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| author | Bdale Garbee <bdale@gag.com> | 2013-01-29 17:28:03 +1100 |
|---|---|---|
| committer | Bdale Garbee <bdale@gag.com> | 2013-01-29 17:28:03 +1100 |
| commit | 662c6d11070360d1698962e30f076ded035f29fd (patch) | |
| tree | 6f702d2f97e3b0566f62fc6ff9720c585a5ccaaf | |
| parent | 7140e404a2fab6dfc5d545c0346f7b53dbb4c995 (diff) | |
| parent | 9bb2ee8190871aacfe6ee7aab7c2905e7231430b (diff) | |
Merge branch 'master' of ssh://git.gag.com/scm/git/web/altusmetrum
23 files changed, 822 insertions, 85 deletions
diff --git a/AltOS/Win8.mdwn b/AltOS/Win8.mdwn new file mode 100644 index 0000000..6cc99bc --- /dev/null +++ b/AltOS/Win8.mdwn @@ -0,0 +1,24 @@ +# Installing AltosUI on Windows 8 + +Windows 8 places additional barriers to installing software beyond +those present in Windows 7. In particular, trying to use the standard +Windows USB modem driver on new hardware now requires 'driver signing' +for the text file that tells Windows to use the driver that it already +has installed. + +Until we figure out what is necessary to make this work the 'right' +way, here are a couple of pointers to sites that should help you +install the current AltosUI bits on your Windows 8 machine. + +## The official Microsoft link + +Here's a link to an official [Microsoft answer](http://answers.microsoft.com/en-us/windows/forum/windows_8-hardware/how-to-install-a-driver-that-does-not-contain/7c3f299b-3483-4c96-8c44-87c7451af222) +for how you are supposed to get Windows 8 to install Windows 7 drivers. + +## An unofficial video link + +And here's a (more helpful in my opinion) [video](http://firstpost.com/topic/product/windows-8-how-to-fix-the-third-party-inf-does-not-contain-digital-sign-video-dlYGfJM2BJ0-91565-1.html) +which will lead you through the necessary steps. + +Our friend, Bob Brown from the Kloudbusters used the video +instructions and reports that things are working just fine now! diff --git a/AltOS/doc/micropeak.html b/AltOS/doc/micropeak.html index cadb1d5..8a0f85c 100644 --- a/AltOS/doc/micropeak.html +++ b/AltOS/doc/micropeak.html @@ -1,4 +1,4 @@ -<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 V1.76.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="book" title="MicroPeak Owner's Manual"><div class="titlepage"><div><div><h1 class="title"><a name="idm14762280"></a>MicroPeak Owner's Manual</h1></div><div><h2 class="subtitle">A peak-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 © 2012 Bdale Garbee and Keith Packard</p></div><div><div class="legalnotice" title="Legal Notice"><a name="idp172816"></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 V1.76.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="book" title="MicroPeak Owner's Manual"><div class="titlepage"><div><div><h1 class="title"><a name="idm14841928"></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 © 2012 Bdale Garbee and Keith Packard</p></div><div><div class="legalnotice" title="Legal Notice"><a name="idp108880"></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 @@ -6,7 +6,15 @@ license. </p></div></div><div><div class="revhistory"><table border="1" width="100%" summary="Revision history"><tr><th align="left" valign="top" colspan="2"><b>Revision History</b></th></tr><tr><td align="left">Revision 0.1</td><td align="left">29 October 2012</td></tr><tr><td align="left" colspan="2"> Initial release with preliminary hardware. - </td></tr></table></div></div></div><hr></div><div class="acknowledgements" title="Acknowledgements"><div class="titlepage"><div><div><h2 class="title"><a name="idp174776"></a>Acknowledgements</h2></div></div></div> + </td></tr><tr><td align="left">Revision 1.0</td><td align="left">18 November 2012</td></tr><tr><td align="left" colspan="2"> + Updates for version 1.0 release. + </td></tr><tr><td align="left">Revision 1.1</td><td align="left">12 December 2012</td></tr><tr><td align="left" colspan="2"> + Add comments about EEPROM storage format and programming jig. + </td></tr><tr><td align="left">Revision 1.2</td><td align="left">20 January 2013</td></tr><tr><td align="left" colspan="2"> + Add documentation for the