Description
You can use Synopsys FPGA Express to instantiate the LPM function directly into your hardware description language (HDL) code.
Below is an example of an
LPM_MULT instantiation in VHDL:
LIBRARY ieee;
USE ieee.std_logic_1164.all;
LIBRARY lpm;
USE lpm.lpm_components.all;
ENTITY mult_supported IS
PORT(
a, b : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
my_out : OUT STD_LOGIC_VECTOR(15 DOWNTO 0)
);
END mult_supported;
ARCHITECTURE lpm OF mult_supported IS
BEGIN
u1 : lpm_mult
GENERIC MAP(
lpm_widtha => 8,
lpm_widthb => 8,
lpm_widthp => 16,
lpm_widths => 8,
lpm_representation => unsigned
)
PORT MAP(
dataa => a,
datab => b,
result => my_out
);
END lpm;
This example illustrates both the instantiation of the LPM function and the passing of its parameters.
Check the FPGA Express on-line help to ensure that the LPM function you want to use is currently supported by the software.