I've been playing around with Kicad lately. I stumbled upon it for the first time playing around in Ubuntu (KDE) some months ago, running on a BeagleBoard XM of all things! Since then I've loaded the Windows version as well and it works exactly the…
FPGA Just Might WIN!
Working hard on implementing the Input Capture-Multiplexer.
I'm working with Xilinx Webpack 12.1 and I have a little help with Atium Designer as well :)
It's starting to look like the CPLD won't have the resources I need in a sized package or price I'm looking for.
There are some good options in the Spartan family in the $6 to $12 range that I'm exploring.
I have 3 Xilinx development platform's I'm… Continue
The 9500 series Xilinx CPLD is memory mapped into external address space using the atXmega's external bus interface. The CPLD provides a linear address mapping of all 14 Servo Channel Captures. Alternatively, the CPLD will detect frame ends and signal an interrupt to transfer all 14 Captures via DMA to an assigned data memory location within the atxmega. 14 PWM outputs will be sent to the CPLD from the atxmega. Failsafe routing of servo input… Continue
Kixrazor is a pretty cool Electronic Flight Information System as called by Natalius Kiedro its creator. Very nice write up is available at http://www.mcselec.com/index.php?option=com_content&task=view&id=269. The hardware uses a GPS feeding into a Sparkfun 9DOF "Razor" board whose output is used by the AR7212 autopilot which finally sends telemetry (NEMA and AHRS) out to a 433Mhz Modem… Continue
Reference Available Below: An efficient orientation fillter for inertial and inertial/magnetic sensor arrays (Sebastian O.H. Madgwick)
Various algorithms of varying complexity and computational requirements are available to determine the orientation of an object using 9DOF sensors. The Kalman filter was considered and not selected due to issues of simulation, complexity, computational load, and lack of knowledge and experience to take advantage of numerically well… Continue
The MTK3329's arrived and they are amazingly small. The picture shows an Atmel Xplain development board next to a DIYDrones Ardupilot. Below from left to right, is the amazingly small Gmm-U1, the FGPMMOPA6B with integral LNA and 16mm tuned patch antenna followed by a Sarantel helical SL1203A passive antenna. I have an old Rockwell Jupiter GPS module that… Continue
The recently updated ATxmega128A1 development board, JM-XD200-USB
, by Justin Mattair at http://xmega.mattair.net/ is a very nice atxmega platform. He has thoughtfully included an onboard ATmega32U2 as a PDI programmer, LUFA style (ala… Continue