[Hackrf-dev] why RXBBQ+ connect to QA- (why not QA+)

[卍]

------------------ Original ------------------
From:  "hackrf-dev-request";<hackrf-dev-request at greatscottgadgets.com>;
Date:  Mon, Nov 6, 2017 02:29 PM
To:  "hackrf-dev"<hackrf-dev at greatscottgadgets.com>;

Subject:  HackRF-dev Digest, Vol 62, Issue 1



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Today's Topics:

   1. why cpld code adc_data_i xor 0x80 0x7F, what is this mean
      (=?gb18030?B?hWQ=?=)


----------------------------------------------------------------------

Message: 1
Date: Sun, 5 Nov 2017 21:39:40 +0800
From: "=?gb18030?B?hWQ=?=" <hustpigeon at qq.com>
To: "=?gb18030?B?SGFja1JGLWRldg==?="
	<HackRF-dev at greatscottgadgets.com>
Subject: [Hackrf-dev] why cpld code adc_data_i xor 0x80 0x7F, what is
	this mean
Message-ID: <tencent_28945E1E3ADEE716C2467ACFBCC41874E706 at qq.com>
Content-Type: text/plain; charset="gb18030"

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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