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In 1968 Shirley Chisholm became the first Black woman elected to the United States Congress. In 1972 she launched a campaign for the Democratic presidential nomination, breaking another political barrier.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
| Verilog to Routing | |
|---|---|
| Developer | The VTR development team |
| Stable release | 9.0.0
/ 20 January 2025 |
| Written in | C/C++ |
| Operating system | Unix-like |
| Type | Electronic design automation |
| License | MIT License |
| Website | verilogtorouting |
| Repository | |
Verilog-to-Routing (VTR) is an open source CAD flow for FPGA devices.[1][2][3] VTR's main purpose is to map a given circuit described in Verilog, a hardware description language, on a given FPGA architecture for research and development purposes; the FPGA architecture targeted could be a novel architecture that a researcher wishes to explore, or it could be an existing commercial FPGA whose architecture has been captured in the VTR input format. The VTR project has many contributors, with lead collaborating universities being the University of Toronto, the University of New Brunswick, and the University of California, Berkeley. Additional contributors include Google, The University of Utah, Princeton University, Altera, Intel, Texas Instruments, and MIT Lincoln Lab.
The VTR design flow usually consists of three main component applications: ODIN II which compiles Verilog code to a circuit in Berkeley Logic Interchange Format (BLIF), a human-readable graph representation of the circuit;[4] ABC which optimizes the BLIF circuit produced by ODIN II; and VPR which packs, places and routes the optimized circuit on the given FPGA architecture. There are some additional optional tools that can process the VTR output further. For example, the FASM FPGA assembly tool can produce programming bitstreams for some commercial FPGAs (Xilinx Artix and Lattice ice40) at the end of the VTR flow, while the OpenFPGA tool integrates with VTR to produce a standard cell layout of a novel (proposed) FPGA. It is also possible to use different tools for the first (HDL synthesis) stage of the VTR flow; for example the Titan flow[5] uses Quartus to perform the HDL to logic synthesis stage, and then VPR to perform placement and routing, while Symbiflow uses the Yosys synthesis tool followed by VPR placement and routing.
ODIN II is the HDL compiler of the VTR flow. It transforms a given Verilog code to a BLIF circuit, performs code and circuit optimizations, visualizes circuits,[6] and performs partial mapping of logic to available hard blocks of the given architecture. Also, it can simulate the execution of circuits both for validation as well as power, performance and heat analysis. ODIN II is maintained by the University of New Brunswick.[7]
From the Verilog to Routing website, it is noted: "Odin-II has been deprecated and will be removed in a future version. Now VTR uses Parmys as the default frontend which utilizes Yosys as elaborator with partial mapping features enabled."[8]
ABC optimizes BLIF circuits by performing logic optimization and technology mapping. ABC is maintained by the University of California, Berkeley.[9]
Versatile Place and Route (VPR) is the final component of VTR. Its input is a BLIF circuit, which it packs, places and routes on an input FPGA architecture.
During packing, neighboring and related logic elements of the circuit are clustered together into logic blocks matching the hardware of the FPGA. During placement, these logic blocks as well as hard blocks are assigned to the available hardware resources of the FPGA. Finally, during routing the signal connections between blocks are made. VPR is primarily developed by the University of Toronto, with contributions from many other universities and companies.[10]
The FPGA Assembly (genfasm) tool will produce a programming bitstream from a VTR implementation (placement and routing of a circuit) on commercial architectures for which complete VTR architecture files describing the FPGA device have been produced. Currently this includes the Xilinx Artix and Lattice ice40 FPGA families. This tool is primarily developed by Google.
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
Verilog-to-Routing (VTR) is an open source CAD flow for FPGA devices. VTR's main purpose is to map a given circuit described in Verilog, a hardware description language, on a given FPGA architecture for research and development purposes; the FPGA architecture targeted could be a novel architecture that a researcher wishes to explore, or it could be an existing commercial FPGA whose architecture has been captured in the VTR input format. The VTR project has many contributors, with lead collaborating universities being the University of Toronto, the University of New Brunswick, and the University of California, Berkeley. Additional contributors include Google, The University of Utah, Princeton University, Altera, Intel, Texas Instruments, and MIT Lincoln Lab.
VTR often refers to a video tape recorder. VTR may also refer to: VTR (telecom company) VTR Bio-Tech, a Chinese biotechnology company Vermont Railway, a reporting mark Verilog-to-Routing, an open-source CAD-tool for FPGAs Versatile Test Reactor, a sodium cooled fast reactor View-through rate, in online advertising
VPR usually refers to Vermont Public Radio, a radio network in the US state of Vermont. VPR or Vpr may also refer to: Video plankton recorder, an underwater device for recording plankton Visual place recognition, an application of computer vision Vpr, a human immunodeficiency virus gene and protein product Vanguarda Popular Revolucionária, a Brazilian guerilla organization later merged into the Vanguarda Armada Revolucionária Palmares Versatile Place and Route, a component of Verilog-to-Routing in computer-aided design Vanderpump Rules, an American reality television series
The Electric VLSI Design System is an EDA tool written in the early 1980s by Steven M. Rubin. Electric is used to construct logic wire schematics and to perform analysis of integrated circuit layout. It can also handle hardware description languages such as VHDL and Verilog. The system has many analysis and synthesis tools, including design rule checking, simulation, routing, Layout vs. Schematic, logical effort, and more. Electric is written in Java, and was released as part of the GNU project in 1998 under the GNU General Public License. In 2017, Electric development ceased, but support and bug fixes continue.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Madam C.J. Walker
