CPLD using VHDL

[blueroomelectronics]

sorry dint quite get wat u tried sayin......

If it's not code is there something wrong with your keyboard?

 

[Ayaskanta]

Well She's from India... so she put a bit of Hindi in between

 

[Mikebits]

I thought it was that annoying text speak.

 

[Anushapillai]

I thought it was that annoying text speak.

I am really sorry for using slang and hindi!!!! i know its really annoying! sorry!!

 

[forumlicker007]

Classmates? lol...

Anushapillai, Anagha_elex, Ayaskanta three are classmates ----------Mike and Blueroom how did you people survive over there, hehe? Very funny

 

[Ayaskanta]

Very funny!
I live in Bangalore and Anusha and Anagha live in Mumbai!
How on earth could we be classmates????????????

 

[forumlicker007]

Very funny!
I live in Bangalore and Anusha and Anagha live in Mumbai!
How on earth could we be classmates????????????

I don't know that. I thought you are classmates because I couldn't get what language you are speaking.

 

[Ayaskanta]

Haha! Thats alright. Well Anagha and Anusha were using Hindi. I was replying because I know the language
Sorry if I sounded rude

 

[Nivedita]

heyy anusha and anagha...u guys got any topic?

 

[Ayaskanta]

There we go! Another classmate?!

 

[forumlicker007]

heyy anusha and anagha...u guys got any topic?

.....grr this is too much. Nivedita, are you Ayaskanta's friend??

 

[Ayaskanta]

.....grr this is too much. Nivedita, are you Ayaskanta's friend??

???????? NO!!!!!!!
She's Anusha's and Anagha's friend!!!!!!!!!!!!!!!

Getting all confused?????

 

[Ayaskanta]

So you all done with your projects?

 

[forumlicker007]

I think they might be getting rigorous punishment in the classroom now. So no news..

 

[Sceadwian]

90% of them don't come back.

 

[Anagha_elex]

Sorryyyyyyyyyy for not being here these days.... Really had a hard time in college. M here wid an idea plz help me out.

 

[Anagha_elex]

I have to make a CPLD based VHDL project. So My idea is to make AUTOMATED CAR PARKING PROTOTYPE. I hav written the code as per the required algorithm. CAn ny1 chk it for me? i dont hav VHDL software on my PC or else i wud have chked it on my own. please help.

 

[Anagha_elex]

Entity ABCD is
Port (
CurrentStatus : IN BIT_VECTOR(0 to 3);
S1,GND,FIRST : IN BIT;
LEDOUT : OUT BIT_VECTOR(0to3)
);
End ABCD;
Architecture A of ABCD is
Begin
Process (S1)
Variable : SavedStatus_GND : BIT_vector(0to3);
Variable : SavedStatus_FIRST : BIT_vector(0to3);
Begin
If (GND’event and GND=’1’ ) then
LEDOUT<= SavedStatus_GND;
If (S1’event and S1=’0’ ) then
SavedStatus_GND := CurrentStatus;
End if;
End if;
Wait for 10 ns;
LEDOUT<=”0000”;
If (FIRST’event and FIRST=’1’ ) then
LEDOUT<= SavedStatus_FIRST;
If (S1’event and S1=’0’ ) then
SavedStatus_FIRSt := CurrentStatus;
End if;
End if;
Wait for 10 ns;
LEDOUT<=”0000”;
End process ;
End A ;

 

[Anagha_elex]

hey lemme explain how it shud work...

-new user wil make s1 on
- he will decide gnd floor or first floor wid the help of switch GND nd FIRST
- led status will correspond to saved positions
- on led corresponds to occupied place n off says place is empty
-user will take the car to empty place n will make corresponding status i/p HIGH
-also he will turn s1 off before leaving his car
-when d nxt user arrives he will follow d same procedure.

U think dis will work?

 

[Ayaskanta]

Everything seems ok, but then why is the output a 3 bit vector? Any particular reason? Cant it be a 1 bit output?
Why do you have to use variables when there are only if statements? The assignment doesn't create an error due to time-delay, you can as well assign LEDOUT<=current_status
Oh and use an if-else statement to chose between the two floors.

EDIT: See the VHDL Project thread.