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# <a name="Launch Vehicle No. 2 Avionics Sy"></a> Launch Vehicle No. 2 Avionics System

### <a name="LV2 Avionics System Hardware"></a> LV2 Avionics System Hardware

- [[FlightComputer]]: An x86 running Linux 2.4.18, the FC is the core of the avionics system.
  - Because of a [[grant|news/2005-01-05]] we received, we're re-opening the flight computer search: [[LvTwoFlightComputerSearch]]

- CAN nodes: The avionics system uses the Controller Area Network (CAN) bus, a 1 Mbps serial multi-master bus, to communicate between the FC and the various nodes. Roughly, each sensor and actuator gets it's own CAN node:
  - [[Generic PIC/SPS front end|CanNodes]]: the generic PIC, SPS, CAN and ICD2 front end for all nodes
  - [[Amateur TV System|LvTwoAmateurTelevisionOverview]]: Broadcasts NTSC video with overlay at 1.25 GHz.
  - [[Avionics Power System|AvionicsPowerSystemLv2]]: power switches, battery and bus monitoring
  - [[GPS|GlobalPositioningSystem]]: 12 Channel GPS receiver
  - [[Inertial Measurement Unit: inertial sensors (also pressure and temperature sensors)|InertialMeasurementUnit]]
  - [[Magnetometer|MagnetometerLv2]]: 3D sensing of the Earth's magnetic field
  - [[Recovery Node|RecoveryNodeLV2]]: Battery backed up 2m radio receiver and pyrotechnic actuators
- [[CAN Bus Links|CanBusLinks]]

- [[Avionics Module|AvionicsModuleLv2]]: the hardware that holds everything together

### <a name="Launch Tower"></a> [[Launch Tower|Lv2LaunchTowerElectronics]]

- [[Launch Tower Computer (LTC)|Lv2LaunchTowerComputer]]: A Linux-based x86 PC104 stack with Lucent Orinoco 802.11b card and CAN.
- [[24dBi 2.4GHz 802.11b parabolic dish antenna|CommunicationsTeamHome]] ("BBQ" grill antenna).
- [[Launch Tower Relay (LTR) board|Lv2LaunchTowerRelay]]: PIC18F458-based CAN node with four relays and some analog sampling.
- [[RocketReady Relay (RRR) board|Lv2RocketReadyRelay]]: PIC18F458-based board which provides rocketready relay interlock in firing chain.
- [[Launch Igniter Circuit|Lv2LaunchTowerIgniter]]: igniter circuit for launch igniter.
- [[Umbilical cord|Lv2UmbilicalCord]]: Connects LV2 to the electronics box. Provides shore power, includes rocketready relay interlock.
- [[Launch Tower Power System|Lv2LaunchTowerPower]]:Solar array, charge controller, and battery

### <a name="Other:"></a> Other:

- [[Log of the hard-to-find parts|AvionicsPartsLv2]] of the avionics system.

## <a name="Firmware"></a> Firmware

- [[PicCore]]: An open source application framework in C for the Microchip PIC18Fxxx
  - [[CanFirmwareConventions]]

- LV2 CAN Node Firmware:
  - GPS Node Firmware: [[CanNodeFirmwareGps]]
  - IMU Node Firmware: [[CanNodeFirmwareImu]]
  - ATV Node Firmware: [[CanNodeFirmwareAtv]]
  - PYRO Node Firmware: [[CanNodeFirmwarePyro]]
  - PWR Node Firmware: [[CanNodeFirmwarePwr]]

## <a name="The CAN Bus"></a> The CAN Bus

- [[CanBusIDs]] list the data packets for the LV2 CAN bus.<br />
- [[CanBusUtilization]] lists the current bandwidth usage of the CAN bus.<br />
- [[CanDeviceBusTimings]] for the Philips SJA1000 &amp; Intel 82527 protocol chips.<br />
- [[CanDatasheets]] for datasheets, specifications and app notes.<br />
- [[CanBusLinks]] for the Controller Area Network Bus.<br />

