James Hagerman JamesHagerman

How to get firmware onto mutable modules

I had the best luck with the Black Magic Probe and gdb.

Install compiler

First install the arm compiler:

sudo add-apt-repository ppa:team-gcc-arm-embedded/ppa

Convert some stuff...

This uses:

https://hub.docker.com/r/jagregory/pandoc/

PDF

docker run -v `pwd`:/source jagregory/pandoc -f markdown_github -t latex --latex-engine=xelatex all-notes.md -o allnotes.pdf

LayerOne 2017 Badge Notes

The badge for LayerOne 2017 runs on an STM32 ARM embedded microprocessor. Most of the notes about this board can be dug out of CharlieX's page on Hackaday.io: https://hackaday.io/project/13262-layerone-2017

Known bugs

Yes, there are a few. Word on the street is that when the original code is compiled under Linux, the USB doesn't enumerate! There is a fix for this... but then the SD card doesn't work correctly

PLEASE let me know if you figure out what could be causing this!

How to setup hostapd based router

Install some tools you'll need with: apt-get install -y hostapd dnsmasq wireless-tools iw wvdial

Note that some wifi cards just plain don't work with hostapd. Sorry.

Setup your network interfaces correctly

This is done in /etc/network/interfaces:

Disassembling 1bitsy examples using radare2

Note that because radare2 uses Capstone to disassemble ARM code, there are issues with the disassembly. arm-none-eabi-objdump -d compiledbinary.elf actually does a better job in some cases. For example, msr isn't decompiled correctly...

First, you have to either strip the default ELF binaries the default Makefiles build when you run make OR you need to just compile .bin files using something like:

make binaryname.bin

	set(PRJ_NAME CLion_STM_LED)
	set(MCU_FAMILY STM32F1xx)
	set(MCU_LINE STM32F103xB)
	set(MCU_LINKER_SCRIPT STM32F103RBTx_FLASH.ld)

	cmake_minimum_required(VERSION 3.6)

	project(${PRJ_NAME} C ASM)

	add_definitions(-D${MCU_LINE})

	#!/bin/bash

	#gconftool-2 --set /apps/gnome-terminal/profiles/Default/use_theme_background --type bool false
	#gconftool-2 --set /apps/gnome-terminal/profiles/Default/use_theme_colors --type bool false
	#gconftool-2 -s -t string /apps/gnome-terminal/profiles/Default/background_color '#41414d4d3d3d'
	#gconftool-2 -s -t string /apps/gnome-terminal/profiles/Default/foreground_color '#d3d3cfcfcdcd'
	#echo 'setting funk colors'
	#gconftool-2 -s -t string /apps/gnome-terminal/profiles/Default/palette '#3c3c2d2d2626:#f7f700007c7c:#7c7cf7f70000:#f7f77c7c0000:#00007c7cf7f7:#7c7c0000f7f7:#0000f7f77c7c:#b6b6a7a79f9f:#7c7c6d6d6565:#ffff5454a9a9:#a9a9ffff5454:#ffffa9a95454:#5454a9a9ffff:#a9a95454ffff:#5454ffffa9a9:#f4f4e5e5dddd'

	# Oops! We have moved on to dconf:

	if [[ -z $ZSH_THEME_CLOUD_PREFIX ]]; then
	ZSH_THEME_CLOUD_PREFIX='☠'
	fi

	PROMPT='%{$fg_bold[yellow]%}$ZSH_THEME_CLOUD_PREFIX %{$fg_bold[green]%}%p %{$fg[green]%}%c %{$fg_bold[cyan]%}$(git_prompt_info)%{$fg_bold[blue]%} % %{$reset_color%}'

	ZSH_THEME_GIT_PROMPT_PREFIX="%{$fg[green]%}[%{$fg[cyan]%}"
	ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}"
	ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[green]%}] %{$fg[yellow]%}⚡%{$reset_color%}"
	ZSH_THEME_GIT_PROMPT_CLEAN="%{$fg[green]%}]"

	# My edits:
	alias ip='ip -c'

	# Set some colors up:
	# Oops! We have moved on to dconf:
	echo "setting FUNK colors"
	# This should be "Default"
	profile_id=b1dcc9dd-5262-4d8d-a863-c897e6d979b9
	#profile_id=$(gsettings get org.gnome.Terminal.ProfilesList default)
	dconf write /org/gnome/terminal/legacy/profiles:/:$profile_id/bold-color-same-as-fg "true"

	#!/bin/bash

	logger "Telling kernel to turn on ipv4 ip_forwarding"
	echo 1 > /proc/sys/net/ipv4/ip_forward
	logger "Done. Setting up iptables rules to allow FORWARDING"

	DOWNSTREAM=wlan0 # wlan0 is client network (running hostapd)
	UPSTREAM=eth0 # eth0 is upstream network (internet)

	# Allow IP Masquerading (NAT) of packets from clients (downstream) to upstream network (internet)