This utility has been developed for those who wants to convert an existing verilog design into VHDL. The generated VHDL may not work as is and may require minor manual correction in order to ensure the VHDL data type matching. This has been developed in Java( 1.6.x ) in order to make it platform independent and bundled as an executable JAR file.
source setup_env.('csh' or 'sh' or 'bat' as applicable )
verilog2vhdl -in simple_and.v -top simple_and_top -out simple_and.vhd
java com.eu.miscedautils.verilog2vhdl.verilog2vhdl -in simple_and.v -top simple_and -out output.vhd
You can provide multple verilog files even with wildcard like *.v throught the -filelist switch. You can use the -sort switch to tell the tool to sort the files before processing them, this -sort switch is mandatory if your input files are in random order. Also, you can exclude files with the -excludefilelist switch which also supports wildcards.
There are other switches like -only_entity to create just the entity correspomding to the specified top. Similarly, there is -only_component to create a component declaration corresponding to the specified module.
This output VHDL file is dependent on the following two files which are part of this tool's tar ball-
This is how you can compile and simulate the generated VHDL the modelsim simulator-
vmap misc misc
vmap vl2vh_work vl2vh_work
vcom -work misc $EDAUTILS_ROOT/vhdl_pkgs/src/misc/misc.vhd
vcom -work misc
vcom -work vl2vh_work simple_and.vhd
vsim -c -lib vl2vh_work simple_and_top
Get details by executing it as 'verilog2vhdl -help'
Send your feedback to email@example.com for further improvement of this tool.
1) This tools assumes that the parameters are of INTEGER type and not of type string. It blindly defines those as integer and initializes the same by converting the verilog values into INTEGER. It may require manual intervention to rectify this.
2) The expressions type in the 'IF' condition, '=' and '/=' operator, assignment will require intervention since VHDL is strongly typed.
3) Some verilog predefined primitivies are not supported, e.g. transif0, transif1, trans .
4) System Verilog is not supported. Only limited construct in Verilog-2K is supported