ARM Cortex-M4 Assembler

A Python-based assembler for ARM Cortex-M4 (Thumb-2) that converts my_assembly.s to my_assembly.bin.

Features

• Supports: Data Processing (ADD, SUB, MOV), Data Transfer (LDR, STR), Branch (B, BL, BX).
• Input: Assembly file (my_assembly.s).
• Output: Binary file (my_assembly.bin).
• Environment: Visual Studio Code with Python 3.

Setup

1. Install VS Code: Download.
2. Install Python 3:

   python3 --version

3. Clone Repository:

   git clone https://github.com/ibenzir/ARM-ASM-Project.git
   cd arm-assembler

Usage

1. Create my_assembly.s:

   ; my_assembly.s
   start:
       MOV R0, #10
       ADD R1, R0, #5
       SUB R2, R1, R0
       LDR R3, [R1, #4]
       STR R3, [R1, #8]
       B loop
   loop:
       BL subroutine
       BX LR
   subroutine:
       ADD R4, R3, R2
       BX LR

2. Run Assembler:

   python3 assembler.py my_assembly.s my_assembly.bin

3. Verify Output (For Windows OS):

   Format-Hex my_assembly.bin

VS Code Automation

• Create .vscode/tasks.json:

  {
      "version": "2.0.0",
      "tasks": [
          {
              "label": "Assemble",
              "type": "shell",
              "command": "python3 assembler.py my_assembly.s my_assembly.bin",
              "group": {"kind": "build", "isDefault": true}
          }
      ]
  }

• Run Task: Ctrl + Shift + P > “Tasks: Run Task” > “Assemble”.

• For Cross Platform: Read This.