-<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>MicroPeak Owner's Manual</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="book"><div class="titlepage"><div><div><h1 class="title"><a name="idp
23675904"></a>MicroPeak Owner's Manual</h1></div><div><h2 class="subtitle">A recording altimeter for hobby rocketry</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Keith</span> <span class="surname">Packard</span></h3></div></div><div><p class="copyright">Copyright © 2014 Bdale Garbee and Keith Packard</p></div><div><div class="legalnotice"><a name="idp50893152"></a><p>
+<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>MicroPeak Owner's Manual</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="book"><div class="titlepage"><div><div><h1 class="title"><a name="idp
19019136"></a>MicroPeak Owner's Manual</h1></div><div><h2 class="subtitle">A recording altimeter for hobby rocketry</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Keith</span> <span class="surname">Packard</span></h3></div></div><div><p class="copyright">Copyright © 2014 Bdale Garbee and Keith Packard</p></div><div><div class="legalnotice"><a name="idp45361792"></a><p>
This document is released under the terms of the
<a class="ulink" href="http://creativecommons.org/licenses/by-sa/3.0/" target="_top">
Creative Commons ShareAlike 3.0
adapter design. Monitor data during download to let you see
if the USB connection is working at all by showing the
characters received from the MicroPeak USB adapter.
- </td></tr></table></div></div></div><hr></div><div class="dedication"><div class="titlepage"><div><div><h1 class="title"><a name="idp
50903680"></a>Acknowledgements</h1></div></div></div><p>
+ </td></tr></table></div></div></div><hr></div><div class="dedication"><div class="titlepage"><div><div><h1 class="title"><a name="idp
46247936"></a>Acknowledgements</h1></div></div></div><p>
Thanks to John Lyngdal for suggesting that we build something like this.
</p><p>
Have fun using these products, and we hope to meet all of you
Keith Packard, KD7SQG<br>
NAR #88757, TRA #12200<br>
</p></div><p>
- </p></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="chapter"><a href="#idp
50906432">1. Quick Start Guide</a></span></dt><dt><span class="chapter"><a href="#idp50193728">2. Handling Precautions</a></span></dt><dt><span class="chapter"><a href="#idp50198112">3. The MicroPeak USB adapter</a></span></dt><dd><dl><dt><span class="section"><a href="#idp50011584">1. Installing the MicroPeak software</a></span></dt><dt><span class="section"><a href="#idp50014672">2. Downloading Micro Peak data</a></span></dt><dt><span class="section"><a href="#idp50037808">3. Analyzing MicroPeak Data</a></span></dt><dd><dl><dt><span class="section"><a href="#idp50041296">3.1. MicroPeak Graphs</a></span></dt><dt><span class="section"><a href="#idp50044896">3.2. MicroPeak Flight Statistics</a></span></dt><dt><span class="section"><a href="#idp50048768">3.3. Raw Data</a></span></dt><dt><span class="section"><a href="#idp55531984">3.4. Configuring the Graph</a></span></dt></dl></dd><dt><span class="section"><a href="#idp55535520">4. Setting MicroPeak Preferences</a></span></dt></dl></dd><dt><span class="chapter"><a href="#idp55545504">4. Technical Information</a></span></dt><dd><dl><dt><span class="section"><a href="#idp55546176">1. Barometric Sensor</a></span></dt><dt><span class="section"><a href="#idp55548928">2. Micro-controller</a></span></dt><dt><span class="section"><a href="#idp55551280">3. Lithium Battery</a></span></dt><dt><span class="section"><a href="#idp55554064">4. Atmospheric Model</a></span></dt><dt><span