qt60248 Quantum Research Group, qt60248 Datasheet - Page 26

• Manufacturer Part Number: qt60248
• Description: 16, 24 Key Qmatrix? Ics
• Manufacturer: Quantum Research Group

7 Appendix
7.1 8-Bit CRC Algorithm
// 8 bits crc calculation. Initial value is 0.
// polynomial = X
// data is an 8 bit number;
unsigned char eight_bit_crc(unsigned char crc, unsigned char data)
{ unsigned char index;
}
A CRC calculator for Windows is available free of charge from Quantum Research.
lQ
unsigned char fb;
index = 8;
do
{ fb = (crc ^ data) & 0x01;
} while(--index);
data >>= 1;
crc >>= 1;
If(fb)
{ crc ^= 0x8c;
}
return crc;
8
+ X
5
// initialise the shift counter
+ X
4
+ 1
crc is a 8 bit number
// shift counter
26
QT60248-AS R4.02/0405