交通灯控制器

我在做一个用altera Quartus II family：APEX２０KE 的 交通灯控制器,代码过后会输入FPGA" class="t_tag">FPGA芯片.请高人指点，有完整报告更好，时间紧逼

The controller to be designed controls the traffic lights of a busy highway (HWY)
intersectin
g a side road (SRD) that has relatively lighter traffic load. Figure 1 shows
the location of the traffic lights. Sensors at the intersection detect the presence of cars
on the highway and side road. The Figure implies that both the highway and side
roads offer single lanes for traffic in each direction. Both roads have ordinary (Red,
Yellow, Green) signal lights. The intersection is fitted with a sensor.

Finite-state machine specifications
The traffic light controller works in the following way.
1. The lights controller makes use of car sensors at the intersection of the side road
with the highway, to sense presence of cars.
2. The lights controller makes use of three timers: a 60 seconds timer (T60), a 30
seconds timer (T30), and a 10 seconds timer (T10). Once a trigger signal is applied
to a timer, the timer output is zero and becomes 1 after the programmed time
period. For example, upon reset, the T30 timer output is '0' and will become '1' after
30 s have elapsed and stays '1' until reset by the controller.
3. Pedestrians can use the intersection by pressing buttons and debouncing switches.
Pedestrians will need to cross the highway only since crossing the side road is
assured most of the time.
4. HWY lights remain green as long as there are no cars triggering the SRD sensors.
5. When HWY lights have been green for a minimum of 60 seconds, a car on SRD
may cause HWY lights to cycle through yellow to red states.
6. Meanwhile, SRD lights will turn green and remain green for a minimum of 30
seconds. Further application of SRD sensors beyond the 30 seconds will enable
SRD to remain green for a maximum of 60 seconds.
7. SRD lights will cycle through yellow and red states and HWY lights will then turn
green.
8. The lights stay yellow for 10 seconds.
9. Each traffic post has three lights GREEN, YELLOW and RED.
10. In the default state, HWY lights show GREEN and SRD lights show RED.

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