class="section"><a href="#idp55557040">5. Mechanical Considerations</a></span></dt><dt><span class="section"><a href="#idp55559792">6. On-board data storage</a></span></dt><dt><span class="section"><a href="#idp53369808">7. MicroPeak Programming Interface</a></span></dt></dl></dd></dl></div><div class="list-of-tables"><p><b>List of Tables</b></p><dl><dt>4.1. <a href="#idp55561904">MicroPeak EEPROM Data Storage</a></dt></dl></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp50906432"></a>Chapter 1. Quick Start Guide</h1></div></div></div><p>
+ </p></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="chapter"><a href="#idp
46250688">1. Quick Start Guide</a></span></dt><dt><span class="chapter"><a href="#idp45537136">2. Handling Precautions</a></span></dt><dt><span class="chapter"><a href="#idp45541520">3. The MicroPeak USB adapter</a></span></dt><dd><dl><dt><span class="section"><a href="#idp45545072">1. Installing the MicroPeak software</a></span></dt><dt><span class="section"><a href="#idp45548160">2. Downloading Micro Peak data</a></span></dt><dt><span class="section"><a href="#idp45389376">3. Analyzing MicroPeak Data</a></span></dt><dd><dl><dt><span class="section"><a href="#idp45392864">3.1. MicroPeak Graphs</a></span></dt><dt><span class="section"><a href="#idp45396464">3.2. MicroPeak Flight Statistics</a></span></dt><dt><span class="section"><a href="#idp45400336">3.3. Raw Data</a></span></dt><dt><span class="section"><a href="#idp50875760">3.4. Configuring the Graph</a></span></dt></dl></dd><dt><span class="section"><a href="#idp50879376">4. Setting MicroPeak Preferences</a></span></dt></dl></dd><dt><span class="chapter"><a href="#idp50889408">4. Technical Information</a></span></dt><dd><dl><dt><span class="section"><a href="#idp50890080">1. Barometric Sensor</a></span></dt><dt><span class="section"><a href="#idp50892832">2. Micro-controller</a></span></dt><dt><span class="section"><a href="#idp50895184">3. Lithium Battery</a></span></dt><dt><span class="section"><a href="#idp50897968">4. Atmospheric Model</a></span></dt><dt><span class="section"><a href="#idp50900944">5. Mechanical Considerations</a></span></dt><dt><span class="section"><a href="#idp50903696">6. On-board data storage</a></span></dt><dt><span class="section"><a href="#idp50924032">7. MicroPeak Programming Interface</a></span></dt></dl></dd></dl></div><div class="list-of-tables"><p><b>List of Tables</b></p><dl><dt>4.1. <a href="#idp50905808">MicroPeak EEPROM Data Storage</a></dt></dl></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp46250688"></a>Chapter 1. Quick Start Guide</h1></div></div></div><p>
MicroPeak is designed to be easy to use. Requiring no external
components, flying takes just a few steps
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
Recover the data. Turn MicroPeak off and then back on. MicroPeak
will blink out the maximum height for the last flight. Turn
MicroPeak back off to conserve battery power.
- </p></li></ul></div></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp
50193728"></a>Chapter 2. Handling Precautions</h1></div></div></div><p>
+ </p></li></ul></div></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp
45537136"></a>Chapter 2. Handling Precautions</h1></div></div></div><p>
All Altus Metrum products are sophisticated electronic devices.
When handled gently and properly installed in an air-frame, they
will deliver impressive results. However, as with all electronic
As with all other rocketry electronics, Altus Metrum altimeters must
be protected from exposure to corrosive motor exhaust and ejection
charge gasses.
