整个电路由单一饮料控制电路模块binctr.vhd和顶层电路模块refill.vhd组成；其中顶层电路模块中包含两种饮料控制电路，一种饮料为cola，另一种饮料为diet。其中每一种饮料的最大数量为3，当两种饮料的剩余数量均为0时使refill_bins置1。binctr.vhd控制电路以递减计数器为基础，并将该模块作为一个component包含在package中。-The entire circuit is controlled by a single beverage circuit the module binctr.vhd and the the top circuit module refill.vhd composition　wherein the top-level circuit module contains a control circuit of the two drinks, a beverage for the COLA another beverage for Diet. Wherein the maximum number of each kind of drink to 3, when the remaining quantity of the two beverages are 0 refill_bins set to 1. binctr.vhd control circuit to decrement the counter-based, and the module as a component included in the package.