<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'><span>I had a feeling about the non-standard signals. I'm used to seeing:</span><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac"><br></span></div><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac">____</span></div><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac">CLK</span></div><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac"><br></span></div><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac">____</span></div><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac">Data</span></div><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac"><br></span></div><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac">____</span></div><div><span id="ecfc5ded-6bd2-4fa5-ae76-36cd5f8a39ac">ETC....<br><br>..and also shifting in LSB first. Interesting...<br></span><br>----- Original Message -----<br>From: "Roberto Waltman" <fsim@rwaltman.com><br>To: "Simulator Cockpit Builder's List" <simpits-tech@simpits.org><br>Sent: Thursday, March 3, 2011 1:23:24 PM<br>Subject: Re: [simpits-tech] Need some Serial Communications help....<br><br>>> ....<br>>> So perhaps I need to reverse my data stream and send my MSB first?<br>><br>> I believe so. Page 6 in the data sheet, immediately below Table-2:<br>><br>> "The 12 bits are shifted into the device’s shift register MSB<br>> first using a SPI compatible scheme."<br><br>By the way, this is not standardized. The MSB-LSB order, clock phase,<br>transfer length, etc., change from one SPI device to another.<br><br>Things can get complicated when you have multiple devices connected to the<br>same SPI bus, and you need to continuously reprogram your controller when<br>switching from one device to another.<br><br><br><br>_______________________________________________<br>Simpits-tech mailing list<br>Simpits-tech@simpits.org<br>http://www.simpits.org/mailman/listinfo/simpits-tech<br>To unsubscribe, please see the instructions at the bottom of the above page. Thanks!<br></div></div></body></html>