Microcontrollers&Embedded Systems

• SO YOU WANT TO BUILD AN EMBEDDED LINUX SYSTEM? A primer on how embedded Linux systems are developed, plus an exploration of the hardware and software ecosystems of ten different commonly-available CPUs
• Anatomy of cross-compilation toolchains
• From zero to main(): Bare metal C
• Demystifying Firmware Linker Scripts
• Get the most out of the linker map file
• Cross debugging for ARM / MIPS ELF with QEMU/toolchain
• Emulating Embedded Linux Devices with QEMU
• Emulating Embedded Linux Systems with QEMU
• GNU Build IDs for Firmware
• ARM Cortex-M RTOS Context Switching
• CPU caches with examples for ARM Cortex-M
• ARM-X Firmware Emulation Framework
• Awesome IOT
• Analyzing Malware for Embedded Devices: TheMoon Worm
• Build a Debian Jessie root filesystem
• Device Tree for dummies
• Device Tree Usage
• Series about hardware analysis and firmware reversing
  • Part 1 Hunting for Debug Ports
  • Part 2 Scouting the Firmware
  • Part 3 Following the Data
  • Part 4 Dumping the Flash
  • Part 5 Digging Through the Firmware

• Using Asserts in Embedded Systems

• nvram-faker A simple library to intercept calls to libnvram when running embedded linux applications in emulated environments.

Power management

• Racing to Sleep

Bootloader

• A tour of bootloading

GPIO

Usually an embedded system has a certain numbers of devices interconnected via different signals. To configure these interconnections in some cases gpio are used.

>>> gpio2num = lambda a,b:(a -1)*32 + b
>>> print gpio2num(7,16)
208
>>> print gpio2num(7,9)
201
num2gpio = lambda x: (x /32 + 1, x%32)
>>> num2gpio(98)
(4, 2)

• Definitive GPIO guide

Update mechanisms

• Mender Mender is a secure and robust software update system designed to handle large number of devices. Mender is designed according to a simple client/server architecture, allowing central management of deployments to all devices.
• RAUC is a lightweight update client that runs on your embedded device and reliably controls the procedure of updating your device with a new firmware revision