Pattern inclusion

[Altera_Forum]

Hallo there, 

 I need some help or ideas, i have a data stream and one time in this stream i have a frame "80008000" the next frame is then a counter value, for example "00000008" and then again "normal" frames (for me not interesting how they look).  Now when i found this "80008000" i have to read out the next frame (counter value) and then i have to fill in the stream on this location with "80008000" frames. I have to fill in this frame as often as the counter value shows.  How can i do this? Should i take a fifo so that the frames which came after the counter value could be saved for the time i fill in the "80008000" frames?  has anybody an idea how i can do this?  thanks

[Altera_Forum]

yes, you either save the incoming frames while you are inserting... or use request signal to stop it...

[Altera_Forum]

thanks, 

 one more question, how can i read out the frame after the "80008000" frame? I can search for "80008000" and then i want to read out the frame after that, how can i realize this in vhdl?

[Altera_Forum]

you can use shift register to detect any pattern: 

 e.g. assuming data_in = 8 bits, for x"80008000" use 32 bit shift register:     on the clk edge: shift_reg <= shift_reg(23 downto 0) & data_in;  if(shift_reg = x"80008000")then  action...  end if;   take care with byte/shift orientaion(MSB isuses)

[Altera_Forum]

--- Quote Start ---  for what are you waiting?  --- Quote End ---    its a spam bot, you should give some negative reps and report the post as spam. :cool:

[Altera_Forum]

thanks a lot:D

[Altera_Forum]

sorry for my irrelevant post