2011-05-27 12:31:11 +03:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML>
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2011-05-27 12:31:11 +03:00
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<TITLE>Production and testing</TITLE>
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<BODY bgcolor="#ffffff" link="#000000" vlink="#404040">
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<INCLUDE file="style.inc">
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<PAGE_BAR title="Production and testing">
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<PAGE_ITEM href="setup.html">Software setup</PAGE_ITEM>
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<PAGE_ITEM href="flash.html">Flashing</PAGE_ITEM>
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<PAGE_ITEM href="test.html">Functional test</PAGE_ITEM>
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<PAGE_ITEM href="analysis.html">Fault analysis</PAGE_ITEM>
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</PAGE_BAR>
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<SECTION_BAR>
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2011-05-27 16:45:42 +03:00
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<SECTION_ITEM href="#intro">Introduction</SECTION_ITEM>
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<SECTION_ITEM href="#terminology">Terminology</SECTION_ITEM>
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<SECTION_ITEM href="#details">Detailed description</SECTION_ITEM>
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</SECTION_BAR>
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2011-05-27 16:45:42 +03:00
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<!-- ====================================================================== -->
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<SECTION ref="intro" title="Introduction">
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This document gives a high-level description of the production test process
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for <B>atben</B> and <B>atusb</B> boards, plus - in the case of <B>atusb</B>
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the production steps required between the boards leaving the SMT line and the
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actual testing.
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<P>
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The testing serves two purposes:
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<OL>
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<LI>Ascertain the correctness of the preceding production steps, and
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2011-05-29 16:37:17 +03:00
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<LI>identify boards suffering from random production flaws and either
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discard them or prepare them for repair.
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</OL>
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The results of testing and fault analysis also provide feedback for the
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SMT process and steps preceding it.
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<P>
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The following diagram illustrates the workflow:
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<P>
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<IMG src="flow.png">
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<P>
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Only <B>atusb</B> boards contain firmware and need flashing (which is
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a two-step process, see below). The functional tests and fault
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analysis are largely the same for <B>atben</B> and <B>atusb</B>.
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<P>
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Devices accepted for further use can then be packaged for shipping.
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Defective devices can be discarded or retained for a deeper analysis.
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2011-05-18 20:04:59 +03:00
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<!-- ====================================================================== -->
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2011-05-27 12:31:11 +03:00
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<SECTION ref="terminology" title="Terminology">
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<DL>
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<DT><B><I>Ben</I></B></DT>
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<DD>a device capable of hosting the <B>atben</B> and <B>atusb-pgm</B>
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boards. In the production process, a Ben can perform three different
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roles:
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<OL>
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<LI> Host an <B>atben</B> board acting as DUT
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<LI> Host an <B>atben</B> board acting as reference
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<LI> Host an <B>atusb-pgm</B> used for flashing the boot loader
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</OL>
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In this document, we assume that a single Ben is used in all
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three roles, with the board in its 8:10 card slot changed as
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the role requires.
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<DT><B><I>PC</I></B></DT>
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<DD>a device running Linux. Capable of connecting to a Ben via USB, and
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of hosting an
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<B>atusb</B> board. In the production process, a PC can perform three
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different roles:
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<OL>
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<LI> Host an <B>atusb</B> board acting as DUT
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<LI> Host an <B>atusb</B> board acting as reference
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<LI> Control a Ben via USB (for convenience and to coordinate tests
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involving a sender and a receiver)
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</OL>
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In this document, we assume that a single PC is used in all
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three roles, with one USB host port permanently connecting to the
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Ben, and a second USB host port populated with <B>atusb</B> boards
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as needed.
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<DT><B><I>DUT</I></B></DT>
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<DD>Device Under Test. An <B>atben</B> or <B>atusb</B> board that
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has left SMT, and is being prepared for testing or is in the process
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of being tested.
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<DT><B><I>Reference device</I></B></DT>
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<DD>An <B>atben</B> or <B>atusb</B> device that is known to work and
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and that acts as a peer for RF communication with the DUT.
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<DT><B><I>SMT</I></B></DT>
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<DD>In this context, the actual process of soldering components to
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the unpopulated PCB, and all related tasks providing an input to
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this process. Such related tasks include the configuration of the
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2011-05-18 13:23:11 +03:00
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SMT line, and testing and conditioning of the components prior to
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soldering.
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</DL>
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2011-05-18 20:04:59 +03:00
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<!-- ====================================================================== -->
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2011-05-27 12:31:11 +03:00
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<SECTION ref="details" title="Detailed description">
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2011-05-18 20:04:59 +03:00
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2011-05-18 20:25:54 +03:00
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The following pages describe the preparation and the execution of the
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production and test process:
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<UL>
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<LI><A href="setup.html">Software setup</A>
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<LI><A href="flash.html">Flashing (<B>atusb</B> only)</A>
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<LI><A href="test.html">Functional test</A>
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<LI><A href="analysis.html">Fault analysis</A>
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</UL>
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2011-05-18 20:04:59 +03:00
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2011-05-27 19:14:32 +03:00
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<END author="Werner Almesberger" date="<GEN_DATE>">
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2011-05-18 03:57:18 +03:00
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</BODY>
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</HTML>
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