FPGA programming is the process of preparing and creating software programs that work with specific hardware circuits. It is a hardware-programmable technology that uses the combination of logic gates and memory blocks to undertake computing tasks. The primary objective of the process is to develop a circuit that can produce a specific output when powered on.
Implementing an FPGA solution requires a lot planning to ensure that all features are in place and work properly. A requirement document that contains all specifications and details will help reduce the risk of problems in the implementation process. It is also a good idea to simulate the design at various stages of development using tools like Mentor Graphics Questa and Cadence Vivado together with Simulink.
Two programming languages have historically accounted for most of the work in FPGA programming, VHDL and Verilog. VHDL is similar to C and has a syntax more suitable for writing programs. Verilog is more V-like and some find it easier use.
Typically, FPGA designs are implemented as a block, also known as a logic block or logic cell. It is a logic block that has standard functions like multiplication, addition and subtraction along with basic error-checking, such as the negation and sign of an integer. It also includes lookup tables (LUTs) which contain predefined lists of logic outputs for any combination of inputs.