qt1100a Quantum Research Group, qt1100a Datasheet - Page 41

• Manufacturer Part Number: qt1100a
• Description: 10 Key Qtouch? Sensor Ic
• Manufacturer: Quantum Research Group

6 Appendix A - 8-Bit CRC C Algorithm
// 8-bit crc calculation. Initial value is 0.
// polynomial = X
// data is an 8 bit number;
int eight_bit_crc(int crc, int data)
{ int
}
A CRC calculator for Windows is available free of charge from Quantum Research.
LQ
int
index = 8;
do
{ fb = (crc ^ data) & 0x01;
} while(--index);
crc >>= 1;
if(fb)
{
}
return crc;
index;
fb;
data >>= 1;
crc ^= 0x8c;
8
+ X
5
+ X
4
+ 1
crc is an 8-bit number
// initialise the shift counter
41
// shift counter
Copyright © 2003-2005 QRG Ltd
QT1100A-ISG R3.02/1105