Collaborate Disseminate
We’ve been fans of the Yosys / Nextpnr open-source FPGA toolchain for a long while now, and like [Michael] we had no idea that their oss-cad-suite installer sets up everything …read more Continue reading Did You Know YoSys Knows VHDL Too?
Custom semiconductor chips are generally big projects made by big companies with big budgets. Thanks to Tiny Tapeout, students, hobbyists, or anyone else can quickly get their designs onto an …read more Continue reading Tiny Tapeout 3: Get Your Own Chip Design to a Fab
[Vuong Nguyen] clearly knows his way around artificial intelligence accelerator hardware, creating ztachip: an open source implementation of an accelerator platform for AI and traditional image processing workloads. Ztachip (pronounced …read more Continue reading Ztachip Accelerates Tensorflow and Image Workloads
VHDL and Verilog are hardware description languages, used to describe and define logic circuits. They’re typically used to design ASICs and to program FPGAs, essentially using software to define hardware. …read more Continue reading Using VHDL To Generate Discrete Logic PCB Designs
Most projects that interface with the real world need some sort of input device. Obviously this article is being written from a standardized “human interface device” but when the computers …read more Continue reading Capacitive Touch Controller for FPGAs
While ARM continues to make inroads into the personal computing market against traditional chip makers like Intel and AMD, it’s not a perfect architecture and does have some disadvantages. While …read more Continue reading Custom RISC-V Processor Built in VHDL
Gauntlet is a well-known arcade game from 1985 with many sequels and ports to more modern architectures such as Xbox and GameCube. Thanks to its popularity and relative age, the original arcade cabinet is well documented with the schematics available online. It was regarded as the most complex and ambitious …read more
Over on GitHub, [ttsiodras] wanted to learn VHDL. So he started with an algorithm to do Mandelbrot sets and moved it to an FPGA. Because of the speed, he was able to accomplish real-time zooming. You can see a video of the results, below.
The FPGA board is a ZestSC1 that has a relatively old Xilinx Spartan 3 chip onboard. Still, it is plenty powerful enough for a task like this.
The project doesn’t directly drive a display. It does the math, stores the results in the board’s onboard RAM and then sends a frame to the PC using the …read more
If you want to use FPGAs, you’ll almost always use an HDL like Verilog or VHDL. These are layers of abstraction just like using, say, a C compiler is to machine language or assembly code. There are other challenges to the throne such as SpinalHDL which have small but enthusiastic followings. [Tom] has a post about how the VexRISC-V CPU leverages SpinalHDL to make an extremely flexible system that is as efficient as plain Verilog. He says the example really shows off why you should be using SpinaHDL.
Like a conventional programming language, it is easy to find niche languages …read more
FPGAs are great fun, but sometimes you need a few starter projects under your belt. These projects might be something you could just as well do with a CPU, but you have to start somewhere. [LambdaPI] recently shared a 4-bit calculator created using an FPGA, and you can see it in the video below.
The calculator uses a Papilio FPGA board and a LogicStart accessory board for the display and switches. The Papilio normally uses schematic-based entry and Arduino code, but [LambdaPI] used VHDL. You enter the two 4-bit numbers on the 8 switches and then the joystick selects one …read more