Software to Hardware High-Level Synthesis Tool for FPGAs

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Site with a wide offering of projects and information about FPGAs.

Synthesis takes your design (HDL or schematic) and creates a flat netlist out of it.


Experience has shown that complex multi-FPGA prototyping requires careful integration of advanced synthesis and intelligent partitioning, as summarized in the figure below.

Field-programmable gate array - Wikipedia

Furthermore, some incremental synthesis flows require user intervention to predict the location of a potential change. This is not always practical since it is difficult to anticipate the location of a bug. More effective is an automatic incremental synthesis that can detect design changes and incrementally synthesis them without user-intervention.

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VHDL Synthesis and Optimization for FPGA/ASIC | …

While the figure below demonstrates a simple gated clock, it is worth noting that not all gated clocks are created equal. Gated clocking schemes can be extensive, resulting in multi-level logic that drives not just simple registers but memory and DSP blocks. Clock divider circuitry, such as simple counters, is another example where a clocks is taken off the clock-line and may result in severe skew. A synthesis flow should be able to handle these structures.

The only Arria II FPGA supported is the EP2AGX45 device

Clock gating, while necessary in the ASIC world to conserve power in portable devices, can lead to poor results in FPGAs. Hence, conversion of these gated clocks to their FPGA functional equivalents is recommended. Most clock nets in an FPGA should be mapped to high-speed, low-skew clock lines. Nets directly driving sequential elements are typically routed this way, but when clocks are gated, they are taken off these high-speed routes. The resulting implementation leads to poor performance and potential setup and hold-time violations. FPGA synthesis should be able to convert these gated clocks to functionally equivalent logic, such as using the enable pin available on most sequential elements.

An FPGA IP core for easy DMA over PCIe with ..

One of the more critical performance optimizations in today’s complex designs is physical synthesis—the ability to use physical characteristics of the target FPGA to improve frequency. While regular RTL synthesis only takes into account logic cell delays and simple timing models of interconnect delays, physical synthesis takes into account where the actual logic may be placed on the device and advanced delay models of routing resources. With this information it produce a netlist optimized for performance. This is particularly useful for high-end devices, which are typically used in ASIC prototyping. And because high-end FPGAs are available from different vendors, extensive device support of physical synthesis is critical in order to keep options open when finding the most suitable FPGA for prototyping.

Architectural Synthesis of Fixed-Point DSP Datapaths …

It is important to get a feel—sooner rather than later—for the minimum number of required FPGAs and interconnect structure. This gives an idea of the task that lays ahead. Automated or semi-automated partitioning software can be of immense help in this exploratory phase. By using such software, it can be as straightforward as importing all Verilog, VHDL, SystemVerilog, and post-synthesis design files, or a combination of any, and letting the tool perform an accurate gate-level estimate using encapsulated, bottom-up synthesis. Older generation RTL partitioning software limited itself to rough area estimates through pure RTL analysis, thereby ignoring gate-level details. Next-generation tools have moved beyond this by performing full up-front synthesis to extract accurate timing and area data. The integration and certification between the partitioning software and synthesis tool is critical at this stage.

FPGA Design | Logic Synthesis - Scribd

Performance is typically important for all FPGA projects, and ASIC Prototyping is no exception. More often than not, the prototype is not expected to run at actual ASIC speeds but fast enough either to handle real-time input, communicate with an external interface, or at least provide a verification environment several times faster than simulation. In such cases synthesis needs all the usual optimization capabilities, such as advanced technology inference, retiming, resource sharing, and easy control of resource allocation.