#line 1 "Src\V2RFEncoding.c" /0
  
#line 1 ".\Task\stdint.h" /0
 
 
 typedef signed long     int32_t;
 typedef unsigned long   uint32_t;
 typedef signed char     int8_t;
 typedef unsigned char   uint8_t;
 typedef signed int      int16_t;
 typedef unsigned int    uint16_t;
 
#line 1 "Src\V2RFEncoding.c" /0
 
  
#line 1 "Src\V2RFEncoding.h" /0
 
 
 
 
  
#line 1 ".\Task\stdint.h" /0
 
#line 2 ".\Task\stdint.h" /1
  
 
 
 
 
 
 
 
#line 5 "Src\V2RFEncoding.h" /0
#line 5 "Src\V2RFEncoding.h" /0
 
  
#line 1 "d:\Keil\C51\Inc\string.h" /0







 
 
 
 
 
 
 
 typedef unsigned int size_t;
 
 
 
 
 
 
 #pragma SAVE
 #pragma REGPARMS
 extern char  *strcat  (char *s1, const char *s2);
 extern char  *strncat (char *s1, const char *s2, size_t n);
 
 extern char   strcmp  (const char *s1, const char *s2);
 extern char   strncmp (const char *s1, const char *s2, size_t n);
 
 extern char  *strcpy  (char *s1, const char *s2);
 extern char  *strncpy (char *s1, const char *s2, size_t n);
 
 extern size_t strlen  (const char *);
 
 extern char  *strchr  (const char *s, char c);
 extern int    strpos  (const char *s, char c);
 extern char  *strrchr (const char *s, char c);
 extern int    strrpos (const char *s, char c);
 
 extern size_t strspn  (const char *s, const char *set);
 extern size_t strcspn (const char *s, const char *set);
 extern char  *strpbrk (const char *s, const char *set);
 extern char  *strrpbrk(const char *s, const char *set);
 extern char  *strstr  (const char *s, const char *sub);
 extern char  *strtok  (char *str, const char *set);
 
 extern char   memcmp  (const void *s1, const void *s2, size_t n);
 extern void  *memcpy  (void *s1, const void *s2, size_t n);
 extern void  *memchr  (const void *s, char val, size_t n);
 extern void  *memccpy (void *s1, const void *s2, char val, size_t n);
 extern void  *memmove (void *s1, const void *s2, size_t n);
 extern void  *memset  (void *s, char val, size_t n);
 #pragma RESTORE
 
 
#line 6 "Src\V2RFEncoding.h" /0
 
 
 
 
 
 
 
 void encodeV2Packet(uint8_t* packet);
 void decodeV2Packet(uint8_t* packet);
 uint8_t xorKey(uint8_t key);
 uint8_t encodeByte(uint8_t byte, uint8_t s1, uint8_t xorKey, uint8_t s2);
 uint8_t decodeByte(uint8_t byte, uint8_t s1, uint8_t xorKey, uint8_t s2); 
 
 void TestDecode(void);
 
#line 2 "Src\V2RFEncoding.c" /0
 
 
 
 
 
 
 




 
 uint8_t code V2_OFFSETS[][4] = {
 { 0x45, 0x1F, 0x14, 0x5C },  
 { 0x2B, 0xC9, 0xE3, 0x11 },  
 { 0x6D, 0x5F, 0x8A, 0x2B },  
 { 0xAF, 0x03, 0x1D, 0xF3 },  
 { 0x1A, 0xE2, 0xF0, 0xD1 },  
 { 0x04, 0xD8, 0x71, 0x42 },  
 { 0xAF, 0x04, 0xDD, 0x07 },  
 { 0x61, 0x13, 0x38, 0x64 }   
 };
 
 uint8_t xorKey(uint8_t key) {
 
 const uint8_t shift = (key & 0x0F) < 0x04 ? 0 : 1;
 const uint8_t x = (((key & 0xF0) >> 4) + shift + 6) % 8;
 const uint8_t msn = (((4 + x) ^ 1) & 0x0F) << 4;
 
 
 const uint8_t lsn = ((((key & 0xF) + 4)^2) & 0x0F);
 
 return ( msn | lsn );
 }
 
 uint8_t decodeByte(uint8_t byte, uint8_t s1, uint8_t xorKey, uint8_t s2) {
 uint8_t value = byte - s2;
 value = value ^ xorKey;
 value = value - s1;
 
 return value;
 }
 
 uint8_t encodeByte(uint8_t byte, uint8_t s1, uint8_t xorKey, uint8_t s2) {
 uint8_t value = byte + s1;
 value = value ^ xorKey;
 value = value + s2;
 
 return value;
 }
 
 void decodeV2Packet(uint8_t *packet) {
 uint8_t i = 0;
 uint8_t key = xorKey(packet[0]);
 
 for (i = 1; i <= 8; i++)
 {
 packet[i] = decodeByte(packet[i], 0, key, ( V2_OFFSETS[i-1][packet[0]%4] + ((0x54 > 0 && packet[0] >= 0x54 && packet[0] < 0x54+0x80) ? 0x80 : 0) ));
 }
 }
 
 void encodeV2Packet(uint8_t *packet) {
 uint8_t i = 0;
 uint8_t key = xorKey(packet[0]);
 uint8_t sum = key;
 
 for (i = 1; i <= 7; i++) {
 sum += packet[i];
 packet[i] = encodeByte(packet[i], 0, key, ( V2_OFFSETS[i-1][packet[0]%4] + ((0x54 > 0 && packet[0] >= 0x54 && packet[0] < 0x54+0x80) ? 0x80 : 0) ));
 }
 
 packet[8] = encodeByte(sum, 2, key, ( V2_OFFSETS[8-1][packet[0]%4] + ((0 > 0 && packet[0] >= 0 && packet[0] < 0+0x80) ? 0x80 : 0) ));
 }
 
 
 
#line 78 "Src\V2RFEncoding.c" /1
 
 
#line 80 "Src\V2RFEncoding.c" /0
 
 
 
 void TestDecode(void)
 {
 
#line 86 "Src\V2RFEncoding.c" /1
 
 
 
 
 
 
 
 
 
#line 95 "Src\V2RFEncoding.c" /0
 }