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SE-602-N User Manual
1.2.3 CRC
Protocol uses 16-bit CCITT CRC to verify data integrity.
P(x) = X
16
+X
12
+X
5
+1.
unsigned
calc_crc(
unsigned
char
*data,
unsigned
n,
unsigned
start) {
unsigned
I, k, q, c, crcval;
crcval=start;
for
(I=0; I<n; I++) {
c=data(I) & 0xFF;
q=(crcval^c) & 0x0F;
crcval=(crcval>>4)^(q*0x1081);
}
return
crcval;
}
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