本次实验我们需要构建一个交通灯系统，并接口到 PIC 微控制器。使用三

In this experiment, we need to build a traffic light system and interface to the PIC microcontroller. Use three onboard MX20 LEDS as a group of lights. For the second set of light construct the tape on the breadboard and connect to the 25-way connector on the MX20 board. We need a switch to choose between a safe sequence and an unsafe sequence. Write a program for the PIC microcontroller to control the following traffic light system. There are six lights to operate. The red, amber, and green lights in the north-south direction will be designated as R1, A1, and G1. Similarly, the east-west direction lights will be called R2, A2, and G2. When the digital output signal is in Logic-1 state, they will turn on their respective indicator lights, otherwise the indicator lights will be off. There are two types of road intersections: unsafe intersections that use a simple sequence, and safe intersections that require a longer (delayed green) sequence. A digital input signal named SAFE will be used to switch traffic lights between SAFE and UNSAFE sequences. (Logic 1 selects the SAFE sequence, logic 0 selects the unsafe sequence). When the traffic light switches to the SAFE sequence, a beep is generated to indicate that pedestrians can cross the intersection (ie red, red).

In this experiment we need to build a traffic light system and interface it to the PIC microcontroller. Use three on-board MX20 LEDS as a set of lights. For the second set of light build breadboard straps and connect to the MX20 board 25-way connector. We need a switch to choose between a safe sequence and an unsafe sequence. Write a program for the PIC microcontroller to control the following traffic light systems. There are six lights to operate. The red, amber, and green lights in the north-south direction are specified as R1, A1, and G1. Similarly, east-west lights will be called R2, A2, and G2. When the digital output signals are in logic-1, they turn on their own lights, otherwise the lights will go out. There are two types of road intersections: unsafe intersections that use simple sequences, and safe intersections that require longer (delayed green) sequences. A digital input signal called SAFE will be used to switch traffic lights between the SAFE and UNSAFE sequences. (Logic 1 selects the SAFE sequence, Logic 0 selects the unsafe sequence). When the traffic light switches to the SAFE sequence, a chime is generated indicating that pedestrians can cross the intersection (i.e. red, red).

In this experiment, we need to build a traffic light system and interface to PIC microcontroller. Use three onboard mx20 LEDs as a set of light. For the second set of light, build the belt on the bread board and connect it to the mx20 board 25 way connector. We need a switch to choose between safe and unsafe sequences. Write a program for PIC microcontroller to control the following traffic light system. There are six lights to operate. Red, amber, and green lights in the north-south direction will be designated R1, A1, G1. Similarly, the East-West lights will be called R2, A2 and G2. When the digital output signals are in the logic-1 state, they will turn on their respective indicator lights, otherwise the indicator lights will go out. There are two types of road junctions: unsafe intersections using a simple sequence and safe intersections requiring a longer (delayed green) sequence. A digital input signal called safe will be used to switch traffic lights between safe and unsafe sequences. (logic 1 selects safe sequence, logic 0 selects unsafe sequence). When the traffic lights are switched to the safe sequence, a prompt tone is generated to indicate that pedestrians can cross the intersection (i.e. red and red).<br>