This project implements a Body Control Module (BCM) on the ARM7 LPC2129 microcontroller.
The goal is to simplify vehicle wiring, reduce manufacturing and maintenance costs, and ensure real-time performance using CAN (Controller Area Network) communication.
- 🧠 Microcontroller: ARM7 LPC2129
- 📡 Communication: CAN Protocol
- 🔁 Functions Controlled:
- Left & Right Indicator LEDs
- Windshield Wiper
- 16x2 LCD Display (4-bit Mode)
- 💡 Interface:
- Push buttons for manual control
- LCD for status display
| File Name | Description |
|---|---|
trans.c |
Transmitter logic with LCD display and push button controls. Sends CAN frames to nodes based on input. |
left_led.c |
Receives CAN ID 0x0A and toggles the left indicator LED. |
right_led.c |
Receives CAN ID 0x0B and toggles the right indicator LED. |
wiper.c |
Receives CAN ID 0x0C and controls wiper motor direction. |
can_fun.c |
CAN protocol initialization, frame TX/RX, delay functions. |
4bitdisplay.c |
LCD initialization and display functions using 4-bit mode. |
-
BCM Transmitter (
trans.c):- Listens for button presses (SW1, SW2, SW3).
- Displays status on LCD.
- Sends corresponding CAN frame (
0x0A,0x0B,0x0C) to activate modules.
-
Receivers:
- Each receiver node listens for its respective CAN ID.
- Toggles the corresponding output: left LED, right LED, or wiper motor.
-
CAN Communication:
- Initialized with
can_init(). - Uses
txd()andrxd()to transmit and receive CAN frames.
- Initialized with
- Register-level programming with LPC2129.
- CAN protocol configuration and real-time messaging.
- Peripheral control using GPIO and I/O registers.
- LCD interfacing in 4-bit mode.
- Code modularity, interrupt-free logic for real-time systems.