MicroPeak USB adapter board. Note + the switch to a Kalman filter for peak altitude + determination. + </td></tr></table></div></div></div><hr></div><div class="acknowledgements" title="Acknowledgements"><div class="titlepage"><div><div><h2 class="title"><a name="idp772792"></a>Acknowledgements</h2></div></div></div> <p> Thanks to John Lyngdal for suggesting that we build something like this. </p> @@ -21,7 +29,7 @@ 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><dt><span class="chapter"><a href="#idp176024">1. Quick Start Guide</a></span></dt><dt><span class="chapter"><a href="#idp1555544">2. Handling Precautions</a></span></dt><dt><span class="chapter"><a href="#idp1561440">3. Technical Information</a></span></dt><dd><dl><dt><span class="section"><a href="#idp3211240">1. Barometric Sensor</a></span></dt><dt><span class="section"><a href="#idp1961960">2. Micro-controller</a></span></dt><dt><span class="section"><a href="#idp2901888">3. Lithium Battery</a></span></dt><dt><span class="section"><a href="#idp1674792">4. Atmospheric Model</a></span></dt><dt><span class="section"><a href="#idp1421872">5. Mechanical Considerations</a></span></dt></dl></dd></dl></div><div class="chapter" title="Chapter 1. Quick Start Guide"><div class="titlepage"><div><div><h2 class="title"><a name="idp176024"></a>Chapter 1. Quick Start Guide</h2></div></div></div><p> + </div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="chapter"><a href="#idp774040">1. Quick Start Guide</a></span></dt><dt><span class="chapter"><a href="#idp3062232">2. Handling Precautions</a></span></dt><dt><span class="chapter"><a href="#idp2529968">3. The MicroPeak USB adapter</a></span></dt><dd><dl><dt><span class="section"><a href="#idp2069328">1. Installing the MicroPeak software</a></span></dt><dt><span class="section"><a href="#idp1986896">2. Downloading Micro Peak data</a></span></dt><dt><span class="section"><a href="#idp3318344">3. Analyzing MicroPeak Data</a></span></dt><dt><span class="section"><a href="#idp785616">4. Configuring the MicroPeak application</a></span></dt></dl></dd><dt><span class="chapter"><a href="#idp3018560">4. Technical Information</a></span></dt><dd><dl><dt><span class="section"><a href="#idp3018880">1. Barometric Sensor</a></span></dt><dt><span class="section"><a href="#idp3020504">2. Micro-controller</a></span></dt><dt><span class="section"><a href="#idp3022056">3. Lithium Battery</a></span></dt><dt><span class="section"><a href="#idp3023856">4. Atmospheric Model</a></span></dt><dt><span class="section"><a href="#idp3025920">5. Mechanical Considerations</a></span></dt><dt><span class="section"><a href="#idp3027624">6. On-board data storage</a></span></dt><dt><span class="section"><a href="#idp52184">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="#idp3028936">MicroPeak EEPROM Data Storage</a></dt></dl></div><div class="chapter" title="Chapter 1. Quick Start Guide"><div class="titlepage"><div><div><h2 class="title"><a name="idp774040"></a>Chapter 1. Quick Start Guide</h2></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" type="disc"><li class="listitem"><p> @@ -35,7 +43,8 @@ NAR #88757, TRA #12200<br> preparing a soft cushion of wadding inside a vented model payload bay. Wherever you mount it, make sure you protect the barometric sensor from corrosive ejection gasses as those - will damage the sensor. + will damage the sensor, and shield it from light as that can + cause incorrect sensor readings. </p></li><li class="listitem"><p> Turn MicroPeak on. Slide the switch so that the actuator covers the '1' printed on the board. MicroPeak will report @@ -68,11 +77,10 @@ NAR #88757, TRA #12200<br> pressure and blink that value out on the LED. After that, MicroPeak powers down to conserve battery power. </p></li><li class="listitem"><p> - Recover the data. Turn MicroPeak off for a couple of seconds - (to discharge the capacitors) and then back on. MicroPeak + 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" title="Chapter 2. Handling Precautions"><div class="titlepage"><div><div><h2 class="title"><a name="idp1555544"></a>Chapter 2. Handling