- </p></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp
50198112"></a>Chapter 3. The MicroPeak USB adapter</h1></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="section"><a href="#idp50011584">1. Installing the MicroPeak software</a></span></dt><dt><span class="section"><a href="#idp50014672">2. Downloading Micro Peak data</a></span></dt><dt><span class="section"><a href="#idp50037808">3. Analyzing MicroPeak Data</a></span></dt><dd><dl><dt><span class="section"><a href="#idp50041296">3.1. MicroPeak Graphs</a></span></dt><dt><span class="section"><a href="#idp50044896">3.2. MicroPeak Flight Statistics</a></span></dt><dt><span class="section"><a href="#idp50048768">3.3. Raw Data</a></span></dt><dt><span class="section"><a href="#idp55531984">3.4. Configuring the Graph</a></span></dt></dl></dd><dt><span class="section"><a href="#idp55535520">4. Setting MicroPeak Preferences</a></span></dt></dl></div><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="MicroPeakUSB-2.0.jpg" width="405"></td></tr></table></div></div><p>
+ </p></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp
45541520"></a>Chapter 3. The MicroPeak USB adapter</h1></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="section"><a href="#idp45545072">1. Installing the MicroPeak software</a></span></dt><dt><span class="section"><a href="#idp45548160">2. Downloading Micro Peak data</a></span></dt><dt><span class="section"><a href="#idp45389376">3. Analyzing MicroPeak Data</a></span></dt><dd><dl><dt><span class="section"><a href="#idp45392864">3.1. MicroPeak Graphs</a></span></dt><dt><span class="section"><a href="#idp45396464">3.2. MicroPeak Flight Statistics</a></span></dt><dt><span class="section"><a href="#idp45400336">3.3. Raw Data</a></span></dt><dt><span class="section"><a href="#idp50875760">3.4. Configuring the Graph</a></span></dt></dl></dd><dt><span class="section"><a href="#idp50879376">4. Setting MicroPeak Preferences</a></span></dt></dl></div><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="MicroPeakUSB-2.0.jpg" width="405"></td></tr></table></div></div><p>
MicroPeak stores barometric pressure information for the first
48 seconds of the flight in on-board non-volatile memory. The
contents of this memory can be downloaded to a computer using
the MicroPeak USB adapter.
- </p><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp
50011584"></a>1. Installing the MicroPeak software</h2></div></div></div><p>
+ </p><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp
45545072"></a>1. Installing the MicroPeak software</h2></div></div></div><p>
The MicroPeak application runs on Linux, Mac OS X and
Windows. You can download the latest version from
<a class="ulink" href="http://altusmetrum.org/AltOS" target="_top">http://altusmetrum.org/AltOS</a>.
be installed. A compatible version of this driver is included
with the MicroPeak application, but you may want to download a
newer version from <a class="ulink" href="http://www.ftdichip.com/FTDrivers.htm" target="_top">http://www.ftdichip.com/FTDrivers.htm</a>.
- </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp
50014672"></a>2. Downloading Micro Peak data</h2></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
+ </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp
45548160"></a>2. Downloading Micro Peak data</h2></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
Plug the MicroPeak USB adapter in to your computer.
</p></li><li class="listitem"><p>
Start the MicroPeak application.
height, speed and acceleration values computed from the
recorded barometric pressure data. See the next section
for more details on that.
- </p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp
50037808"></a>3. Analyzing MicroPeak Data</h2></div></div></div><p>
+ </p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp
45389376"></a>3. Analyzing MicroPeak Data</h2></div></div></div><p>
The MicroPeak application can present flight data in the form
of a graph, a collection of computed statistics or in tabular
form.
Data tab) to a file, change the application Preferences, Close
the current window or close all windows and Exit the
application.
- </p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp
50041296"></a>3.1. MicroPeak Graphs</h3></div></div></div><p>
+ </p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp
45392864"></a>3.1. MicroPeak Graphs</h3></div></div></div><p>
Under the Graph tab, the height, speed and acceleration values
are displayed together. You can zoom in on the graph by
clicking and dragging to sweep out an area of
interest. Right-click on the plot to bring up a menu that will
let you save, copy or print the graph.
- </p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="micropeak-graph.png" width="405"></td></tr></table></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp
50044896"></a>3.2. MicroPeak Flight Statistics</h3></div></div></div><p>
+ </p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="micropeak-graph.png" width="405"></td></tr></table></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp
45396464"></a>3.2. MicroPeak Flight Statistics</h3></div></div></div><p>
The Statistics tab presents overall data from the flight. Note
that the Maximum height value is taken from the minumum
pressure captured in flight, and may be different from the
as fast as the recorded values, or because the true apogee
occurred after the on-board memory was full. Each value is
presented in several units as appropriate.
- </p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="micropeak-statistics.png" width="405"></td></tr></table></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp
50048768"></a>3.3. Raw Data</h3></div></div></div><p>
+ </p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="micropeak-statistics.png" width="405"></td></tr></table></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp
45400336"></a>3.3. Raw Data</h3></div></div></div><p>
A table consisting of the both the raw barometric pressure
data and values computed from that for each recorded time.
