1 2. 3. 4. 5. 7. 8. 9. 10. 14. Specifications There are five Floors of...

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1 2. 3. 4. 5. 7. 8. 9. 10. 14. Specifications There are five Floors of equal height. There is no ground floor. Floors are numbered as 1, 2, 3, 4 and 5. Elevator moves in two directions: UP and DOWN. The direction has to be shown with the help of two LEDs: "UP" and "DOWN" LEDs. It is supposed that this indicator (the two LEDS UP and DOWN) is replicated inside the elevator car (or cabin) and also on each floor. However, you may only implement it once in your design. 17. A "Current Floor" display panel (implemented with a seven-segment display) shows the current location of the elevator cabin on each floor and inside the elevator cabin. This display panel may also be implemented only once in your design. Each floor has an input panel "FloorXpanel" (X is the number of the floor) for people waiting outside the elevator. There are two buttons "UP" & "Down" on each of these panels to request the elevator to stop. If the elevator is moving upwards and it is yet to reach a certain floor, then in the event that a person waiting outside on that particular floor presses the UP Button on the FloorXpanel, the elevator will be stopped on that floor. The operation will be the same when the elevator is moving downwards and DOWN Button is pressed. Whenever the elevator stops at a floor, it opens up the door for 20 secs. An LED indicates the Open/Closed state of the door. If the door is closed, the LED should be lit up constantly and if the door is open then the LED should blink with a perceptible delay (say 500 ms) If the elevator is moving upwards and it has already passed a particular floor, say floor 2, and a person outside on floor 2 presses the UP button on Floorpanel, then the elevator will not reverse its direction and it will continue its movement upwards to cater to other requests. However, the request of the person on floor 2 will be logged and it will be entertained in the next upward trip. Similar operation will be carried out in case of downward movement. If a requested floor (from CabinPanel) is yet to be reached in the current direction of elevator, the request will be entertained once, and the elevator will stop at that requested floor when it arrives. If a floor is requested after it has passed, then the request will be logged and will be entertained on the reverse trip if specification 9 is not encountered. In the event that specification 9 is encountered, that floor will have to be requested again. 11. The emergency STOP button on the CabinPanel stops the elevator on the next floor in a given direction. The requests are not cleared by pressing this button. 12. The requests logged from outside the elevator are not cleared in any event. These are entertained according to the specifications 5 and 7. 13. The elevator does not move to and stop at a floor that has not been requested from inside or outside. For example, if it is moving upwards to reach a previously requested floor, say floor 4, then it will move to floor 4, stop there and stay there until a new floor is requested from inside or outside. Inside the elevator, the passengers use a panel called "CabinPanel" with request buttons for each floor 51, 52, 53, 54, 55 & an emergency STOP button. This panel also has an LED associated with each button to indicate the requested floor. If a button is pressed, its respective LED is lit up until the requested floor has been reached. A passenger may press one or more of these buttons to stop the elevator at the respective floor(s). Each button operates such that the request is logged at one keypress, and it is deleted on double keypress (the second keypress of the double keypress should be inside of a 500 milliseconds time slot). All floor requests entered from CabinPanel inside the elevator are cleared if and only if floor 1 is "reached". The passengers will have to press the buttons on CabinPanel again. Note that once floor 1 has been reached and all old requests have been cleared, then new requests entered from CabinPanel will be allowed to be logged in while the elevator is staying at floor 1. The speed of elevator's motor control is a function of the distance to the nearest requested floor from current location, if the elevator is at first floor and the nearest floor requested is 5, the elevator's motor runs at 100% duty cycle. If elevator is at first floor and the nearest floor requested is 4, the elevator's motor runs at 75% duty cycle. For initial position at first floor and 3 floor as nearest request, speed is 50% duty cycle. For initial position at first floor and 2nd floor as nearest request, the speed is 25% duty cycle. The operation will be same for a different current location, Le. the speed will be determined only by how far the elevator cabin is from its next destination (nearest requested floor). 