LPC2129-Based-Calculator

This project simulates a calculator using LPC2129 ARM7 microcontroller. Input expression comes from UART and output is displayed on LCD and UART

Features

• Supports +, -, *, / operations with precedence
• Input via UART terminal
• Output on 16×2 LCD (4-bit mode) and UART
• Works on Keil + Proteus simulation

Hardware / Pins (Proteus setup)

• MCU: LPC2138 / LPC2129
• UART0: P0.0 (Tx), P0.1 (Rx)
• LCD data: P0.20–P0.23, RS/RW/EN as per schematic
• LEDs: if used (optional)

Build Instructions

1. Open Keil project
2. Compile → generate .hex

Simulation (Proteus)

1. Load .hex in MCU
2. Add Virtual Terminal (9600-8-N-1)
3. Connect MCU TX→Terminal RX, Rx→Tx
4. Run Simulation