created separate function for hex to char

Dependencies:   SDFileSystem ds3231 eeprom_Nikita mbed testUniGraphic_150217

Fork of SS_SensePOC2P0_11Dec2017_USERPID by rashmi v

Revision:
73:22e4f398a2a6
Parent:
72:1f990fa8c516
Child:
74:9ba8a7101036
--- a/main.cpp	Wed Dec 06 12:47:30 2017 +0000
+++ b/main.cpp	Thu Dec 07 07:30:46 2017 +0000
@@ -160,11 +160,10 @@
                     //gc.printf(" state_display = %d\n", state_display);
                     display(state_display);                                 //display state
                     
-                    // if(state_display == 3)
-                    //{
-                    //   display(15);
-                        //main_state = GET_TOUCH_DISP_STATE;
-                   // }
+                    if(state_display == 15)
+                    {
+                        main_state = GET_TOUCH_DISP_STATE;
+                    }
                     if(state_display == 12)
                     {
                         main_state = BT_TX_STATE;