X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtprh02.spirittelecom.com ([165.166.0.78] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTPS id 2177429 for flyrotary@lancaironline.net; Sat, 14 Jul 2007 11:48:22 -0400 Received-SPF: pass receiver=logan.com; client-ip=165.166.0.78; envelope-from=jewen@comporium.net X-Report-Abuse-To: abuse@spirittelecom.com Received: from engineer1 (208-104-86-186.lnhe.2wcm.comporium.net [208.104.86.186] (may be forged)) by smtprh02.spirittelecom.com (8.13.6/8.13.1) with SMTP id l6EFlhwu021449 for ; Sat, 14 Jul 2007 15:47:44 GMT Message-ID: <012001c7c62e$4f80b9e0$6405a8c0@cooleygroup.local> From: "Joe Ewen" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: NOP was : [FlyRotary] EM2 NOP flashing w/RPM and a couple of other questions Date: Sat, 14 Jul 2007 11:47:40 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_011D_01C7C60C.C841C850" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 X-Virus-Scanned: ClamAV 0.88/3670/Sat Jul 14 05:08:13 2007 on smtprh02.spirittelecom.com X-Virus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_011D_01C7C60C.C841C850 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Tracey is not using the RS-232 standard for either wiring or signal = level. Signal is TTL, TX =3D pin 7, RX =3D pin 27, and GND =3D pin 1 Joe ----- Original Message -----=20 From: Dale Rogers=20 To: Rotary motors in aircraft=20 Sent: Saturday, July 14, 2007 10:59 AM Subject: [FlyRotary] Re: NOP was : [FlyRotary] EM2 NOP flashing w/RPM = and a couple of other questions Just a little amplification to what Ed has said - I've worked with 3-wire RS232 for 27 years.- 8-N-1 (Xon/Xoff). If Tracy is using the standard RS232 wiring convention for the = serial=20 connection, the TX is pin 2, RX is pin 3, but signal ground is not pin = 1,=20 it is pin 7 (DB25 connector) or pin 5 (DB9 connector). The ground on=20 pin 1 of the DB25 is "frame ground" and "signal ground" is not=20 necessarily connected to it (indeed, it ~shouldn't~ be.) =20 Best Regards, Dale R. Ed Anderson wrote:=20 As best I recall, In the programming world, its a mnemonic used to = mean "No Operation"=3D NOP, in other words is was a line of code that = used up a clock cycle(s) of the chip but actually did nothing. = Sometimes used for timing purposes. I think Tracy uses it to mean No Operation. The link between the = EC2 and the EM2 is via three wires, two wires over which data and = control pulses flow and the all important ground wire. If do not have a = good electrical ground between your EM2 and EC2 the serial communication = function will not operate properly or may be sporadic. Since you have = power to your EM2, I would check and see that it has a good ground to = the EC2. Ed -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_011D_01C7C60C.C841C850 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Tracey is not using the = RS-232=20 standard for either wiring or signal level. Signal is TTL, TX =3D = pin 7, RX=20 =3D pin 27, and GND =3D pin 1

Joe

----- Original Message -----
From:=20 Dale = Rogers
To: Rotary motors in = aircraft

Sent: Saturday, July 14, 2007 = 10:59=20 AM

Subject: [FlyRotary] Re: NOP = was :=20 [FlyRotary] EM2 NOP flashing w/RPM and a couple of other = questions

Just a little amplification to what Ed has = said=20 -

   I've worked with 3-wire RS232 for 27 years.- = 8-N-1=20 (Xon/Xoff).

   If Tracy is using the standard RS232 = wiring=20 convention for the serial
connection, the TX is pin 2, RX is pin = 3, but=20 signal ground is not pin 1,
it is pin 7 (DB25 connector) or pin 5 = (DB9=20 connector). The ground on
pin 1 of the DB25 is "frame = ground" and=20 "signal ground" is not
necessarily connected to it (indeed, it = ~shouldn't~=20 be.)

Best Regards,
Dale R.

Ed Anderson = wrote:=20

As best I recall, In the programming world, = its a=20 mnemonic used to mean "No Operation"=3D NOP, in other words is was a = line of=20 code that used up a clock cycle(s) of the chip but actually did=20 nothing. Sometimes used for timing purposes.

I think Tracy uses it to mean No=20 Operation.   The link between the EC2 and the EM2 is via = three=20 wires, two wires over which data and control pulses flow and the all = important ground wire. If do not have a good electrical ground = between=20 your EM2 and EC2 the serial communication function will not operate = properly=20 or may be sporadic. Since you have power to your EM2, I would = check=20 and see that it has a good ground to the EC2.

Ed

-- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html
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