VLSI
- 최초 등록일
- 2012.02.14
- 최종 저작일
- 2010.05
- 10페이지/ MS 워드
- 가격 1,000원
소개글
verilog elevator design process
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◈ Description
We changed our design from ‘Traffic Signal Controller’ to ‘Elevator’, because ‘traffic signal controller’ is somewhat trite and simple. This elevator is designed for six floors buildings; there are 10 buttons outside of the elevator to call the elevator, and 6 buttons inside of the elevator to choose destination floors. For the outside buttons, there is only one button on the lowest and highest floors; upward button for the lowest floor (first floor), and downward button for the highest floor (sixth floor), named U1 (Up 1) and D6 (Down 6), respectively. For the other floors, the second, third, fourth and fifth, there are two buttons on each floor to move in both ways, up and down, and those buttons are named U2, U3, U4 and U5 for upward direction, and D2, D3, D4 and D5 for downward direction, respectively. Inside of the elevator, there are six buttons named F1, F2, F3, F4, F5 and F6 (F means Floor). Thus, the total number of the inputs in the design is sixteen. On the other hand, there are two outputs for the design; PF and M. PF means present floor of the elevator. M means movement, and it indicates the moving status of the elevator; 01 for upward, 02 for downward, and 00 for stop. The default state of this design is the first floor. For example, if someone pushes ‘D3’ button outside of the elevator on the 3rd floor, the elevator starts to go up to 3rd floor from its default state, the first floor. Furthermore, in this case, the status of M changes from 00 to 01 to 00, while PF changes from 1 to 2 to 3.
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