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Altera_Forum
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13 years ago

STD_LOGIC_VECTOR multipication

I keep getting an error using the '*' to multiply SLV's: use IEEE.numeric.std.all; constant COEFF : STD_LOGIC_VECTOR (5 downto 0) := x"3F"; signal EXPx63_LTCHD : S...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

[pedant]Its not a variable, with use of the <= assignment I see its a signal - there is a difference between the two [/pedant]

try:

DUTY <= ((WIDTH_LTCHD*PERCENT)/PERIOD_LTCHD)(5 downto 0);

otherwise just use a temporary 23 bit signal and slice that:

temp <= (WIDTH_LTCHD*PERCENT)/PERIOD_LTCHD;

DATA <= temp(5 downto 0);