int VikingDemod_AM(uint8_t *dest, size_t *size) {
//make sure buffer has data
if (*size < 64*2) return -2;
-
size_t startIdx = 0;
uint8_t preamble[] = {1,1,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
if ( checkCalc != 0xA8 ) return -5;
if (*size != 64) return -6;
//return start position
- return (int) startIdx;
+ return (int)startIdx;
}
// by iceman
if (errChk == 0) return -2; //preamble not found
if (*size != 96) return -3; //wrong demoded size
//return start position
- return (int) startIdx;
+ return (int)startIdx;
}
// by iceman
// find Noralsy preamble in already demoded data
if (errChk == 0) return -2; //preamble not found
if (*size != 96) return -3; //wrong demoded size
//return start position
- return (int) startIdx;
+ return (int)startIdx;
}
// find presco preamble 0x10D in already demoded data
int PrescoDemod(uint8_t *dest, size_t *size) {
if (errChk == 0) return -2; //preamble not found
if (*size != 128) return -3; //wrong demoded size
//return start position
- return (int) startIdx;
+ return (int)startIdx;
}
// Ask/Biphase Demod then try to locate an ISO 11784/85 ID
// BitStream must contain previously askrawdemod and biphasedemoded data
-int FDXBdemodBI(uint8_t *dest, size_t *size)
-{
- //make sure buffer has enough data
- if (*size < 128) return -1;
-
+int FDXBdemodBI(uint8_t *dest, size_t *size) {
+ if (*size < 128*2) return -1; //make sure buffer has enough data
size_t startIdx = 0;
uint8_t preamble[] = {0,0,0,0,0,0,0,0,0,0,1};
-
uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
if (errChk == 0) return -2; //preamble not found
+ if (*size != 128) return -3; //wrong demoded size
+ //return start position
return (int)startIdx;
}
// ASK/Diphase fc/64 (inverted Biphase)
// Note: this i s not a demod, this is only a detection
// the parameter *dest needs to be demoded before call
+// 0xFFFF preamble, 64bits
int JablotronDemod(uint8_t *dest, size_t *size){
- //make sure buffer has enough data
- if (*size < 64) return -1;
-
+ if (*size < 64*2) return -1; //make sure buffer has enough data
size_t startIdx = 0;
- // 0xFFFF preamble, 64bits
- uint8_t preamble[] = {
- 1,1,1,1,
- 1,1,1,1,
- 1,1,1,1,
- 1,1,1,1,
- 0
- };
-
+ uint8_t preamble[] = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0};
uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
- if (errChk == 0) return -4; //preamble not found
- if (*size != 64) return -3;
+ if (errChk == 0) return -2; //preamble not found
+ if (*size != 64) return -3; // wrong demoded size
uint8_t checkchksum = 0;
for (int i=16; i < 56; i += 8) {
checkchksum += bytebits_to_byte(dest+startIdx+i,8);
}
checkchksum ^= 0x3A;
-
uint8_t crc = bytebits_to_byte(dest+startIdx+56, 8);
-
- if ( checkchksum != crc ) return -5;
+ if ( checkchksum != crc ) return -5;
return (int)startIdx;
}