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:
43:85a7f399cb9d
Parent:
22:ffa88619551d
Child:
61:ce5ad0838227
--- a/ecg_dec.h	Mon Sep 11 10:02:46 2017 +0000
+++ b/ecg_dec.h	Mon Sep 11 13:09:29 2017 +0000
@@ -3,5 +3,5 @@
 #ifndef ECG_DEC_H_
 #define ECG_DEC_H_
 
-uint16_t ecg(int32_t pid);
+uint16_t ecg(uint32_t pid);
 #endif
\ No newline at end of file