Array or Logic Vector?

[BlackOps]

Hello,

For example i want to declare a Red signal.. which is one of the RGB signals. Red signal will have 8 bits.. inside the code, i will assign different bits of this Red signal to the different signals... how is it better to declare the Red?

like this:

Red: IN STD_LOGIC_VECTOR (7 DOWNTO 0);
do i refer to different bits of this Red signal like.. Red(0) or Red[0] ???

or this:

TYPE Red IS ARRAY (7 DOWNTO 0) OF BIT;
do i refer to different bits of this Red signal like.. Red(0) or Red[0] ???

 

[Nikolai]

I think the former method is better and u can access individual bits using RED(7),RED(6),....RED(0).

Though the latter is also correct, u will have to include another line...

TYPE Red IS ARRAY (7 DOWNTO 0) OF BIT ; -- this will just create a datatype

SIGNAL RED_signal : Red ; -- this will create ur actual signal


PS : array elements too are accessed by '()' ie round parenthesis. No square brackets.