VHDL problem

[Altera_Forum]

Hi everyone,  

I'm a new user of FPGA. I have 2 LEDs and a clock of 32KHz. So I wanna light up LED1  then light off LED 1 and light up LED2. Im trying to do something in VHDL, but it seems it's nonsense what I've done    LIBRARY ieee; USE ieee.std_logic_1164.all; use ieee.numeric_std.all; use IEEE.STD_LOGIC_SIGNED; use IEEE.STD_LOGIC_UNSIGNED; use IEEE.STD_LOGIC_ARITH.ALL;   ENTITY TP4LED IS PORT ( clock : IN std_logic; s1: OUT std_logic; s2: OUT std_logic ); END TP4LED;   ARCHITECTURE behavior OF TP4LED IS -- fonctionnement d'une bascule D   signal count : integer(10 downto 0); BEGIN   PROCESS (clock) -- liste de sensibilité   BEGIN  count <= '0'; s1<='1'; s2<='0'; if(clock'event and clock='1')then  count <= count + 1; if (count = '9') then s1<='0'; s2<='1'; count<=0;  end if; end if; END PROCESS; END behavior;  In addition, I have this mistake that I don't know how to resolve it  Error (10380): VHDL error at TP4LED.vhd(24): integer type is used but not declared as an array type    I know it might be an easy question. Could anyone help me please thank you very much Bo

[Altera_Forum]

integer is not an array type, so you cannot use it like and array. Your count signal declaration says you want 11 integers. If you wanted a single integer with 11 bits, you should use the unsigned type (before you do this - delete the non-standard std_logic_unsigned/signed and std_logic_arith libraries from your library list - otherwise you're going to get all sorts of conflicts). 

 You need:  signal count : unsigned(10 downto 0);  secondly, '9' is a character, not an integer value. change it to  if count = 9 then...  Finally, do not do assignments outside of the clocked part of the process.