By Douglas L. Perry, Harry Foster
Formal verification is a robust new electronic layout technique. during this state of the art instructional, of the field's most sensible recognized authors workforce as much as exhibit designers tips on how to successfully follow Formal Verification, besides description languages like Verilog and VHDL, to extra successfully remedy real-world layout difficulties.
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Any signal value in the design can be examined at any time, whereas in the real hardware system only the external pins of the chip can be examined. With the real hardware system it can be very difficult to capture the pin values at the correct time. With a simulation model any signal or pin can be examined at any time during the simulation. The simulation model allows the designer full control over the signal values in the design. At any time the designer can change the value of an internal signal.
This causes extra delay in the connections between FPGA processors. Both of CHAPTER 3 26 these issues cause the accelerator to be much slower than it could potentially be. 2 Testbench The accelerator still suffers from the same testbench issue as the HDL software simulator. The hardware accelerator does not run fast enough to connect to the real hardware environment in which the final product will exist. Therefore the hardware accelerator will need to be driven by a testbench. Most accelerators only accept synthesizable HDL.
This can work for some designs but not for others. When it does work, it allows the designer to see how his or her design will behave in the real world. Emulators have full visibility into the design so that the designer can examine any signal at any time. This is very important during debugging. The Bad News Emulators are complex pieces of machinery requiring huge investments in hardware. They are extremely expensive as they use many of the largest and most expensive FPGA devices per board, and many boards per system.
Applied Formal Verification by Douglas L. Perry, Harry Foster