[Hackrf-dev] why cpld code adc_data_i xor 0x80 0x7F, what is this mean

[卍]

process(host_clk_i)
 begin
 if rising_edge(host_clk_i) then
 if codec_clk_i = '1' then
 -- I: non-inverted between MAX2837 and MAX5864
 data_to_host_o <= adc_data_i xor X"80";
 else
 -- Q: inverted between MAX2837 and MAX5864
 data_to_host_o <= adc_data_i xor rx_q_invert_mask;
 end if;
 end if;
 end process;
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