a/watch-library/shared/watch/watch_private_display.c b/watch-library/shared/watch/watch_private_display.c
index 474e5ffd..245b20ed 100644
--- a/watch-library/shared/watch/watch_private_display.c
+++ b/watch-library/shared/watch/watch_private_display.c
@@ -82,8 +82,12 @@ void watch_display_character(uint8_t character, uint8_t position) {
             continue;
         }
         uint8_t seg = segmap & 0x3F;
-        watch_clear_pixel(com, seg);
-        if (segdata & 1) watch_set_pixel(com, seg);
+
+        if (segdata & 1)
+          watch_set_pixel(com, seg);
+        else
+          watch_clear_pixel(com, seg);
+
         segmap = segmap >> 8;
         segdata = segdata >> 1;
     }
@@ -93,6 +97,32 @@ void watch_display_character(uint8_t character, uint8_t position) {
     else if (position == 1 && (character == 'B' || character == 'D' || character == '@')) watch_set_pixel(0, 12); // add funky ninth segment
 }
 
+void watch_display_character_lp_seconds(uint8_t character, uint8_t position) {
+    // Will only work for digits and for positions  8 and 9 - but less code & checks to reduce power consumption
+
+    uint64_t segmap = Segment_Map[position];
+    uint64_t segdata = Character_Set[character - 0x20];
+
+    for (int i = 0; i < 8; i++) {
+        uint8_t com = (segmap & 0xFF) >> 6;
+        if (com > 2) {
+            // COM3 means no segment exists; skip it.
+            segmap = segmap >> 8;
+            segdata = segdata >> 1;
+            continue;
+        }
+        uint8_t seg = segmap & 0x3F;
+
+        if (segdata & 1)
+          watch_set_pixel(com, seg);
+        else
+          watch_clear_pixel(com, seg);
+
+        segmap = segmap >> 8;
+        segdata = segdata >> 1;
+    }
+}
+
 void watch_display_string(char *string, uint8_t position) {
     size_t i = 0;
     while(string[i] != 0) {
diff --git a/watch-library/shared/watch/watch_private_display.h b/watch-library/shared/watch/watch_private_display.h
index 11219cf1..606b8dc3 100644
--- a/watch-library/shared/watch/watch_private_display.h
+++ b/watch-library/shared/watch/watch_private_display.h
@@ -142,5 +142,7 @@ static const uint64_t Segment_Map[] = {
 static const uint8_t Num_Chars = 10;
 
 void watch_display_character(uint8_t character, uint8_t position);
+void watch_display_character_lp_seconds(uint8_t character, uint8_t position);
+
 
 #endif
diff --git a/watch-library/shared/watch/watch_rtc.h b/watch-library/shared/watch/watch_rtc.h
index 6609e6b6..3e63bb55 100644
--- a/watch-library/shared/watch/watch_rtc.h
+++ b/watch-library/shared/watch/watch_rtc.h
@@ -147,5 +147,15 @@ void watch_rtc_disable_matching_periodic_callbacks(uint8_t mask);
   */
 void watch_rtc_disable_all_periodic_callbacks(void);
 
+/** @brief Enable/disable RTC while in-flight. This is quite dangerous operation, so we repeat writing register twice.
+ * Used when temporarily pausing RTC when adjusting subsecond, which are not accessible otherwise.
+  */
+void watch_rtc_enable(bool en);
+
+/** @brief Adjusts frequency correction in single register write. Not waiting for syncronisation to save power - if you won't write new
+ * correction value in the same ~millisecond - will not cause issue.
+  */
+void watch_rtc_freqcorr_write(int16_t value, int16_t sign);
+
 /// @}
 #endif