What is generate blocks in Verilog?
A generate block allows to multiply module instances or perform conditional instantiation of any module. It provides the ability for the design to be built based on Verilog parameters. Generated instantiations can have either modules, continuous assignments, always or initial blocks and user defined primitives.
How does generate work in Verilog?
Verilog generate constructs are powerful ways to create configurable RTL that can have different behaviours depending on parameterization. Generate loop allows code to be instantiated multiple times, controlled by an index. Conditional generate, if-generate and case-generate, can conditionally instantiate code.
Is generate block synthesizable in Verilog?
Yes. It is possible. A generate statement is just a code generator directive to the synthesizer.
Why do we use generate statement in Verilog?
We use the generate statement in verilog to either conditionally or iteratively generate blocks of code in our design. This allows us to selectively include or exclude blocks of code or to create multiple instances of a given code block.
What is a Genvar in Verilog?
A genvar is a variable used in generate-for loop. It differs from other Verilog variables in that it can be assigned values and changed during compilation and elaboration time. The genvar must be declared within the module where it is used, but it can be declared either inside or outside of the generate loop.
What is Loop generate?
In general, the main difference between generate for loop and regular for loop is that the generate for loop is generating an instance for each iteration. Meaning that in your example there will be 3 always blocks (as opposed to 1 block in the regular loop case).
Can we use for loop inside always block?
It seems that the for loop isn’t allowed inside a always block (The n doesn’t seems to reset).
Is for loop synthesizable in Verilog?
for loop is a synthesizable construct in verilog. However for loops should only be used in combinational always blocks.
What is the use of Genvar in Verilog?
A genvar is a variable used in generate-for loop. It stores positive integer values. It differs from other Verilog variables in that it can be assigned values and changed during compilation and elaboration time.