CR14_10 STMICROELECTRONICS [STMicroelectronics], CR14_10 Datasheet - Page 44

• Manufacturer Part Number: CR14_10
• Description: ISO14443 type-B contactless coupler chip with anti-collision and CRC management
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ISO14443 type B CRC calculation
Appendix A
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define BYTEunsigned char
#define USHORTunsigned short
unsigned short UpdateCrc(BYTE ch, USHORT *lpwCrc)
{
8)^((USHORT)ch<<3)^((USHORT)ch>>4);
}
void ComputeCrc(char *Data, int Length, BYTE *TransmitFirst, BYTE
*TransmitSecond)
{
BYTE chBlock; USHORTt wCrc;
}
int main(void)
{
BYTE BuffCRC_B[10] = {0x0A, 0x12, 0x34, 0x56}, First, Second, i;
ch = (ch^(BYTE)((*lpwCrc) & 0x00FF));
ch = (ch^(ch<<4));
*lpwCrc = (*lpwCrc >> 8)^((USHORT)ch <<
return(*lpwCrc);
wCrc = 0xFFFF; // ISO 3309
do
wCrc = ~wCrc; // ISO 3309
*TransmitFirst = (BYTE) (wCrc & 0xFF);
*TransmitSecond = (BYTE) ((wCrc >> 8) & 0xFF);
return;
printf("Crc-16 G(x) = x^16 + x^12 + x^5 + 1");
{
chBlock = *Data++;
UpdateCrc(chBlock, &wCrc);
} while (--Length);
ISO14443 type B CRC calculation
Doc ID 11922 Rev 2
CR14