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:
70:f2e544a5645b
Parent:
69:128e3b467820
Child:
72:1f990fa8c516
--- a/main.h	Thu Nov 23 12:11:46 2017 +0000
+++ b/main.h	Thu Nov 30 10:25:19 2017 +0000
@@ -34,6 +34,7 @@
 #define BG_TEST_SUCCSS_RES                  0x2Au
 #define BG_REPLACE_TEST_STRIP_RES           0x2Eu
 #define BG_RESULT_IMPROPER_RES              0x2Fu
+#define BG_TIMEOUT_RES                      0X25u
 
 #define ECG_TEST_IN_PROGRESS_RES            0x36u
 #define ECG_TEST_SUCCSS_RES                 0x3Au