Precautions</h2></div></div></div><p> + </p></li></ul></div></div><div class="chapter" title="Chapter 2. Handling Precautions"><div class="titlepage"><div><div><h2 class="title"><a name="idp3062232"></a>Chapter 2. Handling Precautions</h2></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 @@ -86,14 +94,13 @@ NAR #88757, TRA #12200<br> Thus we recommend that you take some care when handling MicroPeak to keep conductive material from coming in contact with the exposed metal elements. </p><p> - The barometric sensors used in MicroPeak is - sensitive to sunlight. Please consider this when - designing an installation, for example, in an air-frame with a - see-through plastic payload bay. Many model rockets with payload bays - use clear plastic for the payload bay. Replacing these with an opaque - cardboard tube, painting them, or wrapping them with a layer of masking - tape are all reasonable approaches to keep the sensor out of direct - sunlight. + The barometric sensor used in MicroPeak is sensitive to + sunlight. Please consider this when designing an + installation. Many model rockets with payload bays use clear + plastic for the payload bay. Replacing these with an opaque + cardboard tube, painting them, or wrapping them with a layer of + masking tape are all reasonable approaches to keep the sensor + out of direct sunlight. </p><p> The barometric sensor sampling ports must be able to "breathe", both by not being covered by foam or tape or other materials that might @@ -103,7 +110,119 @@ NAR #88757, TRA #12200<br> 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" title="Chapter 3. Technical Information"><div class="titlepage"><div><div><h2 class="title"><a name="idp1561440"></a>Chapter 3. Technical Information</h2></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="section"><a href="#idp3211240">1. Barometric Sensor</a></span></dt><dt><span class="section"><a href="#idp1961960">2. Micro-controller</a></span></dt><dt><span class="section"><a href="#idp2901888">3. Lithium Battery</a></span></dt><dt><span class="section"><a href="#idp1674792">4. Atmospheric Model</a></span></dt><dt><span class="section"><a href="#idp1421872">5. Mechanical Considerations</a></span></dt></dl></div><div class="section" title="1. Barometric Sensor"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp3211240"></a>1. Barometric Sensor</h2></div></div></div><p> + </p></div><div class="chapter" title="Chapter 3. The MicroPeak USB adapter"><div class="titlepage"><div><div><h2 class="title"><a name="idp2529968"></a>Chapter 3. The MicroPeak USB adapter</h2></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="section"><a href="#idp2069328">1. Installing the MicroPeak software</a></span></dt><dt><span class="section"><a href="#idp1986896">2. Downloading Micro Peak data</a></span></dt><dt><span class="section"><a href="#idp3318344">3. Analyzing MicroPeak Data</a></span></dt><dt><span class="section"><a href="#idp785616">4. Configuring the MicroPeak application</a></span></dt></dl></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" title="1. Installing the MicroPeak software"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp2069328"></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>. + </p><p> + On Mac OS X and Windows, the FTDI USB device driver needs to + 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" title="2. Downloading Micro Peak data"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp1986896"></a>2. Downloading Micro Peak data</h2></div></div></div><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p> + Connect the MicroPeak USB adapter to a USB cable and plug it + in to your computer. + </p></li><li class="listitem"><p> + Start the MicroPeak application, locate the File menu and + select the Download entry. + </p></li><li class="listitem"><p> + The MicroPeak USB adapter has a small phototransistor on the + end of the board furthest from the USB connector. Locate + this and place the LED on the MicroPeak right over + it. Turn on the MicroPeak board and adjust the position + until the blue LED on the MicroPeak USB adapter blinks in + time with the orange LED on the MicroPeak