文件名称:traffic_lights
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交通灯控制器控制红（r）、绿（g）、黄（y）三种不同颜色的交通灯，这三种不同颜色灯的亮、灭分别由三个定时器（timer1、timer2、timer3）控制；
当某个定时器工作时，它所控制的交通灯亮，直到设定的定时时间到（该定时器状态由’0’变’1’），交通灯跳转到另一种状态；
clk是脉冲控制端（图中未标出）；reset是异步复位端，复位状态为红色交通灯亮；
输出端r、g、y分别表示三种颜色交通灯的亮、灭状态。
- traffic light controller control red (R), green (g), yellow (y) three different colors of traffic lights, three different colors of bright lights, off by three timer (Timer1, Timer2, Timer3 ) control When a timer work, it controls the traffic lights, until the set timing (the timer status ' 0 ' for ' 1' ), traffic lights Jump to another state clk is the pulse control terminal (not shown) reset is asynchronous reset terminal, the reset state for the red traffic lights output terminal r, g, y represent the three colors of traffic lights bright, the off state.
当某个定时器工作时，它所控制的交通灯亮，直到设定的定时时间到（该定时器状态由’0’变’1’），交通灯跳转到另一种状态；
clk是脉冲控制端（图中未标出）；reset是异步复位端，复位状态为红色交通灯亮；
输出端r、g、y分别表示三种颜色交通灯的亮、灭状态。
- traffic light controller control red (R), green (g), yellow (y) three different colors of traffic lights, three different colors of bright lights, off by three timer (Timer1, Timer2, Timer3 ) control When a timer work, it controls the traffic lights, until the set timing (the timer status ' 0 ' for ' 1' ), traffic lights Jump to another state clk is the pulse control terminal (not shown) reset is asynchronous reset terminal, the reset state for the red traffic lights output terminal r, g, y represent the three colors of traffic lights bright, the off state.
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traffic_lights.vhd