iverilog
chisel
iverilog | chisel | |
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11 | 25 | |
2,677 | 3,750 | |
- | 2.0% | |
9.6 | 9.7 | |
17 days ago | 6 days ago | |
C++ | Scala | |
GNU General Public License v3.0 only | Apache License 2.0 |
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iverilog
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Which System Verilog Simulator to use if I need SVA Assertions?
Also, Icarus says that they do not support assertions in their full-generality either:
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Trying to learn and work with FPGAs
The toolchains come with their own simulators, but there are also open source ones you can use. For Verilog you have ICARUS Verilog and Verilator. For VHDL there is GHDL.
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Open-source SystemVerilog simulation support using cocotb
This is not, in general, true. While iverilog may support some SV features, it is far from complete and does not support some very common use cases. For example, interfaces.
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Order of assignments in verilog
However, I find that it's always read-before-write in Icarus Verilog. Is my tool wrong? Is the book wrong? Is this situation actually ambiguous?
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Ben's 8 Bit Computer in an FPGA
I have no intention to run it on real FPGA ever, Icarus Verilog simulator suits me well enough.
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Building the 8-bit computer in software
As the idea was to make it more realistic, I started by making (hopefully accurate representation of) 74-series logic chips in Verilog. Then wired them into higher level modules, and merged those into complete CPU. Runs quite good in Icarus Verilog.
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Where do I start with RISC-V/
I'd suggest starting with simulation using Icarus Verilog or Verilator. And gtkwave to display simulation output.
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100 Languages Speedrun: Episode 28: Verilog
We'll specifically be using Icarus Verilog.
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Transition from soc Design to Design Verification?
In the open-source world, learning UVM isn't practical. There just isn't a simulator that can run it. However, if you use something like PyUVM with CocoTB, along with verilator or Icarus as an RTL simulator you code start writing test benches around some simple verilog components.
- How much to buy these tools? I got this from openfpga website, thanks
chisel
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Calyx: Intermediate Language for Hardware Accelerators
My first instinct was to ask "Does this play well with CIRCT?" And thankfully they answer that right away in the README.
I'm personally of the opinion that there is a LOT of room for improvement in the hardware design tooling space, but a combination of market consolidation, huge pressure to meet deadlines, and an existing functional pipeline of Verilog/VHDL talent is preventing changes.
That's not to say "Verilog/VHDL are bad", because clearly they've been good enough to support nearly all of the wonderful designs powering today's devices. But it is to say, "the startup scene for hardware will continue to look anemic compared to the SaaS scene until someone gives me all of the niceties I have for building SaaS tools in software."
A huge amount of ideas (and entire designs) start off as software sims, which enables kernel/compiler engineers to start building out support for new hardware before it's manufactured.
There is some interesting work going on at SiFive building hardware with Chisel[1], as well as some interesting work lead by a professor at William and Mary to improve simulations[2].
1: https://www.chisel-lang.org
2: https://github.com/sarchlab/akita
- Chisel: A Modern Hardware Design Language
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I may be creating an abomination
Inspired by Scala. Which can do a whole lot more, and worse. The currently biggest competitor to decades old hardware description languages is a Scala DSL.
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An addressable little explored language gap: HDL - Hardware Description Languages, any language used for electronic circuit design, description, and specs
Already mentioned Chisel: https://www.chisel-lang.org/
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Trying to learn and work with FPGAs
I'm also a hobbyist. There are a number of alternative HDLs out there, and as hobbyists we can deviate more from the mainstream of (System)Verilog and VHDL if we desire, though you'll still need to be able to read them. In the past I've done Verilog, but lately I've been using SpinalHDL and have been really enjoying it. Its close relative Chisel also makes appearances in the RISC-V space.
- Alternate HDL language and Physical Design/EDA tools?
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Learning VDHL after knowing Verilog
What are your thoughts on other HDLs like Chisel or BlueSpec when it comes to better type checking?
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Learning Verilog and FPGA
I started playing with FPGAs and HDLs a couple years ago with no hardware design background (I'm mostly a software architect/engineer) and in the end found that a "higher-level" HDL suited me better.
I chose Chisel (https://www.chisel-lang.org/) an HDL based on Scala (technically a Scala DSL) which can provide many facilities to hardware generation.
I'd highly advise looking into it although also knowing Verilog helps a lot.
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If you keep clicking "Give 15 seconds" on Lichess, eventually it overflows to a negative number and you win
But some go further and ask "what if when we add a soldering station on top of it?"
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What universities have good PhD programmes in digital design?
In recent years Chisel HDL, RISC V, and SiFive came out of their architecture group, to name a few.
What are some alternatives?
logisim-evolution - Digital logic design tool and simulator
SpinalHDL - Scala based HDL
slang - SystemVerilog compiler and language services
myhdl - The MyHDL development repository
veridian - A SystemVerilog Language Server
amaranth - A modern hardware definition language and toolchain based on Python
verible - Verible is a suite of SystemVerilog developer tools, including a parser, style-linter, formatter and language server
cocotb - cocotb, a coroutine based cosimulation library for writing VHDL and Verilog testbenches in Python
pyuvm - The UVM written in Python
skywater-pdk - Open source process design kit for usage with SkyWater Technology Foundry's 130nm node.
Digital - A digital logic designer and circuit simulator.
bsc - Bluespec Compiler (BSC)