How to stop a process by running one time

[xilinx1001]

Hi,

I wrote a code for triggering the ultrasonic SRF05 sensor

The trigger should be given for 10usec and give a delay of 50msec before next trigger

The process is running with the clock and is running continuously.

code:

process(check_bit,clk)   
begin	


  if(clk'event and clk = '1') then 
  if (check_bit = X"74") then  


   if(count2 <= "000000000001001011000"  ) then
	
    trg2 <= '1';
	   count2 <=count2+"0000000000000000000001" ;
   else	
    trg2 <= '0';
	
	 count2 <=count2+"0000000000000000000001" ;
	 
	 if (count2 ="1001100010010110100000") then
	 
	 count2<="0000000000000000000000";	 
	 		
	end if;
	end if;
  end if;
end if;
 end process;

How to stop it from triggering continuously

I need to trigger it for only once


Thanks in advance
xilinx1001

 

[Golden Electronics]

after first trigger off 50 ms duration use infinite loop such as while(1); which stop ur process till reset

 

[chuckey]

Use a thing thing like variable = 1 then.... set variable to 1 at start of prog. After the pulse set variable to 0. Or for testing read a key, while key = 1 then...
Frank