Operation • Elevator initial state: • Floor 1, Door Closed, Motor Off (UP-DOWN=0) Elevator remains on last floor visited: • Floor 1 or 2 or 3, Door Closed, Motor Off • On Elevator Call (N1, N2, N3), either ● If current Floor!=n: Motor UP or DOWN until FSn, Door Open (10s), Reset N • Else: Door Open (10s), Reset N ● If Elevator going up to Floor 3 and at Floor 2: • Get N1 then go up to Floor 3 before down to Floor 1 Elevator cannot move unless Door Closed/nDesign the Elevator Control Circuit Pin/Bus 1/0 Size Input 1-bit Input 1-bit Input 1-bit Input 1-bit Input 1-bit Input 1-bit Input 1-bit Output 1-bit N1 N2 N3 FS1 FS2 FS3 DC R1 R2 R3 UP Output 1-bit DOWN Output 1-bit DO Output 1-bit FLOOR Output 7-bits CLOCK Input 1-bit Floor 1 Call (1=call to floor 1) Floor 2 Call (1=call to floor 2) Floor 3 Call (1=call to floor 3) Floor 1 Sensor (1=at floor 1) Floor 2 Sensor (1=at floor 2) Floor 3 Sensor (1=at floor 3) Door is closed (1=closed) Reset Floor 1 Call when arrive at Floor 1 after call (1=reset) Reset Floor 2 Call when arrive at Floor 2 after call (1=reset) Reset Floor 2 Call when arrive at Floor 2 after call (1=reset) Motor Up (1=on) Motor Down (1=on) Open door (1=open) 7-Segment display of current floor Manual Clock (falling-edge) RESET Input 1-bit Manual Reset (0=reset) Name Output 1-bit Output 1-bit DE1 SW9 SW8 SW7 SWO SW1 SW2 SW3 LED9 LED8 LED7 LEDO LED1 LED2 HEXO PBO PB1 Comment/nProject Description • Design a Moore sequential state machine • Minimize the number of states Show the state graph and state tables (state transition, output) • Create a VHDL implementation and simulate in Modelsim Upload to DE1 board and demonstrate operation ● ● Comment • Extra Credit: Display 'u' and 'd' on 7-segment Hex1 to indicate UP or DOWN • Add a FIRE input that clears all calls and returns elevator to Floor 1 with Door Open ●

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