15. The elevator always starts at a SLOW speed of 10% duty cycle and reaches to its maximum speed (according to the specification 14) after 2 seconds. 16. An optical sensor "DS", located on the elevator car (cabin), lets the elevator know that it is "about to reach the NEXT floor. If the elevator needs to stop at the upcoming floor (that has been detected by the DS), it first reduces its speed to SLOW (10% duty cycle) and then turns off the motor after 2 seconds. In Proteus, use a button to simulate this sensor. If the elevator has stopped at a certain floor, say floor 3, then its door may be opened in two ways: UP/DOWN button on Floor 3panel is pressed from outside, or $3 is pressed on CabinPanel inside. Door will work according to specification 6 FloorXpanel: UP & DN Buttons are on each floor. DN VA DN UP VA ON UP A ON UP UP Elevator Control ON UP Legend Laser Emitters for Level Sensor UP/Down Buttons S5 S4 S3 S2 S1 STOP CabinPanel Level Sensor Door Up Down * Elevator Status G D B Current Floor (PCINT14/RESET) PC6 (PCINTIGRXD) PD (PCINT17/TXD) PDI 3 (PCINT18/INTO) PD2| (PCINT19/0C2B/INTI) PD3 (PCINT20/XCK/TO) PD4 VCC GND (PCINT6/XTALI/TOSCI) PB6 9 (PCINT7/XTAL2/TOSC2) PB7 10 11 (PCINT21/OCOB/T1) PDS | (PCINT22/OCOA/AINO) PD6 12 (PCINT23/AINI) PD7 13 (PCINTO CLKO/ICPI) PBO 14 24 16 Part-1 - Individual Due - 8th Jun 2020 30 Marks • Block Diagram (10 Marks) . • Submit a neat diagram showing the micro-controller and all the LEDs/Buttons. Porteous Layout to be also provided. [4 Marks] • All the pins should be labelled. [4] • Description (12 Marks) • Which interrupts will you be using and for what purpose? [3] • How will you implement the Current Floor display? (Specification 3) [3] • How will you implement the functionality of Specification 9? [3] • How will you implement the functionality of Specification 14? [3] 1 2. 3. 4. 5. 7. 8. 9. 10. 14. Specifications There are five Floors of equal height. There is no ground floor. Floors are numbered as 1, 2, 3, 4 and 5. Elevator moves in two directions: UP and DOWN. The direction has to be shown with the help of two LEDs: "UP" and "DOWN" LEDs. It is supposed that this indicator (the two LEDS UP and DOWN) is replicated inside the elevator car (or cabin) and also on each floor. However, you may only implement it once in your design. 17. A "Current Floor" display panel (implemented with a seven-segment display) shows the current location of the elevator cabin on each floor and inside the elevator cabin. This display panel may also be implemented only once in your design. Each floor has an input panel "FloorXpanel" (X is the number of the floor) for people waiting outside the elevator. There are two buttons "UP" & "Down" on each of these panels to request the elevator to stop. If the elevator is moving upwards and it is yet to reach a certain floor, then in the event that a person waiting outside on that particular floor presses the UP Button on the FloorXpanel, the elevator will be stopped on that floor. The operation will be the same when the elevator is moving downwards and DOWN Button is pressed. Whenever the elevator stops at a floor, it opens up the door for 20 secs. An LED indicates the Open/Closed state of the door. If the door is closed, the LED should be lit up constantly and if the door is open then the LED should blink with a perceptible delay (say 500 ms) If the elevator is moving upwards and it has already passed a particular floor, say floor 2, and a person outside on floor 2 presses the UP button on Floorpanel, then the elevator will not reverse its direction and it will continue its movement upwards to cater to other requests. However, the request of the person on floor 2 will be logged and it will be entertained in the next upward trip. Similar operation will be carried out in case of downward movement. If a requested floor (from CabinPanel) is yet to be reached in the current direction of elevator, the request will be entertained once, and the elevator will stop at that requested floor when it arrives. If a floor is requested after it has passed, then the request will be logged and will be entertained on the reverse trip if specification 9 is not encountered. In the event that specification 9 is encountered, that floor will have to be requested again. 