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89 Threads found on Assign Statement
Have you cracked a book and seen what the CD4067 (or this 5V equivalent) is? It's not complicated, a 16:1 mux / demux, and you might simply do it as a case statement or a chain of 16 equivalence statements that assign the right input to the output.
I think the question is more about basic Verilog logic design... How do you use an always statement or what is an assign statement. How do you use those statements to make logic. // Code to describe an AND gate // using an always block always @(a, b) begin // you can code this with always @* begin instead. (...)
@dpaul Originially I used a conditional statement (assign DATA = (!direction) ? 16'bz : data_hold;) in my first try but it was very unstable. It would be working perfectly and I would change one small thing and it would stop working. I asked around and I was told this was common and that using the conditional operator for tristating is not r
Is this possible placing the if statement inside the genvar and for look because I want to check each element of an array zero or not ? And then assign specific function for the values if its zero or non-zero element? Because when I tried the above syntax its throwing an error "A is not a constant" ? Thanks genvar
By removing the reg from your definition of sclk, it defaults to a wire. Sclk must be a wire because you use the assign statement to assign sclk to sclk_sig. assign is only used for wires. r.b.
if(temp0 = ADC_Read(0),temp0>max_point0) This if statement in your code, stores 0 or 1 to temp0. No, it does not true in this case because the precedence (the priority) of the ',' (comma) operator is smaller than the precedence of the '=' (assign) operator. The whole 'if' works as th
Basically the way you do this is to edit your cds.lib file. Somewhere after the DEFINE statement for a library, put the line: assign DISPLAY where is the name you're going to
1) Set the following root attribute to TRUE attribute ==> remove_assigns 2) instruct RTL compiler which buffer to use , using the blow command set_remove_assign_options -buffer_or_inverter 3) run incremental optimization. synth -to_mapped -incr -- Shobhit
Your example defines two processes: the assign statement the initial block A continuous assign statement defines a process that waits for a change in any signal on the RHS. When a changes occurs, it evaluates the expression on the RHS and makes an assignment to the LHS. Then it goes back to waiting for ano
The generate statement is used along with for loop to instansiate an assign statements multiple times or to instansiate modules multiple times. But a for loop is capable of doing instansiation multiple times or to write assign statements multiple times with looping. So how does the generate (...)
A hint: reg ram_sel; and reg ram_sel ; are NOT the same.. The first is a packed array, while the second is an unpacked array. A packed array can be considered a group of signals, so you may assign a value to each of the bits with a single assign statement. That is not true for an un
module das (u,c,z); input u; input c; output z; genvar i; for (i=0;i<32;i=i+1) begin assign c=(u&c); end endmodule ERROR:HDLCompilers:26 - "dads.v" line 30 expecting 'endmodule', found 'for' how to solve it
all statement inside always block will executed on the event match , but if you do not provide always block , means execution will happen one time only , and all statement after that event will executed. I think @( ) .. is used for modeling purpose or in verification , but if you synthesize @ () , then tool will assign some constant (...)
Also note that you cannot use assign in an always block. When you use an assign statement, it is a continuous assignment and thus cannot be further defined by saying assign only on posedge clock. r.b.
How to send In 8051 sending one port value to other port ? P1 = P2; can i assign so ? And not working
Hi Is someone aware how to create an "if-then-else" type of conditional statement in HFSS? I wish to assign value to a Project or Design Variable based on a condition. More explicit, my requirement is as follows: We are aware of creation of project/design variables in HFSS. Say, I wish to create following project variables in HFSS: $Wt: Wi
Hi all, I want to know the operation of the below assign statement. assign carry = (ai+bi+di) >= 2; This assign statement is used to compute carry operation in full adder. How this statement gives the carry as output . pls explain me.... Thanks in advance ....
It's not possible in Verilog, several rules are violated. e.g. c undefined, multiple drivers for c, assign statement in always block
if a>b it assigns a to c,if not it assigns to b. is that all. is it same as "assign c=(a>b)? a:b;" can u please suggest a good book on verilog?
First, try not to use force. Use variable at the top level that connect to ports and procedurally assign those variables. There is no need to use a generate statement in your testbench because there is only one reset_n wire, assuming reset_n_i is a wire also.