board. + </p></li><li class="listitem"><p> + After the maximum flight height is reported, MicroPeak will + pause for a few seconds, blink the LED four times rapidly + and then send the data in one long blur on the LED. The + MicroPeak application should receive the data. When it does, + it will present the data in a graph and offer to save the + data to a file. If not, you can power cycle the MicroPeak + board and try again. + </p></li></ul></div></div><div class="section" title="3. Analyzing MicroPeak Data"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp3318344"></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. + </p><p> + MicroPeak collects raw barometric pressure data which is + then used to compute the remaining data. Altitude is computed + through a standard atmospheric model. Absolute error in this + data will be affected by local atmospheric + conditions. Fortunately, these errors tend to mostly cancel + out, so the error in the height computation is much smaller + than the error in altitude would be. + </p><p> + Speed and acceleration are computed by first smoothing the + height data with a Gaussian window averaging filter. For speed + data, this average uses seven samples. For acceleration data, + eleven samples are used. These were chosen to provide + reasonably smooth speed and acceleration data, which would + otherwise be swamped with noise. + </p><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><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 + apparant apogee value as the on-board data are sampled twice + 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><p> + A table consisting of the both the raw barometric pressure + data and values computed from that for each recorded time. + </p><p> + The File menu has operations to open existing flight logs, + Download new data from MicroPeak, Save a copy of the flight + log to a new file, Export the tabular data (as seen in the Raw + Data tab) to a file, change the application Preferences, Close + the current window or close all windows and Exit the + application. + </p></div><div class="section" title="4. Configuring the MicroPeak application"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp785616"></a>4. Configuring the MicroPeak application</h2></div></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. + </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p> + The Log Directory is where flight data will be saved to + and loaded from by default. Of course, you can always + navigate to other directories in the file chooser windows, + this setting is just the starting point. + </p></li><li class="listitem"><p> + If you prefer to see your graph data in feet and + miles per hour instead of meters and meters per second, + you can select Imperial Units. + </p></li><li class="listitem"><p> + To see what data is actually arriving over the serial + port, start the MicroPeak application from a command + prompt and select the Serial Debug option. This can be + useful in debugging serial communication problems, but + most people need never choose this. + </p></li><li class="listitem"><p> + You can adjust the size of the text in the Statistics tab + by changing the Font size preference. There are three + settings, with luck one will both fit on your screen and + provide readable values. + </p></li><li class="listitem"><p> + The Look & feel menu shows a list of available + application appearance choices. By default, the MicroPeak + application tries to blend in with other applications, but + you may choose some other appearance if you like. + </p></li></ul></div><p> + </p><p> + 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" title="Chapter 4. Technical Information"><div class="titlepage"><div><div><h2 class="title"><a name="idp3018560"></a>Chapter 4. Technical Information</h2></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="section"><a href="#idp3018880">1. Barometric Sensor</a></span></dt><dt><span class="section"><a href="#idp3020504">2. Micro-controller</a></span></dt><dt><span class="section"><a href="#idp3022056">3. Lithium Battery</a></span></dt><dt><span class="section"><a