Root/prod/doc/index.hmac

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3<TITLE>Production and testing</TITLE>
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8<PAGE_BAR title="Production and testing">
9  <PAGE_ITEM href="setup.html">Software setup</PAGE_ITEM>
10  <PAGE_ITEM href="flash.html">Flashing</PAGE_ITEM>
11  <PAGE_ITEM href="test.html">Functional test</PAGE_ITEM>
12  <PAGE_ITEM href="analysis.html">Fault analysis</PAGE_ITEM>
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16  <SECTION_ITEM href="#intro">Introduction</SECTION_ITEM>
17  <SECTION_ITEM href="#terminology">Terminology</SECTION_ITEM>
18  <SECTION_ITEM href="#details">Detailed description</SECTION_ITEM>
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25<SECTION ref="intro" title="Introduction">
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27This document gives a high-level description of the production test process
28for <B>atben</B> and <B>atusb</B> boards, plus - in the case of <B>atusb</B>
29the production steps required between the boards leaving the SMT line and the
30actual testing.
31<P>
32The testing serves two purposes:
33<OL>
34  <LI>Ascertain the correctness of the preceding production steps, and
35  <LI>identify boards suffering from random production flaws and either
36    discard them or prepare them for repair.
37</OL>
38The results of testing and fault analysis also provide feedback for the
39SMT process and steps preceding it.
40<P>
41The following diagram illustrates the workflow:
42<P>
43<IMG src="flow.png">
44<P>
45Only <B>atusb</B> boards contain firmware and need flashing (which is
46a two-step process, see below). The functional tests and fault
47analysis are largely the same for <B>atben</B> and <B>atusb</B>.
48<P>
49Devices accepted for further use can then be packaged for shipping.
50Defective devices can be discarded or retained for a deeper analysis.
51
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56<SECTION ref="terminology" title="Terminology">
57
58<DL>
59  <DT><B><I>Ben</I></B></DT>
60  <DD>a device capable of hosting the <B>atben</B> and <B>atusb-pgm</B>
61    boards. In the production process, a Ben can perform three different
62    roles:
63    <OL>
64      <LI> Host an <B>atben</B> board acting as DUT
65      <LI> Host an <B>atben</B> board acting as reference
66      <LI> Host an <B>atusb-pgm</B> used for flashing the boot loader
67    </OL>
68    In this document, we assume that a single Ben is used in all
69    three roles, with the board in its 8:10 card slot changed as
70    the role requires.
71  <DT><B><I>PC</I></B></DT>
72  <DD>a device running Linux. Capable of connecting to a Ben via USB, and
73    of hosting an
74    <B>atusb</B> board. In the production process, a PC can perform three
75    different roles:
76    <OL>
77      <LI> Host an <B>atusb</B> board acting as DUT
78      <LI> Host an <B>atusb</B> board acting as reference
79      <LI> Control a Ben via USB (for convenience and to coordinate tests
80        involving a sender and a receiver)
81    </OL>
82    In this document, we assume that a single PC is used in all
83    three roles, with one USB host port permanently connecting to the
84    Ben, and a second USB host port populated with <B>atusb</B> boards
85    as needed.
86  <DT><B><I>DUT</I></B></DT>
87  <DD>Device Under Test. An <B>atben</B> or <B>atusb</B> board that
88    has left SMT, and is being prepared for testing or is in the process
89    of being tested.
90  <DT><B><I>Reference device</I></B></DT>
91  <DD>An <B>atben</B> or <B>atusb</B> device that is known to work and
92    and that acts as a peer for RF communication with the DUT.
93  <DT><B><I>SMT</I></B></DT>
94  <DD>In this context, the actual process of soldering components to
95    the unpopulated PCB, and all related tasks providing an input to
96    this process. Such related tasks include the configuration of the
97    SMT line, and testing and conditioning of the components prior to
98    soldering.
99</DL>
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105<SECTION ref="details" title="Detailed description">
106
107The following pages describe the preparation and the execution of the
108production and test process:
109<UL>
110  <LI><A href="setup.html">Software setup</A>
111  <LI><A href="flash.html">Flashing (<B>atusb</B> only)</A>
112  <LI><A href="test.html">Functional test</A>
113  <LI><A href="analysis.html">Fault analysis</A>
114</UL>
115
116
117<END author="Werner Almesberger" date="<GEN_DATE>">
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