## <a name="Avionics Hardware/Software Tools"></a> Avionics Hardware/Software Tools

- [[RocketNames]]: Project wide naming conventions for systems, schematics, etc.
- [[GerberTools]]
- [[AvionicsSVNAccess]]: getting access to the Avionics software itself
- [[SjaCanTestNode]]: PIC16F877/SJA1000 based CAN node for testing the FC/LTC
- [[CANtalope|PsasCantalopePage]] CAN protocol monitor.
- [[EagleCad]]: Cadsoft's EAGLE schematic capture/PCB CAD program
- [[LPKF 91 router information|LpkfRouter]]

## <a name="Meeting Notes"></a> Meeting Notes

<table border=1 cellpadding=0 cellspacing=0>
  <tr>
    <td> Date </td>
    <td> Comments </td>
  </tr>
  <tr>
    <td>[[news/2005-08-18]]</td>
    <td> Packing up over four years worth of work: Avionics System is ready to go! </td>
  </tr>
  <tr>
    <td>[[news/2004-06-09-avionics]]</td>
    <td> APS (Avionics Power System) design: Li Ion battery charger choice </td>
  </tr>
  <tr>
    <td>[[news/2004-05-30]]</td>
    <td> Critical path scheduling and APS </td>
  </tr>
</table>

<table border=1 cellpadding=0 cellspacing=0>
  <tr>
    <td> Date </td>
    <td> Comments </td>
  </tr>
  <tr>
    <td>[[news/2003-12-30]]</td>
    <td> Magnetometers. </td>
  </tr>
  <tr>
    <td>[[news/2003-10-13]]</td>
    <td> Power measurements on each component of the avionics system. </td>
  </tr>
  <tr>
    <td>[[news/2003-10-07]]</td>
    <td> What&#39;s next, timelines, task lists </td>
  </tr>
  <tr>
    <td>[[news/2003-08-26]]</td>
    <td> To do list, what&#39;s critical </td>
  </tr>
  <tr>
    <td>[[news/2003-07-22]]</td>
    <td> Non-PDX tasks, Protocols, LTC, Rocketview API, Routers </td>
  </tr>
  <tr>
    <td>[[news/2003-06-24]]</td>
    <td> Things to do by August 22nd; Try #6 on Flight Computer State Machine </td>
  </tr>
  <tr>
    <td>[[news/2003-06-10]]</td>
    <td> CPA propagation tests at xerox; APS lives! </td>
  </tr>
  <tr>
    <td>[[news/2003-03-11]]</td>
    <td> Recovery node design review. Files attached. </td>
  </tr>
  <tr>
    <td>[[news/2003-01-28]]</td>
    <td> Workshop on EAGLE PCB CAD tool. </td>
  </tr>
  <tr>
    <td>[[news/2003-01-07]]</td>
    <td> 5/4/2003 is freeze and launch call. 1/26 kickoff meeting scheduled. </td>
  </tr>
</table>

