3/2/2023 0 Comments Flightgear raspberry pi![]() But with the first stable release, video acceleration works through Chromium and VLC, GPU acceleration works through Mesa, and hopefully, some of the performance regressions are resolved, so it can perform more or less as well, or in some cases better, than the 32-bit version. When I tested Raspberry Pi OS 64-bit on Raspberry Pi 4 in June 2020 I actually noted some performance regressions against Raspberry Pi 32-bit OS, and at the time there were some known issues such as the lack of hardware video decoding in VLC and Chromium. Some of the main reasons to finally release a 64-bit version include improved software compatibility with many closed-source applications only available for arm64, and some open-source ones not fully optimized for the armhf port, some performance benefits, and the ability for a process to make use of the full 8GB RAM, removing the 3GB limit when using LPAE (Large Physical Address Extension) on 32-bit operating systems. Top image: detail from Google Earth showing two aircraft and their flight paths.The Raspberry Pi Foundation has now officially released Raspberry Pi OS 64-bit about two years after the first beta version was released.ĭespite some potential performance benefits from using 64-bit code instead of 32-bit, the Raspberry Pi Foundation has resisted moving too quickly to a 64-bit OS because if it would create two separate worlds for their earlier 32-bit boards like Raspberry Pi 2 or Raspberry Pi Zero, and the newer 64-bit boards starting with Raspberry Pi 3 onwards and may confuse users besides the extra workloads. The gr-air-modes software serves as a compelling demonstration of the power of software-defined radio, and shows how it has become possible for custom hardware to be easily replaced by generic hardware costing a fraction of the price and by shifting complexity into the software domain. And gr-air-modes can also store reports in an SQLite database, and serve data over the network in either the SBS-1 format or as raw UDP packets. Integration with the FlightGear flight simulator is also possible, with live traffic being inserted into the simulator via its multiplayer interface. In Google Earth select Add → Network Link, browse to the modes.kml file and set refresh to 5 secondsįlight simulation and network applications The gr-air-modes application also provides Google Earth support and this can be configured with the following steps: With gr-air-modes set up the rtl_modes.py Python script can be run to provide a simple text output of decoded transmissions. This takes only a few minutes and involves cloning the source from GitHub, building and installing. configured all that's required is to set up the gr-air-modes application. The SDR is constructed using the GNU Radio framework and details of how to configure this and the DVB-T hardware used can be found in a previous post. But it's now possible to re-purpose DVB-T hardware costing around £20 to create an SDR-based receiver. Hobbyist equipment for receiving these transmissions has been available for some time and typically costs hundreds of pounds. Modern aircraft are fitted with “Mode S” transponders that can be interrogated by air traffic control radar in order to ascertain their position and heading. In this post we look at how USB DVB-T hardware can be used with software-defined radio (SDR) to create a low cost aviation Mode S receiver. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |