Here we will experiment with Raspberry Pi 3 Model B+ board. I have built some image for it using OPTEE manifest. I am currently using Ubuntu 16.04 OS. I have faced some dependency issue while building the complete set of images. Hardware required: 1. Raspberry Pi 3 Model B+ 2. USB to serial cable (BaudRate = 115200) 3. Power Cable or MicroUSB cable (I have drawn power from my PC) 4. Micro SD card formatted in FAT32 format. Serial Cable Connection with PI Refer to this diagram. PIN 6, 8 & 9 shall be used. In my case I have drawn power from my PC, hence I didn't required any GND connection. How to Build images: Prerequisite: Following dependencies need to be installed.: $ sudo apt-get install android-tools-fastboot autoconf bison cscope curl flex gdisk libc6:i386 libfdt-dev libglib2.0-dev libpixman-1-dev libstdc++6:i386 libz1:i386 netcat python-crypto python-serial uuid-dev xz-utils zlib1g-dev libssl-dev curl repo vim $ sudo apt install py...