<table border=1 cellpadding=0 cellspacing=0>
  <tr>
    <td> Date </td>
    <td> Comments </td>
  </tr>
  <tr>
    <td>[[news/2002-11-17]]</td>
    <td> James brain dumps FC infrastructure. FC network setup info. First hack at the whole PSAS 802.11b network architecture. </td>
  </tr>
  <tr>
    <td>[[news/2002-10-01]]</td>
    <td> Lecture on the Linux kernel. Beer. Make CAN nodes more hardware like. Create a software team. </td>
  </tr>
  <tr>
    <td>[[news/2002-09-22]]</td>
    <th bgcolor="#99CCCC"><strong> Launch of LV2! </strong></th>
  </tr>
  <tr>
    <td>[[news/2002-09-19]]</td>
    <td> Tuning 1.3GHz and 2.4GHz helical antennas @ the PSU microwave lab. </td>
  </tr>
  <tr>
    <td>[[news/2002-09-10]]</td>
    <td> Hardware work @ Andrew&#39;s. Software @ FAB CS lounge: telemetry client works. </td>
  </tr>
  <tr>
    <td>[[news/2002-09-08]]</td>
    <td> ATV distro board and [[PicCore]] @ Andrew&#39;s. Software @ FAB CS lounge. </td>
  </tr>
  <tr>
    <td>[[news/2002-08-27]]</td>
    <td> GPS CAN node done. Clementine determined to be broken. </td>
  </tr>
  <tr>
    <td>[[news/2002-08-25]]</td>
    <td> ATV hardware &amp;amp; distro board designed. Jupiter boards programmed. Ate pizza. </td>
  </tr>
  <tr>
    <td>[[news/2002-08-20]]</td>
    <td>[[PicCore]] lecture. James starts hacking FC software together. </td>
  </tr>
  <tr>
    <td>[[news/2002-08-18]]</td>
    <td> Larry goes it alone working on 2m radio interface. </td>
  </tr>
  <tr>
    <td>[[news/2002-08-13]]</td>
    <td> Overview of what needs to be done. James&#39; notes on FC update. </td>
  </tr>
  <tr>
    <td>[[news/2002-08-11]]</td>
    <td> Paul and Andrew discuss GPS node processing. </td>
  </tr>
  <tr>
    <td>[[news/2002-08-06]]</td>
    <td> ATV and FC node work. </td>
  </tr>
  <tr>
    <td>[[news/2002-07-21]]</td>
    <td> More [[AvionicsToDoList]]. Got LV1b 2m receiver to work, and tested it. </td>
  </tr>
  <tr>
    <td>[[news/2002-07-07]]</td>
    <td> Getting CAN nodes working w/[[PicCore]]. </td>
  </tr>
  <tr>
    <td>[[news/2002-06-25]]</td>
    <td> Paul and Nate&#39;s CAN node dev system finally up and running. </td>
  </tr>
  <tr>
    <td>[[news/2002-06-18]]</td>
    <td> Project timeline until the schedule 8/3 launch. </td>
  </tr>
  <tr>
    <td>[[news/2002-05-28]]</td>
    <td> James hacks away on FC, Andrew on the beginnings of [[PicCore]]. </td>
  </tr>
  <tr>
    <td>[[news/2002-05-26]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-05-21]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-05-14]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-05-10]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-05-07]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-04-28]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-04-14]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-04-10]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-04-07]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2002-03-10]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2002-03-03]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2002-02-27]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2002-02-06]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2002-01-23]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2002-01-09]]</td>
    <td>
    </td>
  </tr>
</table>

<table border=1 cellpadding=0 cellspacing=0>
  <tr>
    <td> Date </td>
    <td> Comments </td>
  </tr>
  <tr>
    <td>[[news/2001-12-16]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2001-12-11]]</td>
    <td> Twiki lesson, planning for next launch. </td>
  </tr>
  <tr>
    <td>[[news/2001-12-04]]</td>
    <td> OGI Lecture: Intro to Extreme Programming (XP) </td>
  </tr>
  <tr>
    <td>[[news/2001-11-13]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2001-09-25]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2001-09-20]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2001-09-15]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2001-09-12]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2001-10-09]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2001-09-04]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2001-08-29]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2001-08-22]]</td>
    <td> Flight computer (MOPS520) boots off floppy! </td>
  </tr>
  <tr>
    <td>[[news/2001-08-21]]</td>
    <td>
    </td>
  </tr>
  <tr>
    <td>[[news/2001-08-15]]</td>
    <td>
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    <td>[[news/2001-08-07]]</td>
    <td>
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    <td>[[news/2001-08-02]]</td>
    <td>
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    <td>[[news/2001-07-25]]</td>
    <td>
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    <td>[[news/2001-07-17]]</td>
    <td>
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  </tr>
  <tr>
    <td>[[news/2001-06-27]]</td>
    <td> Meeting with Jim Binkly of PSU CS on 802.11b. </td>
  </tr>
</table>