- \n
- Creates a VHDL wrapper (.vhd)<\/li>\n
- Places IP in Design Checkpoint (.dcp) file<\/li>\n<\/ul>\n<\/li>\n
- Open my Vivado Block Design<\/li>\n
- Use or update the VHDL wrapper that uses the Design Checkpoint<\/li>\n
- Synthesis, Implementation, and Run<\/li>\n<\/ul>\n
The NI LabVIEW FPGA IP Export utility provides you with 2 files, a design checkpoint and a wrapper file to use for instantiating your IP using VHDL.<\/p>\n
A wrapper file is a very simple vhdl file, it contains the following interface to your design:<\/p>\n
\n\n
\n entity NiFpgaIPWrapper_fpga_top is
port (
reset : in std_logic;
enable_in : in std_logic;
enable_out : out std_logic;
enable_clr : in std_logic;
ctrlind_00_d : in std_logic_vector(0 downto 0);
ctrlind_01_d_latched : out std_logic_vector(0 downto 0);
ctrlind_02_c : in std_logic_vector(0 downto 0);
ctrlind_03_c_echo : out std_logic_vector(0 downto 0);
ctrlind_04_b : in std_logic_vector(0 downto 0);
ctrlind_05_a : in std_logic_vector(0 downto 0);
ctrlind_06_a_and_b : out std_logic_vector(0 downto 0);
ctrlind_07_a_or_b : out std_logic_vector(0 downto 0);
Clk40 : in std_logic
);
end NiFpgaIPWrapper_fpga_top;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\nHowever, in some situations using this method results in a problem, specifically Vivado will give a ‘Black Box Undefined error’ during the opt_design step of the Implementation phase.<\/p>\n
\n\n
\n “ERROR: [DRC INBB-3] ‘Black Box Instances: Cell ‘design_1_i\/…’ of type ‘design_1_i\/…’ has undefined contents and is considered a black box. The contents of this cell must be defined for opt_design to complete successfully.”<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n I have created a github.com repository where I have isolated this problem and make it very easy for someone to reproduce this error:<\/p>\n
https:\/\/github.com\/fpganow\/black.box<\/a><\/p>\n
But first, here is a screenshot of the error message: (left-clicking always opens in a new tab)<\/p>\n
![\"\"](\"http:\/\/fpganow.com\/wp-content\/uploads\/2021\/02\/08-More_Details-1.png\")
<\/a><\/p>\n\n\n\n