Frequently Asked Questions
The Software for development is Xilinx Webpack ISE, which is a Free download from xilinx’s site: http://www.xilinx.com/products/design-tools/ise-design-suite/ise-webpack.htm
This will allow you to develop all of your own custom applications from scratch or by building on top of the existing LOGi-drivers/applications/etc that can be found on the LOGi-Repository.
We are working to making the application development process as painless as possible. So please feel free to send your thoughts and feedback on the process!
We have put together a Quick Start guide for the LOGi-Bone and the LOGi-Pi which has a section covering how to download, install and get started with the ISE tools.
The LOGi-EDU requires 4 PMOD expansion connector to fully support all of the EDU functionality. The LOGi-Bone has only 2 PMODs and the LOGi-Pi has 4 PMODs. The LOGi-Bone design differs from the LOGi-Pi in that there were extra pins needs to implement the GPMC parallel bus between the FPGA and the Beaglebone. For these reasons the LOGi-EDU is only compatible with the LOGI-Pi.Last updated:
The SATA connectors on the LOGi-Boards were not implemented to communicate with SATA devices, but to provide an easy to use, low cost LVDS expansion port. SATA interfaces are very widely used which make the cables and connectors very low cost and easily accessible.
We plan on taking advantage of using the high performance nature of the impedance controlled cables and connectors to easily extend the FPGA’s high speed LVDS signals to external custom designed LVDS expansion modules.
The Spartan 6 LX9 FPGA on the LOGi boards is specified to support up to 950 Mbps using the LVDS IO. The FPGA does not contain any hard IP in the fabric to interface with SATA devices.Last updated:
You can add different reward offerings to your existing pledge. Kickstarter does not allow for multiple reward items to be packaged into a single reward package. However, Kickstarter does allow you to increase your pledge value to any value you like. To add items to your existing pledge you can simply increase your pledge value by the increment of the extra items that you would like to add. We will send out after the kickstarter has ended and you can specify that you pledged an increased amount to cover the extra items. We will double check the pledge value and items and ship you the items that you asked for.
After the campaign ends we will send out a survey that will let you specify which combination of rewards you would like to receive that corresponds to the dollar amount of your pledge. Please email with any further questions.
Go to 'Manage Your Pledge' and add the dollar amount for any rewards you would like add on. For example, if you want to add an additional LOGi-Pi, you would add $89 to your pledge.Last updated:
The LOGi-Bone is fully compatible with the Beaglebone White. When used with the Beaglebone-Black, the LOGI-bone will require to disable the onboard eMMC (we will provide useful information for this in the documentation), due to GPMC lines being shared with the eMMC. In its current version the LOGI-bone device-tree files will also de-activate sound over HDMI on the beaglebone-black. This is just a software problem for now that we hope to address in the near future.Last updated:
The LOGi-Boards can be used without the Raspberry Pi or Beaglebone Host. We think it’s a lot funner to use the FPGA in conjunction with the screaming performance of the Host ARM processors, but the FPGA can work in solidarity if the user wishes. For a “lite” CPU/FPGA implementation the user can use Xilinx Microblaze 32 bit softcore within the FPGA.
The Pi/Bone headers may mechanically make a bit of a challenge to use the boards by themselves. If it is popular demand to use the boards in standalone mode, Valent F(x) will design a barebone base pcb that would act as a platform for the LOGi-Board to mount to in place of the Raspberry Pi or Beaglebone and would breakout all the signals that were routed to the host. Let us know if this is of interest!Last updated:
The LOGi-Boards have a 5 pin JTAG header available to interface with the FPGA. Digilent Inc. offers some low cost JTAG solutions that will work with the LOGi-Boards.Last updated:
Fortunately for all of us, we live in a world with many different flavors of electronics! In the FPGA realm we are moving toward high density, multi-functioning devices. There are some new FPGA/CPU chips on the market including the Altera’s SOC and Xilinx SOC chips. Some of these chips offer dual and Quad-Core ARM CPU’s!
The LOGi-Boards do not attest to compete in performance with the latest SOC chips, but we believe they are a heck of alot easier to use! The LOGi-Boards reveal themselves to the world in a humble, “Spartan 6 TQFP”, manner. We believe that they have a place in the world, right at the highly functional, easy to use, entry level point to using FPGA with ARM Co-Processing.
The current LOGi-Board offerings are our entry level offering with what we found to be the most cost effective/performance ratio entry into the market. With the success of the current offering we hope to begin addressing the Camaro, higher horsepower, offerings in the future, but think that it makes sense to start small and expand!
Thoughts to consider between the LOGi and an SOC:
* Unrivaled ARM/Linux Community Support with Raspberry Pi and Beaglebone
* A wide variety of libraries, applications, drivers already developed for the Raspberry Pi, Beaglebone hardware
* Plug it and Play - eliminate the error prone nature of creating your own custom connections from other FPGA boards to the bone or Pi or to external hardware peripherals
*LOGi pre-designed running applications - many more to come!
* LOGi easy to use, flexible wishbone API with python and C wrappers
* The comparable power consumption of the Spartan 6 is very low compared to most SOCsLast updated:
The LOGi-bone can be stacked with other Beaglebone shields. The LOGi-bone utilized GPMC, SPI and I2C ports of the beaglebone. It is the users responsibility to ensure that there are no conflicts with these peripherals in order for the LOGi-Bone to function properly.Last updated:
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