Simple Trafficlight System - HCMUT MCU-MPU Assignment

General Information:

• Major components: Custom board with STM32F103RBT6 MCU.
• Supporting multiple communications protocol: I2C, SPI, UART...
• Purpose: Implement a simple traffic light system.
• Components' usage:
  • UART Communication to control the system from host computer.
  • LCD for displaying information.
  • Led Pannel for traffic light signal.
  • Dip switch for select board ID or change mode to test.
  • Eprom 25LC512 for saving data.

About the Project Layout:

• Schematic_Design folder contains the design for all components.
• Modules folder is where we implement the library for each components seperately.
• STM32F103RBT6 folder consists of the whole project with all configurations and source code:
  • global.h & .c: all global variables and labels.
  • led_pannel.h & .c: control the leds.
  • app_i2c_lcd.h & .c: working with lcd.
  • fsm.h & .c: run the system.
  • uart_reading.h & .c: intercept uart command and execute the corresponding feature.
  • app_25LC512.h & .c: using Eprom to store and fetch data.
  • software_timer: provide a timer .

About the System's Behavior:

• Initially, system runs in auto mode: Led Panel for trafficlight, LCD displays wait time for each lane and the state (RED, GREEN, YELLOW) of that lane, whenever one lane in YELLOW state, a buzzer will turn on every 1 sec to warn the vehicles slowing down for pedestrian crossing the road.
• We define a set of uart command as following:
  • !R# : Come back to AUTO mode.
  • !1# : Changing wait time for green light, also known as MODE2.
  • !2# : Changing wait time for yellow light, also known as MODE3.
  • !+# : Increase wait time 1 unit.
  • !-# : Decrease wait time 1 unit.
  • !O# : Save any changes and come back to AUTO mode.
• While in MODE2 or MODE3, traffic light will toggle to the corresponding light (ex: green light on both lane on if in MODE2) and a light at the pin PB2 will blink every 1 sec. Besides, LCD will display mode and the current wait time of that mode.