A traffic control system needs to be designed to control the lights in Fig. 1. Two sensors are E and L. When E=1, there is a vehicle toward the east direction; when L = 1, there is a vehicle to turn from South to West (left turn). The lights are shown in Fig. 1: East green (EG), East yellow (EY). East red (ER), and Right-turn-only Green (RG); North green (NG), North yellow (NY). North red (NR), and Left-turn-Green (LG); and South green (SG), South yellow (SY), South red (SR). Initially, East green, North red and South red lights are on and others off. After m = 20 Sec., East green is off and East Yellow-will be on for a short period d = 10 Sec.. East Red is on while East yellow- is off. Meanwhile, if L = 0, both North and South green lights turn on until M = 60 Sec. elapses and there is a vehicle from West (or E = 1); and if L = 1, South Red remains on. But Left-turn green. North green, and East right-turn-only Green lights turn on until L = 0. Next, Left-turn green and Right-turn-only Green lights turn off (no yellow lights between two stages) while North green remains on and South green light turns on until M = 60 Sec. elapses and there is a vehicle from West (or E = 1). After that, both North and South yellow- light will be on for d = 10 Sec. before they turn into red. Then it returns to the initial status, i.e., East green, North red and South red lights are on and others off. A T-intersection with notation: N-North, E-East, S-South, LG-Left-turn green, RG-Right-turn-only Green, G-Green. Y-Yellow and R-Red A timer can be started when S is high and signals d, m and M will be generated to supply to the controller when the corresponding time 10, 20, and 60 Sec. elapses. Derive the state diagram of this system and its ROM implementation (including the hardware architecture). The size and content of ROM have to be indicated. You have to follows the code assignment for the following selected states: You can arbitrarily assign other codes to other non-specified states. Please indicate any unused state codes. Is your machine a Mealy, Moore type or mixed FSM? A traffic control system needs to be designed to control the lights in Fig. 1. Two sensors are E and L. When E=1, there is a vehicle toward the east direction; when L = 1, there is a vehicle to turn from South to West (left turn). The lights are shown in Fig. 1: East green (EG), East yellow (EY). East red (ER), and Right-turn-only Green (RG); North green (NG), North yellow (NY). North red (NR), and Left-turn-Green (LG); and South green (SG), South yellow (SY), South red (SR). Initially, East green, North red and South red lights are on and others off. After m = 20 Sec., East green is off and East Yellow-will be on for a short period d = 10 Sec.. East Red is on while East yellow- is off. Meanwhile, if L = 0, both North and South green lights turn on until M = 60 Sec. elapses and there is a vehicle from West (or E = 1); and if L = 1, South Red remains on. But Left-turn green. North green, and East right-turn-only Green lights turn on until L = 0. Next, Left-turn green and Right-turn-only Green lights turn off (no yellow lights between two stages) while North green remains on and South green light turns on until M = 60 Sec. elapses and there is a vehicle from West (or E = 1). After that, both North and South yellow- light will be on for d = 10 Sec. before they turn into red. Then it returns to the initial status, i.e., East green, North red and South red lights are on and others off. A T-intersection with notation: N-North, E-East, S-South, LG-Left-turn green, RG-Right-turn-only Green, G-Green. Y-Yellow and R-Red A timer can be started when S is high and signals d, m and M will be generated to supply to the controller when the corresponding time 10, 20, and 60 Sec. elapses. Derive the state diagram of this system and its ROM implementation (including the hardware architecture). The size and content of ROM have to be indicated. You have to follows the code assignment for the following selected states: You can arbitrarily assign other codes to other non-specified states. Please indicate any unused state codes. Is your machine a Mealy, Moore type or mixed FSM
