treehugger
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(cross posting)
now this is a very basic question:
The code seen below goes to infinite loop during synthesis, hence my sythesis tool halts (with an error like, "loop has iterated 64 times so i am halting blah blah"). The reason behind this is that "data" is assigned to X (undefined-unknown) and the evaluation (i<data) yields X, and a while loop executes if its condition is X.
Isn't this an apparent problem? Am i missing some point? What is the workaround?
module example(data, trig)
input [4:0] data;
input trig;
output out;
reg out;
integer i;
always @ trig
begin
out=0;
i=0;
while(i<data)
begin
out=~out;
end
end
endmodule
I just need a loop which runs until it hits a variable number given by the user, not until a constant predefined value..
How to?
now this is a very basic question:
The code seen below goes to infinite loop during synthesis, hence my sythesis tool halts (with an error like, "loop has iterated 64 times so i am halting blah blah"). The reason behind this is that "data" is assigned to X (undefined-unknown) and the evaluation (i<data) yields X, and a while loop executes if its condition is X.
Isn't this an apparent problem? Am i missing some point? What is the workaround?
module example(data, trig)
input [4:0] data;
input trig;
output out;
reg out;
integer i;
always @ trig
begin
out=0;
i=0;
while(i<data)
begin
out=~out;
end
end
endmodule
I just need a loop which runs until it hits a variable number given by the user, not until a constant predefined value..
How to?