Assigning value to 7 bits output buffer?

Altera_Forum · ‎02-10-2017

Hi,

I'm doing a Moore FSM, and the outputs are 7 bits buffers (declared as such:

sum: out STD_LOGIC_VECTOR(6 down to 0);

)

When writing the output logic, I wrote:

when S2 => sum <= '0001010';

but that gives me an error for each of these instances. What would be the correct syntax for what I'm trying to do?

Thanks!

Altera_Forum · ‎02-10-2017

sum <= "0001010" WHEN S2 = '1';

Any number that uses more than 1 bit requires double quotes. If that is supposed to be a hex number (not clear but guessing it's binary), you would add an x (x"0001010").

Altera_Forum · ‎02-10-2017

--- Quote Start ---

you would add an x (x"0001010")

--- Quote End ---

Since 'sum' is a 7-bit value and x"0001010" represents a 28-bit value (which wouldn't work), stick with sstrel's first solution.

Cheers,

Alex

Altera_Forum · ‎02-10-2017

' is used for single characters

" is used for strings

You need to use "

Altera_Forum · ‎02-10-2017

Whoops, missed the 7-bit part! Yes, just "0001010".