Control Output Voltage on USB Cable Programmatically

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Controlling the output voltage on a USB cable programmatically is a complex task due to the standard 5V output and the limitations of USB specifications. The discussion highlights the desire to adjust the voltage output dynamically or toggle it at specific frequencies. Programming USB devices typically requires knowledge of USB protocols and possibly specialized hardware. Resources such as the provided USB programming manual may assist in understanding the necessary steps. Achieving this functionality may involve using specific USB controllers or microcontrollers capable of voltage regulation.
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I'm looking for a way to control the output voltage on a USB cable through programming. I don't know too much about how to program USB devices, but I know there's a default 5v output, a ground, and two data lines in every USB cable. Ideally, I would like to be able to set this voltage output to anything, or make it switch on/off with a given frequency.

Any help is appreciated!
 
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Here is a http://www.delcom-eng.com/downloads/USBPRGMNL.pdf" . Maybe this will help.
 
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