This tutorial is not meant as a demonstration of the Vivado design flow. Readers are recommended to first go through Xilinx official tutorials and documentation before attempting this tutorial.
Arty – Building MicroBlaze in Vivado
Vivado Design Suite version Screenshot and design steps may differ in other versions. This tutorial was written and tested on the Xilinx KC However, most if not all 7 series FPGA development platforms should be suitable for this tutorial.
Make sure you have the proper debugger or debugging cable connected and that the board jumpers are configured accordingly. Before writing a software application for any Xilinx programmable devices it is first required to create the hardware design. This tutorial aims at building a hardware design with the following components. Open the Vivado IDE as the start page. See Also:. From the getting started page click "Create New Project". This should open the new project wizard. Type in the project name and location.
Make sure "Create project subdirectory" is checked. Click Next. Select "RTL Project" as the project type and check the "Do not specify sources at this time" checkbox. This should bring you in the main Vivado IDE project view with a blank project.
In the flow navigator select the "Create Block Design" item. Invoke the block automation dialog for the MIG. This should be highlighted in green at the top of the canvas and can be started by clicking "Run Block Automation". Run block automation on the MicroBlaze. For simplicity we'll leave cache disabled in this example. Double click on the MicroBlaze and navigate to page 4. In the Sources tree right click the block design file and select "Generate Output Files".The goal is to develop an additive synthesis engine.
The synthesizer needs a processor to implement high level functionality. The idea is that once we have a general computing platform we can more easily develop high level C programs that interface with custom hardware peripherals, such as the I2S transmitter and sine wave generator described in previous articles.
There are quite a number of tutorials about setting up a Microblaze processor. Unfortunately most of these tutorials are either out of date or they are lacking some essential information.
The designed platform has the following features:. I started following Microblaze server tutorial from Digilent. It misses some information in the block design to complete Ethernet and DDR2 configuration. Lastly I followed this tutorial on Bootloading to implement the bootloader. Add an empty XDC in the project folder In the TCL window run. First step is to specify the architecture of the synthesized FPGA hardware blocks.
Pay careful attention to configuration of the clock wizard, the MIG7 memory generator and polarity of reset signals. After adding the Microblaze processor click on it to customize it:. A green box will appear containing a link to "Run block automation". Clicking the link and Vivado will create additional IP blocks to support the Microblaze.
When clicking "Run block automation" a settings window will appear:. In a first attempt I added a DDR2 controller. The 'run block automation' reappeared. I wondered why this was a different component comparing it to the "AXI interconnect" created by the Microblaze Block Automation. The documentation notes that both "Axi SmartConnect" and "Axi interconnect" have similar functionality and that "Axi SmartConnect" supersedes "Axi interconnect".
In this design I will use one to keep things simple. I'll have to check later how this impacts performance. Two clocks are required because the DDR2 controller is part of a different clock domain. Add the IP and customize it by double clicking:. The serial port is accessible via USB. The interrupt controller signals the Microblaze once an external event needs to be handled by the processor. Interrupts are generated by the Timer and Ethernetlite component. Note that the intr input is initially displayed as intr.
This will update automatically to intr once the design is validated.You can program the processor just like any other embedded processor.
And interface any custom hardware very easily by using the programmable logic. Connect the following signals as such:. At this point, all the clocks and signals are connected and the MicroBlaze component will function correctly, but we still need to setup the connection between the two processors to allow the MB to use the ARM UART. Notice that one of the arrows turns green back in the diagram. Now comes the hard part. We need to download two ELF executables to the device.
The problem is, that we need to reset each of the processors. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Share this: Twitter Facebook. Like this: Like Loading Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:.
Now the Hardware design is exported to the SDK tool. We will use SDK to create a Software application that will use the customized board interface data and FPGA hardware configuration by importing the hardware design information from Vivado. When you first run Vivado this will be the main start window where you can create a new project or open a recent one. Toggle Navigation. Store Blog Forum Projects Documentation.
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Creating a New Project 2. Creating New Block Design 3. Adding Microblaze IP and Customization 4. Running Connection Automation for the First Time 7. First Manual Connection 8. Running Connection Automation for the Second Time Second Manual Connection Validate Design Generating Bit File Launching SDK Inside SDK for Vivado Selecting Hello World Application from available templates Created a.
Xilinx Vivado X with the SDK package. Board Support Files. Choose the Project Name and Location such that there are no blank spaces. This is an important naming convention to follow for project names, file names and location paths. Underscore is a good substitute for empty spaces.
It is good practice to have a dedicated folder for Vivado Projects, preferably with the smallest possible path length. Name your Project and select the Project location and click Next.
Leave the Do not specify sources box unchecked and click Next. Nexys 4 DDR should be displayed in the selection list. A mismatch in selecting the correct board name will cause errors. Click Finish. The flow navigator panel on the left provides multiple options on how to create a hardware design, perform simulation, run synthesis and implementation and generate a bit file. You can also program the board directly from Vivado with the generated bit file for an RTL project using the Hardware Manager.
