VHDL- Behaviour & Dataflow

[danesh]

Hi Guys,

How can i differenciate between dataflow and behaviour code language jus by looking at the codes?
if no obvious information is provided.

thanks guys

 

[Mkanimozhi]

Hi,
In VHDL 4 styles of coding is there

1.Dataflow
2.Behavioural
3.Strutural
4.Mixed Design

Dataflow-Which willbe created by using simple logic gates like and,or,nand etc..........the statement which is inside the architecture of this type are concurrent statement.

architecture arch_and_gate of and_gate is
begin
c<= a and b;
end architecture;

Behavioural-The architecture which contains the process block inside the architecture and all behavioural model,and statement which contains ar sequential statements.It will use if-else ,while, case, inside the process block

architecture arch_dff of dff is
begin
process(rst,clk,d)
begin
if(rst='0') then
q<='0';
elsif(clk='1' and clk'event) then
q<=d;
end if;
end process;
end architecture;

I think now u clearly understand

Regards
Kanimozhi.M

 

[venkatesankalidass]

hi ,
in Behaviour level, process keyword is present

in dataflow level , concurrent statement (<=) is present

and if both are present it is mixed level model

 

[parinda]

bit difficulty to distinguish
but in behavioral method codes like

with input select output__signal =>
"out_put 1" when "input 1"
"out_put 2" when "input 2"
"out_put 3" when "input 3"
.....
......
........

will use without concerning the logical relation ship between input and output