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Implement replay command.

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This commit is contained in:
penturalabs 2014-04-15 11:47:01 +01:00
commit c3963755b7
9 changed files with 210 additions and 168 deletions
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29
common/iso15693tools.c
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@ -12,6 +12,9 @@
#include <stdlib.h>
//#include "iso15693tools.h"
#define POLY 0x8408
// The CRC as described in ISO 15693-Part 3-Annex C
// v buffer with data
// n length
@ -63,5 +66,31 @@ char* Iso15693sprintUID(char *target,uint8_t *uid) {
return target;
}
unsigned short iclass_crc16(char *data_p, unsigned short length)
{
unsigned char i;
unsigned int data;
unsigned int crc = 0xffff;
if (length == 0)
return (~crc);
do
{
for (i=0, data=(unsigned int)0xff & *data_p++;
i < 8;
i++, data >>= 1)
{
if ((crc & 0x0001) ^ (data & 0x0001))
crc = (crc >> 1) ^ POLY;
else crc >>= 1;
}
} while (--length);
crc = ~crc;
data = crc;
crc = (crc << 8) | (data >> 8 & 0xff);
crc = crc ^ 0xBC3;
return (crc);
}