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Normal part selects in Verilog require constants. So attempting the above with something like dword[i+7:i] is not allowed. So if you want to select a particular byte using a variable select, you can use the indexed part select.
Some data types in Verilog, such as reg, are 4-state. This means that each bit can be one of 4 values: 0,1,x,z. This means that each bit can be one of 4 values: 0,1,x,z. With the "case equality" operator, === , x's are compared, and the result is 1.
Jun 26, 2013 · This isn't quite correct. In Verilog, a vector (or any other) object is 'true' if it is non-zero, and it is known - in other words, it does not contain x/z metavalues. So, it's not 'tested for equality to 0'. @VL: try not to combine Verilog and SV questions - they're different languages. You wouldn't ask a C question in a C++ group, or vice-versa.
Feb 16, 2016 · <= is a nonblocking assignment. It is used to describe sequential logic, like in your code example. Refer to IEEE Std 1800-2012, section 10.4.2 "Nonblocking procedural assignments".
Aug 22, 2018 · "<=" in Verilog is called non-blocking assignment which brings a whole lot of difference than "=" which is called as blocking assignment because of scheduling events in any vendor based simulators. It is Recommended to use non-blocking assignment for sequential logic and blocking assignment for combinational logic, only then it infers correct hardware logic during synthesis.
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Jul 17, 2013 · i have a verilog code in which there is a line as follows: parameter ADDR_WIDTH = 8 ; parameter RAM_DEPTH = 1 << ADDR_WIDTH; here what will be stored in RAM_DEPTH and what does the << operator do here.
Sep 9, 2012 · I'm trying to translate a Verilog program into VHDL and have stumbled across a statement where a question mark (?) operator is used in the Verilog program. The following is the Verilog code; 1 m...
Apr 11, 2013 · I'm trying to learn Verilog but in the example I'm studying the [NumberOfBits-1:0] command is used and I can't quite figure out why it's there and what it's doing. Here's my code: module verilogmo...
Oct 5, 2016 · What does the caret sign (^) mean in the Verilog hdl language? In a formula in verilog with inputs a and b and output c, what would c = a ^ b mean?
