[SOLVED] How To Delay 100ms From One Output To Other Output In Vhdl

[sanju_]

Hi.
I have four output ports (A,B,C,D).
i am sending serial data as output four outputs at a time.
now i want to send second serial data to same output ports after 100ms of first output...
is their anyway i can do using vhdl apart form WAIT statement...


thanks

 

[TrickyDicky]

the wait statement is only appropriate for simulation.

Otherwise stick the data into a memory and use a counter to wait for 100ms.

100ms is a very long time to wait, you may need a BIG buffer to cope with all the backed up data.

 

[sanju_]

yeah thanks thought of using counter it self...

didnt get what exactly "BIG buffer to cope with all the backed up data." means

 

[TrickyDicky]

You wont need it if there is no more data coming from the serial port.

 

[sanju_]

one more thing i am sending serial data of different type like i did serial shift as output next output is different
from first serial data that i need to delay it for 100ms

in between this two output how to assign counter
as i done shift register output as first output may be same output at second but delay need is 100 ms
any sample code or line for delay part??






IF (count2 = 2 AND temp = '1') THEN
count1 <= count1 + 1 ;
TEMP1 <= TEMP1(8 downto 0) & '1' ;
TEMP2 <= TEMP2(10 downto 0) & '1' ;
TEMP3 <= TEMP3(10 downto 0) & '1' ;
TEMP4 <= TEMP4(19 downto 0) & '1' ;
count2 <= 1 ;
END IF; --------------> shift register part



IF (count1 < 20) THEN
A <= TEMP4(20) ;
IF (count1 < 11) THEN
B <= TEMP2(11) ;
C <= TEMP3(11) ;
IF (count1 < 9) THEN
D <= TEMP1(9) ;
ELSe
D <= '1' ;
END IF;

ELSe
C <= '1' ;
B <= '1' ;
END IF;
end if ; -------------------> output part


output part repeats again how to introduce delay between them

 

[sanju_]

thanks TrickyDicky...
i used counter for delay and used "case" statements at the output side its working fine now.

 

[Emest]

thanks TrickyDicky...
i used counter for delay and used "case" statements at the output side its working fine now.

Hi,
may i know how have you done the delay and the case statement?
i am facing the same problem like u had before.
can u send me the coding?
Thanks for your big big help.
:wink: