<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I've long used USB(H) for true asserted high, and USB(L) for true asserted low, or "not," in digital logic diagrams, and the use of the bar for (L) was used in Boolean math (as in <span style="background-color: rgba(255, 255, 255, 0);">Karnaugh </span>maps). Then there were paper gates, but that is another discussion :-)</div><div><br><div>Thanks,<div>Bob</div><div>kk6ecm</div><div><br></div><div>Sent from iPad<div><div><br></div></div></div></div></div><div><br>On Dec 17, 2015, at 9:54 PM, Tim Sawyer <<a href="mailto:tisawyer@gmail.com">tisawyer@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">In digital electronics high true is resented by the name and low true is represented by the name with a "not bar" over it. Being as it is not possible to include the "not bar" in ASCII config files the word invert is a satisfactory and logical (pun intended) substitute, IMHO.</div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Dec 17, 2015 at 8:33 AM, Doug Crompton <span dir="ltr"><<a href="mailto:doug@crompton.com" target="_blank">doug@crompton.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div dir="ltr"><font face="Tahoma,sans-serif">Barry,</font><br><div><div dir="ltr"><font color="#000000" face="Tahoma,sans-serif"><br> You are absolutely right. There are many things in the entire code that have screwy names and don't consistently relate to the actual operation. I am not sure if that review will make the maintenance update for the current code but it will for our big update coming early next year. <br></font><br><b><font style="font-size:16pt" size="4">73 Doug</font><font style="font-size:16pt" size="4"><br></font><font style="font-size:16pt" size="4">WA3DSP</font><font style="font-size:16pt" size="4"><br></font><font style="font-size:16pt" size="4"><a href="http://www.crompton.com/hamradio" target="_blank">http://www.crompton.com/hamradio</a></font></b><font style="font-size:16pt" size="4"><br></font><br><br><div><hr>Date: Thu, 17 Dec 2015 14:17:35 +0000<br>From: <a href="mailto:bjbuelow@yahoo.com" target="_blank">bjbuelow@yahoo.com</a><br>To: <a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a><br>Subject: [arm-allstar] Heresy<br><br><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:12px"><div><br></div><div>While working on the COR timer, please consider changing the name of "USB" and "USB-invert" to indicate the actual polarity or sense of the signal. Granted this is likely a long standing convention, but it is horribly ambiguous. The sense should be at the point of the signal interfacing to the FOB, GPIO, etc.<br></div><div><br></div><div>consider COR_hi and COR_lo</div><div><br></div><div dir="ltr">or something similar. The same goes for CTCSS and PTT.</div><div dir="ltr"><br></div><div dir="ltr">Barry w0iy</div><div dir="ltr"><br></div><div dir="ltr"><br></div></div><br>_______________________________________________
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Visit the BBB and RPi2 web page - <a href="http://hamvoip.org" rel="noreferrer" target="_blank">http://hamvoip.org</a><br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>--<br></div><div>Tim</div></div></div></div></div>
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