href="#idp3023856">4. Atmospheric Model</a></span></dt><dt><span class="section"><a href="#idp3025920">5. Mechanical Considerations</a></span></dt><dt><span class="section"><a href="#idp3027624">6. On-board data storage</a></span></dt><dt><span class="section"><a href="#idp52184">7. MicroPeak Programming Interface</a></span></dt></dl></div><div class="section" title="1. Barometric Sensor"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp3018880"></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. @@ -115,9 +234,9 @@ NAR #88757, TRA #12200<br> </p><p> Ground pressure is computed from an average of 16 samples, taken while the altimeter is at rest. Flight pressure is - computed from an exponential IIR filter designed to smooth out - transients caused by mechanical stress on the barometer. - </p></div><div class="section" title="2. Micro-controller"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp1961960"></a>2. Micro-controller</h2></div></div></div><p> + computed from a Kalman filter designed to smooth out any minor + noise in the sensor values. + </p></div><div class="section" title="2. Micro-controller"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp3020504"></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 @@ -128,9 +247,9 @@ NAR #88757, TRA #12200<br> 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" title="3. Lithium Battery"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp2901888"></a>3. Lithium Battery</h2></div></div></div><p> + </p></div><div class="section" title="3. Lithium Battery"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp3022056"></a>3. Lithium Battery</h2></div></div></div><p> The CR1025 battery used by MicroPeak holes 30mAh of power, - which is sufficient to run for over 15 hours. Because + which is sufficient to run for over 40 hours. Because MicroPeak powers down on landing, run time includes only time sitting on the launch pad or during flight. </p><p> @@ -141,11 +260,11 @@ NAR #88757, TRA #12200<br> battery holder. A small pad on the circuit board makes contact with the negative battery terminal. </p><p> - Shipping restrictions prevent us from including a CR1025 - battery with MicroPeak. Many stores carry CR1025 batteries as - they are commonly used in small electronic devices such as - flash lights. - </p></div><div class="section" title="4. Atmospheric Model"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp1674792"></a>4. Atmospheric Model</h2></div></div></div><p> + Shipping restrictions may prevent us from including a CR1025 + 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" title="4. Atmospheric Model"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp3023856"></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 @@ -161,7 +280,7 @@ NAR #88757, TRA #12200<br> altitude is subtracted from the computed apogee altitude, so the resulting height is more accurate than either the ground or apogee altitudes. - </p></div><div class="section" title="5. Mechanical Considerations"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp1421872"></a>5. Mechanical Considerations</h2></div></div></div><p> + </p></div><div class="section" title="5. Mechanical Considerations"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp3025920"></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 @@ -177,4 +296,65 @@ NAR #88757, TRA #12200<br> 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" title="6. On-board data storage"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp3027624"></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 + flight. Barometric measurements from the ground before launch + and at apogee are stored, and used at power-on to compute the + height of the last flight. + </p><p> + In addition to the data used to present the height of the last + flight, MicroPeak also stores barometric information sampled + at regular intervals during the flight. This information can + be extracted from MicroPeak through any AVR programming + tool. + </p><div class="table"><a name="idp3028936"></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 + from the previous sample, assuming that pressure doesn't + change by more more than 32kPa in a single sample + interval. Note that this pressure data is <span class="emphasis"><em>not</em></span> + filtered in any way, while both the recorded ground and apogee + pressure values are, so you shouldn't expect the minimum + instantaneous pressure value to match the recorded minimum + pressure value exactly. + </p><p> + MicroPeak samples pressure every 96ms, but stores only every + other sample in the EEPROM. This provides for 251 pressure + samples at 192ms intervals, or 48.192s of storage. The clock + used for these samples is a factory calibrated RC circuit + built into the ATtiny85 and is accurate only to within ±10% at + 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" title="7. MicroPeak Programming Interface"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp52184"></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 × + 0.85mm pads on 1.20mm centers exposed near the edge of the + circuit board. We couldn't find any connector that was + small enough to include on the circuit board. + </p><p> + In lieu of an actual connector, the easiest way to connect to + the bare pads is through a set of Pogo pins. These + spring-loaded contacts are designed to connect in precisely + this way. We've designed a programming jig, the MicroPeak + Pogo Pin board which provides a standard AVR interface on one + end and a recessed slot for MicroPeak to align the board with + the Pogo Pins. + </p><p> + The MicroPeak Pogo Pin board is not a complete AVR programmer, + it is an interface board that provides a 3.3V regulated power + supply to run the MicroPeak via USB and a standard 6-pin AVR + programming interface with the usual 2x3 grid of pins on 0.1" + centers. This can be connected to any AVR programming + dongle. + </p><p> + The AVR programming interface cannot run faster than ¼ of the + AVR CPU clock frequency. Because MicroPeak runs at 250kHz to + save power, you must configure your AVR programming system to + clock the AVR programming interface at no faster than + 62.5kHz, or a clock period of 32µS. </p></div></div></div></body></html> diff --git a/AltOS/doc/micropeak.pdf b/AltOS/doc/micropeak.pdf Binary files differindex 63aece9..3dd1476 100644 --- a/AltOS/doc/micropeak.pdf +++ b/AltOS/doc/micropeak.pdf diff --git a/AltOS/index.mdwn b/AltOS/index.mdwn index 21c592f..156e02b 100644 --- a/AltOS/index.mdwn +++ b/AltOS/index.mdwn @@ -29,6 +29,10 @@ in [html](doc/altos.html) and [pdf](doc/altos.pdf) formats, and a document describing the AltOS over the radio protocol in [html](doc/telemetry.html) and [pdf](doc/telemetry.pdf) formats. +If you're running Windows 8, you should take a look at [Installing AltosUI on +Windows 8](Win8) which will help you install the operating system +drivers needed to communicate with the USB hardware. + [[!inline pages="./releases/* and !*/Discussion and !*.html and !*.bz2 and !*.zip and !*.exe" show="10" rss="no" raw="yes" ]] ## Source Code ## diff --git a/MPSerial/index.mdwn b/MPSerial/index.mdwn deleted file mode 100644 index 095b57d..0000000 --- a/MPSerial/index.mdwn +++ /dev/null @@ -1,54 +0,0 @@ -[[!meta title="MPSerial"]] -<img src="../logos/micropeak-oneline.svg" height="100"/> - -# MicroPeak Serial Interface (MPSerial) # - -The MicroPeak Serial Interface board provides a way to capture flight -logs over a USB connection to a computer running Linux, Mac OS or -Windows. - -Here's a picture of the prototype. - -<a href="v0.1/mpserial.jpg"><img src="v0.1/mpserial-640.jpg"></a> - -The final board will have an LED to help check alignment between the -MicroPeak LED and the MicroPeak Serial phototransistor. - -## MicroPeak Data ## - - * Stored in on-chip 512B eeprom - * Records raw barometer readings every 192ms - * Enough storage for 48 seconds - -No changes are needed to the MicroPeak hardware, but new firmware that -includes the data download feature is necessary to use the MicroPeak -Serial Interface. - -## MicroPeak Interface ## - -MicroPeak transmits the entire flight log via the LED just after -reporting the last flight altitude at power up. The data are -transmitted in regular serial format at 9600 