- </p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="micropeak-raw-data.png" width="405"></td></tr></table></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp5
5531984"></a>3.4. Configuring the Graph</h3></div></div></div><p>
+ </p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="micropeak-raw-data.png" width="405"></td></tr></table></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp5
0875760"></a>3.4. Configuring the Graph</h3></div></div></div><p>
This selects which graph elements to show, and lets you
switch between metric and imperial units
- </p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="micropeak-graph-configure.png" width="405"></td></tr></table></div></div></div></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
5535520"></a>4. Setting MicroPeak Preferences</h2></div></div></div><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="162"><tr><td><img src="micropeak-preferences.png" width="162"></td></tr></table></div></div><p>
+ </p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="405"><tr><td><img src="micropeak-graph-configure.png" width="405"></td></tr></table></div></div></div></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
0879376"></a>4. Setting MicroPeak Preferences</h2></div></div></div><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" style="cellpadding: 0; cellspacing: 0;" width="162"><tr><td><img src="micropeak-preferences.png" width="162"></td></tr></table></div></div><p>
The MicroPeak application has a few user settings which are
configured through the Preferences dialog, which can be
accessed from the File menu.
Note that MicroPeak shares a subset of the AltosUI
preferences, so if you use both of these applications, change
in one application will affect the other.
- </p></div></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp5
5545504"></a>Chapter 4. Technical Information</h1></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="section"><a href="#idp55546176">1. Barometric Sensor</a></span></dt><dt><span class="section"><a href="#idp55548928">2. Micro-controller</a></span></dt><dt><span class="section"><a href="#idp55551280">3. Lithium Battery</a></span></dt><dt><span class="section"><a href="#idp55554064">4. Atmospheric Model</a></span></dt><dt><span class="section"><a href="#idp55557040">5. Mechanical Considerations</a></span></dt><dt><span class="section"><a href="#idp55559792">6. On-board data storage</a></span></dt><dt><span class="section"><a href="#idp53369808">7. MicroPeak Programming Interface</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp55546176"></a>1. Barometric Sensor</h2></div></div></div><p>
+ </p></div></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="idp5
0889408"></a>Chapter 4. Technical Information</h1></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="section"><a href="#idp50890080">1. Barometric Sensor</a></span></dt><dt><span class="section"><a href="#idp50892832">2. Micro-controller</a></span></dt><dt><span class="section"><a href="#idp50895184">3. Lithium Battery</a></span></dt><dt><span class="section"><a href="#idp50897968">4. Atmospheric Model</a></span></dt><dt><span class="section"><a href="#idp50900944">5. Mechanical Considerations</a></span></dt><dt><span class="section"><a href="#idp50903696">6. On-board data storage</a></span></dt><dt><span class="section"><a href="#idp50924032">7. MicroPeak Programming Interface</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp50890080"></a>1. Barometric Sensor</h2></div></div></div><p>
MicroPeak uses the Measurement Specialties MS5607 sensor. This
has a range of 120kPa to 1kPa with an absolute accuracy of
150Pa and a resolution of 2.4Pa.
designed to smooth out any minor noise in the sensor
values. The flight pressure recorded to non-volatile storage
is unfiltered, coming directly from the pressure sensor.
- </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
5548928"></a>2. Micro-controller</h2></div></div></div><p>
+ </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
0892832"></a>2. Micro-controller</h2></div></div></div><p>
MicroPeak uses an Atmel ATtiny85 micro-controller. This tiny
CPU contains 8kB of flash for the application, 512B of RAM for
temporary data storage and 512B of EEPROM for non-volatile
this mode, the chip consumes only .1μA of power. MicroPeak
uses this mode once the flight has ended to preserve battery
power.
- </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
5551280"></a>3. Lithium Battery</h2></div></div></div><p>
+ </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
0895184"></a>3. Lithium Battery</h2></div></div></div><p>
The CR1025 battery used by MicroPeak holds 30mAh of power,
which is sufficient to run for over 40 hours. Because
MicroPeak powers down on landing, run time includes only time
battery with MicroPeak. If so, many stores carry CR1025
batteries as they are commonly used in small electronic
devices such as flash lights.
