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https://opencores.org/ocsvn/galois_lfsr/galois_lfsr/trunk
[/] [galois_lfsr/] [trunk/] [rtl/] [user.vhdl] - Diff between revs 2 and 3
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Rev 3 |
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/* synthesis translate_on */
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/* synthesis translate_on */
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loadEn<=clk when reset='0' and not i_computed else '0';
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loadEn<=clk when reset='0' and not i_computed else '0';
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computeClk<=clk when reset='0' and i_loaded and not i_computed else '0';
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computeClk<=clk when reset='0' and i_loaded and not i_computed else '0';
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/* CRC computer using LFSR.
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/* Galois LFSR instance. */
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E.g. Design a CRC-32 generator with the following polynomial (CRC-32 algorithm):
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G(x) = x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10
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+ x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + 1
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Equivalent to the following hex code: 0x04C11DB7, with the MSbit discarded (assumed
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present, but discarded in real implementation to save bits as it does not serve
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any other purpose).
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*/
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i_lfsr: entity work.lfsr(rtl)
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i_lfsr: entity work.lfsr(rtl)
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generic map(taps=>tapVector)
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generic map(taps=>tapVector)
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/*generic map(taps => (
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/*generic map(taps => (
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0|1|2|8=>true,
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0|1|2|8=>true,
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7 downto 3=>false
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7 downto 3=>false
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