baud. - -The MicroPeak Serial Interface board contains a phototransistor, -op-amp and serial-to-USB interface chip. - -## Developer View ## - -Here's a close-up view of the hardware - - * Hardware Features - * ROHM RPM-075PT Phototransistor - * Peak sensitivity matches MicroPeak LED color - * [ST Micro TSV521](http://www.st.com/internet/analog/product/251123.jsp) CMOS op-amp - * Low power - * [FTDI FT230](http://www.ftdichip.com/Products/ICs/FT230X.html) Serial to USB adapter - * Drivers available for Linux, Mac OS X and Windows. - - * Tools Used - * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout - - * Licenses - * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html) - -<center><img src="../logos/micropeak.svg" height="64"/> diff --git a/MicroPeak/index.mdwn b/MicroPeak/index.mdwn index 05e432e..5938b00 100644 --- a/MicroPeak/index.mdwn +++ b/MicroPeak/index.mdwn @@ -13,12 +13,31 @@ Production units are available from the [Garbee and Garbee](http://auric.gag.com/index.php?route=product/product&product_id=80) web store and [Apogee Components](http://www.apogeerockets.com/Electronics_Payloads/Altimeters/MicroPeak_Altimeter) +Data download is available using the [MicroPeak USB adapter](../MicroPeakUSB). + ## Documentation ## The MicroPeak manual is available in [html](../AltOS/doc/micropeak.html) and [pdf](../AltOS/doc/micropeak.pdf) formats. +## Software ## + +The MicroPeak application runs on Linux, Mac OS X and Windows. It +communicates with the [MicroPeak USB adapter](../MicroPeakUSB) to download and analyze +flight data. It's written in [Java](http://java.com) and offers the +same functionality and interface on all three platforms. It uses the +FTDI USB Serial drivers to communicate with the hardware. If you're +running Mac OS X or Windows, a compatible version of those drivers is +included with the software. You can also install a different from from +the [FTDI Driver](http://www.ftdichip.com/FTDrivers.htm) page. + +### Latest version ### + + * [Windows](releases/1.2/MicroPeak-Windows-1-1-9-3.exe) + * [Linux](releases/1.2/MicroPeak-Linux-1.1.9.3.tar.bz2) + * [Mac OS X](releases/1.2/MicroPeak-Mac-1.1.9.3.dmg) + ## Hardware Features ## * Measure ground pressure and peak altitude pressure. diff --git a/MicroPeak/releases.mdwn b/MicroPeak/releases.mdwn new file mode 100644 index 0000000..60c68c4 --- /dev/null +++ b/MicroPeak/releases.mdwn @@ -0,0 +1 @@ +[[!map pages="MicroPeak/releases/* and ! MicroPeak/releases/*/*"]] diff --git a/MicroPeak/releases/1.2.mdwn b/MicroPeak/releases/1.2.mdwn new file mode 100644 index 0000000..7ead9f1 --- /dev/null +++ b/MicroPeak/releases/1.2.mdwn @@ -0,0 +1 @@ +[[!map pages="MicroPeak/releases/1.2/* and ! MicroPeak/releases/1.2/*/*"]] diff --git a/MicroPeak/releases/1.2/MicroPeak-Linux-1.1.9.3.tar.bz2 b/MicroPeak/releases/1.2/MicroPeak-Linux-1.1.9.3.tar.bz2 Binary files differnew file mode 100644 index 0000000..ff6c0f4 --- /dev/null +++ b/MicroPeak/releases/1.2/MicroPeak-Linux-1.1.9.3.tar.bz2 diff --git a/MicroPeak/releases/1.2/MicroPeak-Mac-1.1.9.3.dmg b/MicroPeak/releases/1.2/MicroPeak-Mac-1.1.9.3.dmg Binary files differnew file mode 100644 index 0000000..5f206dc --- /dev/null +++ b/MicroPeak/releases/1.2/MicroPeak-Mac-1.1.9.3.dmg diff --git a/MicroPeak/releases/1.2/MicroPeak-Windows-1-1-9-3.exe b/MicroPeak/releases/1.2/MicroPeak-Windows-1-1-9-3.exe Binary files differnew file mode 100644 index 0000000..aa1c974 --- /dev/null +++ b/MicroPeak/releases/1.2/MicroPeak-Windows-1-1-9-3.exe diff --git a/MicroPeakUSB.mdwn b/MicroPeakUSB.mdwn new file mode 100644 index 0000000..9134c5b --- /dev/null +++ b/MicroPeakUSB.mdwn @@ -0,0 +1 @@ +[[!map pages="MicroPeakUSB/* and ! MicroPeakUSB/*/*"]] diff --git a/MicroPeakUSB/index.mdwn b/MicroPeakUSB/index.mdwn new file mode 100644 index 0000000..e5c4c78 --- /dev/null +++ b/MicroPeakUSB/index.mdwn @@ -0,0 +1,60 @@ +[[!meta title="MicroPeakUSB"]] +<img src="../logos/micropeak-usb-oneline.svg" height="100"/> + +# MicroPeak USB Interface # + +The MicroPeak USB Interface board provides a way to capture +[MicroPeak](../MicroPeak/) flight logs over a USB connection to a +computer running Linux, Mac