For our design, we will use the IP Integrator to create a new block design. Give a name to your design without any empty spaces.
When a new IP block is added the user can customize the block properties by either clicking on the Run Block Automation message prompt or by double clicking on the block itself. This will customize the block with our new user settings.In this tutorial, you will be introduced to the tool flow for simple MicroBlaze designs.MicroBlaze & IP Integrator
You must complete the following installation items before you can follow the steps of this tutorial:. The steps in this section will guide you through the process of creating a hardware platform for your embedded FPGA design. The ultimate product is a bitfile you can use to download to your FPGA.
Now that the hardware is designed, you can write software to run on your embedded MicroBlaze hardware platform. This section will guide you through the process of downloading your code. Now that we have learned how to work with pre-built hardware IP peripherals, you will now create a simple custom IP peripheral that allows you to access the LEDs from software. We have covered quite a lot of ground in this tutorial.
It is critical that you understand each step of this development process, as this is critical to your next lab and the final project. Be sure you ask your instructor if you are unsure about anything we covered in this tutorial.
Specifically, you should understand the following:. Status Complete Handout handThe Arty board is the next generation of the very useful LX9 MicroBoard however, it takes account of advances in devices and interfacing.
I ordered mine just before I recently flew to Japan, and it was waiting for me when I returned. The Arty is marketed as the perfect development platform for MicroBlaze applications as such when I opened my Arty the first thing I wanted to do was a new build from scratch of a MicroBlaze system.
This way I could really understand the ease or not with which it could be developed, in the end it was very easy to create both the hardware application and create the simple software to say hello world. While it may seem daunting these stages can be achieved quickly, also I am not going to talk you through how to do the first two points as they are very straight forward.
Within the arty directory you will then see the board definition XML and most helpfully a mig. Once we have the project created the next step is to create the MicroBlaze system, to do this we need to create a block diagram within which we can create our system.
You can create a block diagram by selecting Create Block Diagram option under the Flow Navigator on the left of Vivado. The one thing we have not done by this point is to connect up the IO on the design to those on the board.
Nexys 4 DDR - Getting Started with Microblaze
We can do this by selecting on the board tab within the block diagram. This saves us from having to write a XDC file with the pin locations needed to ensure we use the correct IO with the board. With this completed we can validate our design and we should not get any warnings — if you have any address issues see he Address Editor tab mine looked like below when it was validated OK.
Once it has validated OK you are in a position that you can build the hardware, and export the hardware definition to SDK. I will post another blog tomorrow on how to get the SDK side of things up and running but below is the result.
This enables us to create a new project and select the Arty board, which is our next step Once we have the project created the next step is to create the MicroBlaze system, to do this we need to create a block diagram within which we can create our system. When it is all complete your diagram will look like the below The one thing we have not done by this point is to connect up the IO on the design to those on the board.
With this completed we can validate our design and we should not get any warnings — if you have any address issues see he Address Editor tab mine looked like below when it was validated OK Once it has validated OK you are in a position that you can build the hardware, and export the hardware definition to SDK. I will post another blog tomorrow on how to get the SDK side of things up and running but below is the result Below are the MicroBlaze customisations.
Someone can give me some explanation about this point? Here below my full implemented code:. I've do some simple change to adapt the code to my case, the change reside in how to manage the interrupt transmission, I've used the TxIsDone flag to know when the transmission was finished and then get another one, in this way I'm sure to start a new transmission just after the old one is completed see the SendHandler function.
Total transmissione time check Now I can see a CPS equal approximatively toif this value reflect the Chars Per Seconds sounds to me higher than the correct value should be. This give theorically character every seconds if we suppose zero delay time between the frame so is a upper theoretical limit.
Someone have seen this behaviour and found a way to overcome this problem? I'm not certain on the differences between the two interrupt controllers, you will likely need to contact Xilinx to see if they have any additional thoughts or concerns on this.
As for the SDK debugging behavior, according to this Xilinx sitethe GDB mode is depreciated, so you will likely want to instead use the "Launch on Hardware System Debugger " option instead for some better results, as this Xilinx forum thread seems to indicate as well.
Taking a look at this threadyou may need to re-generate your BSP sources, or potentially delete it and create a new one. I would also make sure that all of the SDK settings I'm not certain if you have changed any are on their default settings. Thank you JColvin.
I've did many test with the System Debugger but results is still the same and I'm unable to perform the debugging. The patch tried was not working with the You need to be a member in order to leave a comment. Sign up for a new account in our community. It's easy! Already have an account? Sign in here. Posted April 12, The better approach involve the use of interrupts in order to manage the RX and TX operations.
Concerning this example I've some question to asking. Starting from the SDK I've opened the xparameters. Share this post Link to post Share on other sites.
Recommended Posts. Posted April 12, edited.