Adventures with IP Integrator

Introduction

In this tutorial you will bring together all of the custom IP modules that you created in the previous set of practical exercises, along with other IP from the Vivado IP Catalog, to create a DSP system for implementation on the ZedBoard. IP for the control of the control of the audio codec on the ZedBoard will be introduced and all modifications to the IP Integrator design will be carried out. A software application will be developed in the SDK which will configure all of the IP modules and control the interactions between them and the PS.

The tutorial is split into three exercises as follows:

Exercise 5A - This exercise focuses on importing all of the custom IP modules into the Vivado IP Catalog for inclusion in an IP Integrator DSP design. The individual IP blocks will be explored, along with their customisable parameters.

Exercise 5B - The Analog Devices ADAU1761 audio codec on the ZedBoard will be introduced in this exercise, with the inclusion of some prepackaged IP. This IP implements the I2 S serial communication for sending and receiving audio samples to/from the audio codec. The audio samples are transfered between the PL and the PS via a standard AXI-Lite connection. In order to use the audio codec, a variety of modifications must be made to the Zynq PS, such as the inclusion of second fabric clock to drive the codec, and the enabling of a I2 C interface for the communication of control signals between the PS and the codec.

In order to map the external interfaces in the design to physical pins on the Zynq device, a Xilinx Design Constraints (XDC) file must be created and included in the design. This informs the synthesis and implementation processes in Vivado where to route the external interface signals. The format of the XDC file will be explored before generating the hardware for the finalised design.

Exercise 5C - In this final exercise, the finalised design from Exercise 5B will be exported to the SDK for software development. Here, the application which will control the interactions between the various custom IP modules, the PS and the audio codec will be created. The various software driver files will also be explored before building and running the application on the ZedBoard for testing.

NOTE: Exercise 5C requires you to be able to send keyboard commands to the Zynq PS via the UART terminal. To do this, it is necessary to use third-party terminal program. In this tutorial, we shall be using PuTTY which can be downloaded for free from the following link:

http:/www.chiark.greenend.org.uk/~sgtatham/putty/download.html You can download PuTTY as a standalone executable file so that no installation is required. To download the standalone executable, select the putty.exe download from the Binaries section.