OS or Windows. + +<a href="v1.0/MicroPeakUSB.jpg"><img src="v1.0/MicroPeakUSB-640.jpg"></a> + +## MicroPeak Data ## + + * Stored in on-chip 512B eeprom + * Records raw barometer readings every 192ms + * Enough storage for 48 seconds + +No changes are needed to the [MicroPeak](../MicroPeak/) hardware, but new firmware that +includes the data download feature is necessary to use the MicroPeak +USB Interface. + +## MicroPeak Interface ## + +[MicroPeak](../MicroPeak/) transmits the entire flight log via the LED just after +reporting the last flight altitude at power up. The data are +transmitted in regular serial format at 9600 baud. + +The MicroPeak USB Interface board contains a phototransistor, +op-amp and serial-to-USB interface chip. It also includes a blue LED +which blinks in time with the [MicroPeak](../MicroPeak/) orange LED. This makes +aligning the two boards by hand quite easy. + +## MicroPeak Application ## + +The MicroPeak application is written in Java application and runs on +Windows, Mac OS X and Windows. Captures and saves data, provides +plots and statistics. More information is available on the main +[MicroPeak](../MicroPeak/) page. + +<img src="micropeak-graph.png"/> + +## Developer View ## + +Here's a close-up view of the hardware + + * Hardware Features + * ROHM RPM-075PT Phototransistor + * Peak sensitivity matches MicroPeak LED color + * [ST Micro TSV521](http://www.st.com/internet/analog/product/251123.jsp) CMOS op-amp + * Low power + * [FTDI FT230](http://www.ftdichip.com/Products/ICs/FT230X.html) Serial to USB adapter + * Drivers available for Linux, Mac OS X and Windows. + + * Tools Used + * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout + + * Licenses + * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html) + +<center><img src="../logos/micropeak-usb.svg" height="64"/> diff --git a/MicroPeakUSB/micropeak-graph.png b/MicroPeakUSB/micropeak-graph.png Binary files differnew file mode 100644 index 0000000..17f4727 --- /dev/null +++ b/MicroPeakUSB/micropeak-graph.png diff --git a/MPSerial/v0.1.mdwn b/MicroPeakUSB/v0.1.mdwn index c26c2b6..c26c2b6 100644 --- a/MPSerial/v0.1.mdwn +++ b/MicroPeakUSB/v0.1.mdwn diff --git a/MPSerial/v0.1/mpserial-640.jpg b/MicroPeakUSB/v0.1/mpserial-640.jpg Binary files differindex 92a9ea3..92a9ea3 100644 --- a/MPSerial/v0.1/mpserial-640.jpg +++ b/MicroPeakUSB/v0.1/mpserial-640.jpg diff --git a/MPSerial/v0.1/mpserial.jpg b/MicroPeakUSB/v0.1/mpserial.jpg Binary files differindex d9c8972..d9c8972 100644 --- a/MPSerial/v0.1/mpserial.jpg +++ b/MicroPeakUSB/v0.1/mpserial.jpg diff --git a/MicroPeakUSB/v1.0.mdwn b/MicroPeakUSB/v1.0.mdwn new file mode 100644 index 0000000..601b5f0 --- /dev/null +++ b/MicroPeakUSB/v1.0.mdwn @@ -0,0 +1 @@ +[[!map pages="MicroPeakUSB/v1.0/* and ! MicroPeakUSB/v1.0/*/*"]] diff --git a/MicroPeakUSB/v1.0/MicroPeakUSB-640.jpg b/MicroPeakUSB/v1.0/MicroPeakUSB-640.jpg Binary files differnew file mode 100644 index 0000000..7ffd137 --- /dev/null +++ b/MicroPeakUSB/v1.0/MicroPeakUSB-640.jpg diff --git a/MicroPeakUSB/v1.0/MicroPeakUSB.jpg b/MicroPeakUSB/v1.0/MicroPeakUSB.jpg Binary files differnew file mode 100644 index 0000000..52dfc27 --- /dev/null +++ b/MicroPeakUSB/v1.0/MicroPeakUSB.jpg @@ -53,6 +53,10 @@ Altus Metrum products. is a rocket altimeter that is both precise and tiny, designed to be the ideal altimeter for model rocket contests. +* [MicroPeak USB Interface](MicroPeakUSB/) +provides an interface between [MicroPeak](MicroPeak/) and USB to +download flight log data. + # Projects # These are projects we're working on that may become products someday: @@ -68,10 +72,6 @@ is a higher-performance alternative to [TeleDongle](TeleDongle/). is a high-end flight computer with 6 pyro channels, more and better sensors, GPS, and a high performance bidirectional RF telemetry link. -* [MicroPeak Serial Interface](MPSerial/) -provides an interface between [MicroPeak](MicroPeak/) and USB to -download flight log data. - * [OpenAlt](OpenAlt/) was Bdale's original project here, a dual-deploy rocketry altimeter. One prototype was built, but never flown. 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