Diff: SPS/SPS.h

Revision:

4:c70ef089a3fd

Parent:

2:39c4a85dc2a4

Child:

5:11782a2008c2

--- a/SPS/SPS.h	Thu Feb 23 14:54:35 2017 +0000
+++ b/SPS/SPS.h	Thu Mar 02 14:04:56 2017 +0000
@@ -5,19 +5,32 @@
 #define HEADEREND '|'
 #define SPACE ' '
 
+#define P_16 0xA001 
+
 using std::string;
 
 class SPS{
 public:
     //default constructor
     SPS();    
-         
+    
+    
+    //Updates current string     
     void UpdateCurrentString(string tag, string identifier_id, string group_id, string date, string time, string ZZZ,string s1, string source_id, string interpreter_id, string data_line_version, string encoding, string source_firmware_version, string interpreter_firmware_version, string latitude, string longitude, char gpsFixFlag, string mag_time, string mag_nt, string mag_sq);
     
-    string checkSumCalc(void);    
+    //Fills the array for calculation of the CRC-16 with values
+    void init_crc16_tab();
     
+    //  The function update_crc_16 calculates a new CRC-16 value based on the 
+    //  previous value of the CRC and the next byte of the data to be checked.
+    unsigned short update_crc_16(unsigned short crc, char c)    
+    
+    
+private:    
     string currentString;
     string currentErrString;
-    string headerString;    
+    string headerString;
+    int crc_tab16_init;              
+    unsigned short crc_tab16[256];  
                      
 };