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Altera_Forum
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17 years ago

I want knowing POF file format structures.

hello, everyone. I want knowing POF file format structures. I can open a .pof file and program this to the EPCS16 device if i know the length of the header so i can remove it first. T...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

FWIW the crc is CRC-CCITT as used by hdlc.

This means the the calculation can be reduced to: 

    crc = 0xffff;
    while (p < lim) {
        crc ^= *p++;
        t = (crc ^ crc << 4) & 0xff;
        crc = crc >> 8 ^ t << 8 ^ t << 3 ^ t >> 4;
    crc ^= 0xffff;