BDMRipper

Overview

A Python script POC which lets me use a raspberry pi 2 as a BDM debugger

Features

• GPIO-based bit-banging implementation of the BDM protocol.
• Memory read/write operations.
• CPU register access and modification.
• Memory dumping capabilities (Binary, HEX, and Motorola SREC formats).
• Interactive command-line interface with extensive command support.

GPIO Pin Assignments

Signal	Description	Default GPIO Pin
DSI	Data Serial Input	13
DSO	Data Serial Output	6
DSCLK	Data Serial Clock	19
BKPT	Breakpoint signal	26
RESET	Reset signal	17

Interactive Console Commands

Command	Description
init	Initializes BDM connection
wm	Writes memory at given address
dump	Dumps memory contents
dumpfile	Dumps memory region to file
quickdump	Quickly dumps predefined regions
rr	Reads CPU register
wr	Writes CPU register
regs	Displays all CPU registers
map	Shows MCF54415 memory map

Usage

Run script with:

python3 bdm_interface.py --console

Examples

• Connect to target:

  init
  

• Write memory:

  wm 0x20000000 0xDEADBEEF
  

• Memory dump to file:

  dumpfile 0x20000000 0x20001000 sram_dump.bin bin
  

• Quickdump BootROM:

  quickdump bootrom
  

Notes

• Ensure GPIO wiring matches pin configuration.
• Requires RPi.GPIO Python library installed.
• Run as root or with appropriate GPIO permissions.