Fourth lab day 21-02-2014

This is our fourth lab day. After almost one month effort, we gradually made some achievements though there   were several problems during the project.
Here is several draft diagrams that we made in the last 3 weeks.

figure 1: original overall block diagram

Figure 1 is our original block diagram. However, it needs some improvements (pointed out by our supervisor).

 figure 2 :  improved block diagram

           

    figure 3 : use case diagram

Here is the work that each member done during the fourth lab day.
Ye Zhu
I drew the updated block diagram with the help of Xiaotian Zhang. Also, I started to simulate the VHDL code for coin receiver. The simulation is successful, but we can only input the coin during one clock period. We could not apply this to real vending machine. Therefore, I need to do some modification to the code in order to satisfy the requirements.

Yuhao Gu
This is the rest of my keypad, the code is almost finished, and the control and the subtracter, the control part is to select the items and to show the price, the subtracter is used to subtract the price from the insert coins. This is the block digram.