Abstract: The invention is directed to automatic hardware and firmware generation preferably for multi-function custom control development. In particular, the invention involves generating the schematic and the firmware together, such that they integrate together to provide functionality as described in a functional description of the desired control. A method of automatic hardware and firmware generation includes (i) providing a plurality of hardware schematics, each schematic having a unique identifier corresponding to a set of functions; (ii) providing a plurality of firmware modules, each firmware module including code for performing a function; (iii) generating a functional description that identifies a desired set of functions; and (iv) processing the configuration file and the plurality of firmware modules to generate executable firmware code that implements the desired set of functions and to select one of the hardware schematics that supports the desired set of functions.