Microprocessor & Assembly Language

[Uni · Microprocessor Architecture · 2023]

ARM Cortex-M3 programming experiments on the LPC1768 microcontroller board, covering assembly language assignments and embedded C lab exercises.

Hardware

NXP LPC1768 — ARM Cortex-M3 @ 100 MHz

• 512 kB Flash, 64 kB RAM
• 8-channel 12-bit ADC, 10-bit DAC
• 4 general-purpose timers, motor control PWM
• USB Device/Host/OTG, Ethernet MAC, 4 UARTs, 3 SPI/SSP, 3 I2C

Contents

Assignments (ARM Assembly)

Folder	Topic
Assignment_01/	Basic ARM assembly — arithmetic, branching, loops (5 exercises)
Assignment_02/	Memory operations and subroutines
Assignment_03/	Stack, interrupts, and system calls

Lab Experiments (Embedded C)

Experiment	Description
turn on led with timer/	GPIO LED blink using hardware timer
turn on led with joystick/	Joystick input → LED output
change led brightness with joystick (without PWM)/	Manual PWM via delay loops
EXINTs with priority/	External interrupt configuration with priority levels
EXT interrupt vs GPIO interrupt/	Interrupt type comparison
interrupt occuration counter/	Count interrupt occurrences
Displaying Scrolling text on LCD/	LCD character display with scrolling
Display a Wave on LCD/	Waveform rendering on LCD
Motor-Controller/	DC motor control via H-bridge

Tools

• Keil MDK (uVision) — ARM assembly and embedded C IDE
• CMSIS — Cortex Microcontroller Software Interface Standard