- </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
5554064"></a>4. Atmospheric Model</h2></div></div></div><p>
+ </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
0897968"></a>4. Atmospheric Model</h2></div></div></div><p>
MicroPeak contains a fixed atmospheric model which is used to
convert barometric pressure into altitude. The model was
converted into a 469-element piece-wise linear approximation
Because the raw pressure data is recorded to non-volatile
storage, you can use that, along with a more sophisticated
atmospheric model, to compute your own altitude values.
- </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
5557040"></a>5. Mechanical Considerations</h2></div></div></div><p>
+ </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
0900944"></a>5. Mechanical Considerations</h2></div></div></div><p>
MicroPeak is designed to be rugged enough for typical rocketry
applications. It contains two moving parts, the battery holder
and the power switch, which were selected for their
any direction. Because it is a sliding switch, orienting the
switch perpendicular to the direction of rocket travel will
serve to further protect the switch from launch forces.
- </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
5559792"></a>6. On-board data storage</h2></div></div></div><p>
+ </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
0903696"></a>6. On-board data storage</h2></div></div></div><p>
The ATtiny85 has 512 bytes of non-volatile storage, separate
from the code storage memory. The MicroPeak firmware uses this
to store information about the last completed
information captured with the MicroPeak USB adapter. It can
also be read from MicroPeak through any AVR programming
tool.
- </p><div class="table"><a name="idp5
5561904"></a><p class="title"><b>Table 4.1. MicroPeak EEPROM Data Storage</b></p><div class="table-contents"><table summary="MicroPeak EEPROM Data Storage" border="1"><colgroup><col align="center" class="Address"><col align="center" class="Size (bytes)"><col align="left" class="Description"></colgroup><thead><tr><th align="center">Address</th><th align="center">Size (bytes)</th><th align="center">Description</th></tr></thead><tbody><tr><td align="center">0x000</td><td align="center">4</td><td align="left">Average ground pressure (Pa)</td></tr><tr><td align="center">0x004</td><td align="center">4</td><td align="left">Minimum flight pressure (Pa)</td></tr><tr><td align="center">0x008</td><td align="center">2</td><td align="left">Number of in-flight samples</td></tr><tr><td align="center">0x00a … 0x1fe</td><td align="center">2</td><td align="left">Instantaneous flight pressure (Pa) low 16 bits</td></tr></tbody></table></div></div><br class="table-break"><p>
+ </p><div class="table"><a name="idp5
0905808"></a><p class="title"><b>Table 4.1. MicroPeak EEPROM Data Storage</b></p><div class="table-contents"><table summary="MicroPeak EEPROM Data Storage" border="1"><colgroup><col align="center" class="Address"><col align="center" class="Size (bytes)"><col align="left" class="Description"></colgroup><thead><tr><th align="center">Address</th><th align="center">Size (bytes)</th><th align="center">Description</th></tr></thead><tbody><tr><td align="center">0x000</td><td align="center">4</td><td align="left">Average ground pressure (Pa)</td></tr><tr><td align="center">0x004</td><td align="center">4</td><td align="left">Minimum flight pressure (Pa)</td></tr><tr><td align="center">0x008</td><td align="center">2</td><td align="left">Number of in-flight samples</td></tr><tr><td align="center">0x00a … 0x1fe</td><td align="center">2</td><td align="left">Instantaneous flight pressure (Pa) low 16 bits</td></tr></tbody></table></div></div><br class="table-break"><p>
All EEPROM data are stored least-significant byte first. The
instantaneous flight pressure data are stored without the
upper 16 bits of data. The upper bits can be reconstructed
25°C. So, you can count on the pressure data being accurate,
but speed or acceleration data computed from this will be
limited by the accuracy of this clock.
- </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
3369808"></a>7. MicroPeak Programming Interface</h2></div></div></div><p>
+ </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp5
0924032"></a>7. MicroPeak Programming Interface</h2></div></div></div><p>
MicroPeak exposes a standard 6-pin AVR programming interface,
but not using the usual 2x3 array of pins on 0.1"
centers. Instead, there is a single row of tiny 0.60mm ×
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