11. The emergency STOP button on the CabinPanel stops the elevator on the next floor in a given direction. The requests are not cleared by pressing this button. 12. The requests logged from outside the elevator are not cleared in any event. These are entertained according to the specifications 5 and 7. 13. The elevator does not move to and stop at a floor that has not been requested from inside or outside. For example, if it is moving upwards to reach a previously requested floor, say floor 4, then it will move to floor 4, stop there and stay there until a new floor is requested from inside or outside. Inside the elevator, the passengers use a panel called "CabinPanel" with request buttons for each floor 51, 52, 53, 54, 55 & an emergency STOP button. This panel also has an LED associated with each button to indicate the requested floor. If a button is pressed, its respective LED is lit up until the requested floor has been reached. A passenger may press one or more of these buttons to stop the elevator at the respective floor(s). Each button operates such that the request is logged at one keypress, and it is deleted on double keypress (the second keypress of the double keypress should be inside of a 500 milliseconds time slot). All floor requests entered from CabinPanel inside the elevator are cleared if and only if floor 1 is "reached". The passengers will have to press the buttons on CabinPanel again. Note that once floor 1 has been reached and all old requests have been cleared, then new requests entered from CabinPanel will be allowed to be logged in while the elevator is staying at floor 1. The speed of elevator's motor control is a function of the distance to the nearest requested floor from current location, if the elevator is at first floor and the nearest floor requested is 5, the elevator's motor runs at 100% duty cycle. If elevator is at first floor and the nearest floor requested is 4, the elevator's motor runs at 75% duty cycle. For initial position at first floor and 3 floor as nearest request, speed is 50% duty cycle. For initial position at first floor and 2nd floor as nearest request, the speed is 25% duty cycle. The operation will be same for a different current location, Le. the speed will be determined only by how far the elevator cabin is from its next destination (nearest requested floor). 15. The elevator always starts at a SLOW speed of 10% duty cycle and reaches to its maximum speed (according to the specification 14) after 2 seconds. 16. An optical sensor "DS", located on the elevator car (cabin), lets the elevator know that it is "about to reach the NEXT floor. If the elevator needs to stop at the upcoming floor (that has been detected by the DS), it first reduces its speed to SLOW (10% duty cycle) and then turns off the motor after 2 seconds. In Proteus, use a button to simulate this sensor. If the elevator has stopped at a certain floor, say floor 3, then its door may be opened in two ways: UP/DOWN button on Floor 3panel is pressed from outside, or $3 is pressed on CabinPanel inside. Door will work according to specification 6 FloorXpanel: UP & DN Buttons are on each floor. DN VA DN UP VA ON UP A ON UP UP Elevator Control ON UP Legend Laser Emitters for Level Sensor UP/Down Buttons S5 S4 S3 S2 S1 STOP CabinPanel Level Sensor Door Up Down * Elevator Status G D B Current Floor (PCINT14/RESET) PC6 (PCINTIGRXD) PD (PCINT17/TXD) PDI 3 (PCINT18/INTO) PD2| (PCINT19/0C2B/INTI) PD3 (PCINT20/XCK/TO) PD4 VCC GND (PCINT6/XTALI/TOSCI) PB6 9 (PCINT7/XTAL2/TOSC2) PB7 10 11 (PCINT21/OCOB/T1) PDS | (PCINT22/OCOA/AINO) PD6 12 (PCINT23/AINI) PD7 13 (PCINTO CLKO/ICPI) PBO 14 24 16 Part-1 - Individual Due - 8th Jun 2020 30 Marks • Block Diagram (10 Marks) . • Submit a neat diagram showing the micro-controller and all the LEDs/Buttons. Porteous Layout to be also provided. [4 Marks] • All the pins should be labelled. [4] • Description (12 Marks) • Which interrupts will you be using and for what purpose? [3] • How will you implement the Current Floor display? (Specification 3) [3] • How will you implement the functionality of Specification 9? [3] • How will you implement the functionality of Specification 14? [3]

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