IoT basics with ZYBO (Zynq)

This is a project to create an IoT device with ZYBO (Zynq). I implemented a web server using Python and bottle framework, which works with another C++ application. The C++ application controls my custom IPs (such as PWM) implemented in PL block. A user can control LEDs, 3-color LEDs, buttons and switches mounted on ZYBO board.

YouTube Video: https://youtu.be/z613J8RVpog

Development Environment

• Target Board: ZYBO (Z7-20)
• Host PC: Windows 10 64-bit
  • Vivado 2017.4 WebPACK (for HW design)
  • Xilinx SDK 2017.4 (for C++ application development)
  • Visual Studio Code (for Python script development)
• Host PC: Ubuntu 16.04 (on VirtualBox 5.2.4)
  • PetaLinux 2017.4 (for Linux/Boot image making)

Source Code

• Vivado Project
  • https://github.com/take-iwiw/ZYBO_IoT_Vivado
• Xilinx SDK Project
  • https://github.com/take-iwiw/ZYBO_IoT_SDK
• PetaLinux Project
  • https://github.com/take-iwiw/ZYBO_IoT_PetaLinux
  • includes:
    • C application binary (built by XSDK)
    • Python script
    • init.d script

How to Build

You need to work on PetaLinux. Pre-built C application binary and Python script are already installed in PetaLinux project. So, all you need is the process 4 in the above picture.

git clone https://github.com/take-iwiw/ZYBO_IoT_PetaLinux.git
cd ZYBO_IoT_PetaLinux/PjIoT
# Modify `SERVER_URL` variable in main.js depending on your environment. The current value (192.168.1.87) is in my environment.
code project-spec/meta-user/recipes-apps/myinit/files/ServerIoT/static/js/main.js &
petalinux-build
petalinux-package --boot --force --fsbl images/linux/zynq_fsbl.elf --fpga images/linux/design_iot_wrapper.bit --u-boot

Copy created files (images/linux/BOOT.bin and images/linux/image.ub) to SD Card (FAT 32 format). After starting ZYBO with the SD card, you can access http://192.168.1.87:8080/ from a browser in the same network as ZYBO. (again, the IP address varies depending on the environment).

More Information

https://qiita.com/take-iwiw/items/e9311292c5078d785699

Keywords (technology I used in this project)

• bottle
• Ajax
• Device Tree (dts, dtsi)
• User space IO (UIO)
• Named pipe
• Modifying the Petalinux Yocto recipe to install a directory