+++ /dev/null
-[[!meta title="MegaDongle"]]
-# MegaDongle
-
-This is an RF interface designed primarily for use as a ground station
-interacting with Altus Metrum altimeters on board high power model
-rockets. Think of it as a USB to RF interface. The RF filter components
-are set for use in the vicinity of 435 Mhz.
-
-MegaDongle is intended to supplement and perhaps eventually replace
-[TeleDongle](../TeleDongle) with a product that provides on the order of
-6dB better transmit and receive RF performance, at a modest increase in
-manufacturing cost.
-
-For the latest MegaDongle firmware and related software, please
-visit the [AltOS](../AltOS) page on this site.
-
-These are photos of the current MegaDongle prototypes:
-
-<a href="v0.2/megadongle-top.jpg"> <img src="v0.2/megadongle-top-thumb.jpg"></a>
-<a href="v0.2/megadongle-bottom.jpg"> <img src="v0.2/megadongle-bottom-thumb.jpg"></a>
-
-## Features ##
-
-### User View ###
-
-* 70cm ham-band transceiver for interaction with Altus Metrum flight computers
- like [TeleMetrum](../TeleMetrum/)
-* programmed for 38k4 GFSK data rate with forward error correction
-* USB interface for power, configuration, and data interface
-* 4 pin Tyco MicroMaTch connector for debug and flash programming
-* 8 pin Tyco MicroMaTch connector supports serial or SPI interface
-* 1.1 x 1.1 inch 4-layer board, fits inexpensive Hammond 1551 plastic enclosure
-
-### Developer View ###
-
-* Hardware Features
- * ST Micros [STM32L151](http://www.st.com/internet/mcu/product/248821.jsp) ARM Cortex M3 based Microcontroller
- * TI [CC1125](http://www.ti.com/product/cc1125) Ultra-High Performance RF Narrowband Transceiver
- * 150mA 3.3V LDO regulator
- * takes input from USB interface by default
- * output appears on 8-pin companion connector
- * can take input from 8-pin companion connector in non-USB applications
-* Software Features
- * Written mostly in C with some ARM assembler
- * Runs from on-chip flash, uses on-chip RAM
- * USB serial emulation for data interface
-* 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)
- * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
-
-## [Production History](../production) ##
-
-## Artifacts ##
-
-There is a single manual for most Altus Metrum products including MegaDongle,
-which is available in [html](../AltOS/doc/altusmetrum.html) and
-[pdf](../AltOS/doc/altusmetrum.pdf) formats.
-
-The hardware design current gEDA files are available from
-[git.gag.com](http://git.gag.com) in the project
-[hw/megadongle](http://git.gag.com/?p=hw/megadongle;a=summary).
-
-The firmware can be found on the [AltOS](../AltOS) page on this site.
-
-## Future Plans ##
-
-Our version 0.1 design was abandoned after we discovered the need for more
-processing power to implement in software the same FEC approach provided
-by the CC1111 we used in [TeleDongle](../TeleDongle).
-
-Three units of version 0.2 prototypes were assembled and worked just
-fine, but it was unclear that the performance was actually better than
-TeleDongle with our modulation and coding scheme. We may or may not work
-on this design more in the future.
projects / web / altusmetrum / commitdiff
