See Also

The Block Editor allows you to enter and edit graphic design information, in the form of schematic diagrams and block diagrams. The Quartus^® II Block Editor reads and edits Quartus II Block Design Files (.bdf) and MAX+PLUS^® II Graphic Design Files (.gdf). You can open a GDF in the Quartus II software, but you cannot create a new GDF.

The Block Editor incorporates the design logic represented by each block diagram, schematic, or symbol into the project, and each BDF can contain blocks and symbols that represent logic in the design. You can create new design files from blocks in a Block Editor file, update the design files when you modify the blocks and the symbols, and generate Symbol Editor files from Block Editor files. In addition, you can analyze the Block Editor file for errors.

The Block Editor provides blocks, which are useful in top-down design. Although a symbol in the Symbol Editor already refers to a design entity, blocks in the Block Editor are unspecified, and you can use blocks to create the design from the top.

The Symbol Editor allows you to view and edit symbols that represent macrofunctions, megafunctions, primitives, or design files. Each Symbol Editor file represents one symbol. For each symbol file, you can choose from libraries containing LPM megafunctions and LPM functions. You can customize these Symbol Editor files, then add the symbols to schematics created with the Block Editor. The Symbol Editor reads and edits Quartus II Block Symbol Files (.bsf) and MAX+PLUS II Symbol Files (.sym), which are saved as BSFs. You can open an SYM in the Quartus II software, but you cannot create a new SYM.

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