fix: full refresh. (#5)

src/app/epd_2in9.c

@@ -405,7 +405,7 @@ void EPD_2IN9_Update_Clock(void)
     }
  
     // full update on first start
-    bool full_upd = (clock_last == 0 || l->tm_min == 0) ? true : false;
+    bool full_upd = (clock_last > 60 || l->tm_min == 0) ? true : false;
 
     // clock started.
     clock_last = l->tm_min;

src/app/epd_driver.c

@@ -53,7 +53,7 @@ uint8_t epd_step = EPD_CMD_NC;
 uint8_t epd_step_data[EPD_STEP_DATA_LEN];   // store parameters 
 
 // the clock refesh on change
-uint8_t clock_last = -1;
+uint8_t clock_last = 0xff;
 
 // BLE data buffer
 uint8_t ble_data[BLE_DATA_MAX];
@@ -312,7 +312,7 @@ void EPD_Command(const uint8_t *cmd, int cmd_len)
         // display mode change
         case EPD_CMD_MODE:
             if (epd_mode != cmd[1]) {
-                clock_last = -1;
+                clock_last = 0xff;
                 epd_mode = cmd[1];
                 need_update = 1;
             }

src/app/epd_service.c

@@ -380,7 +380,7 @@ static bStatus_t EPDService_WriteAttrCB(uint16_t connHandle,
                 EpochLastVal = t;
 
                 // notify EPD to refresh
-                clock_last = -1;
+                clock_last = 0xff;
                 EPDTask_Update();
             }
             break;