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  • Tutorial
In this tutorial we will construct an Interactive Logic project using some of the major design features. Then the finished design will be compiled and downloaded into your Hevday Logic Module for monitoring and data manipulation. Tutorial Steps:
  1. Interactive Logic Configuration
  2. Project Creation
  3. Creating a user defined schematic
  4. Designing a schematic symbol
  5. Creating a state diagram
  6. Constructing the top level
  7. Compiling and downloading
  8. Monitoring and forcing data
  • Step 1: Interactive Logic Configuration
Before creating your first project you must specify a folder where Interactive Logic project folders will reside. The folder you select should not contain any spaces in it's path which would make it unacceptable to the Xilinx compiler tools. To specify a folder, open the options dialog by selecting 'Options' on the Configuration menu and then select the 'Project Folders' item in the sections list on the left hand side of the dialog.
Options Dialog
If there are already one or more folders specified in the list then you can skip the rest of this step. Click the 'Add' button and select an existing empty folder or create a new folder. Now the folder's path should be visible in the Project Folders list view of the options dialog. Interactive Logic also requires information about how to connect to the Hevday Logic Module. The IP address of the Hevday Logic Module must be entered into the Options dialog under the Communication section. See the Network Hardware Configuration.
  • Step 2: Project Creation
To create our new empty project invoke the ' New Project' action by selecting it from the File menu, or pressing Ctrl+N. You will be presented with the New Project Dialog:
New Project Dialog
Type in the name 'MyProject' into the 'New project name:' field then click the 'OK'. Interactive Logic will now be displaying your new empty project.
  • Step 3: Create a user defined schematic
From the Project menu invoke the New Schematic action and type in 'MySchematic' for the name of the schematic. Leave the category field blank and click the 'OK' button. The new schematic is automatically activated in the Design Canvas.
On this schematic we are going to combine a 32 bit unsigned level activated counter, and a forceable reset. Our intention is to make this combination available to the project as a single symbol. Start by dragging components from the Project Tree onto the Design Canvas and arrange them like so:
Component Placement
Next double click on each input pin and output pin and name them in accordance with the diagram below so that our wrapper has the same interface names as the counter that we are using. To show the pin labels, right click on a pin and select 'Show Label North/East/West/South'. You can also select a number of components by dragging a selection rectangle around them and right clicking on one of them, then selecting one of the show labels menu items. Finally using the Wiring Tool connect up the components as in the diagram:
Wired
  • Step 4: Designing a schematic symbol
Invoke the Edit Symbol action to display the Symbol Editor so that we can customise the symbol for the schematic. First we need to adjust the size of the symbol so that the 32 bit number from the counter will fit inside the symbol. This can be done by increasing the width of the symbol to 14. Once this is done, adjust the lines and text of the symbol so that the right hand edge fits in with the three output pins. Adjusting the lines and text of the symbol to fit the new width can be done easily by selecting all the lines to move at once by holding down the Shift key and clicking on the lines to select, then dragging all the lines across:
Widen Schematic
Now we are ready to place our data items onto the symbol. Activate the Data tab of the Symbol Editor and expand the data tree to reveal the data items for the forceable buffer and the counter. You will see a DataGfxBit, a ThreeSwitch and an Integer. Drag the Integer into a suitable position on the symbol, then drag the ThreeSwitch on to the symbol as well. The final symbol should look like this:
Final Symbol
  • Step 5: Creating a state diagram
From the Project menu invoke the New State Diagram action and type in 'MyStateDiagram' for the name of the state diagram. Leave the category field blank and click the 'OK' button. The new state diagram is automatically activated in the Design Canvas. For the design of this state diagram we are going to have three states in a loop, each state with a single output. Start by dragging states and transitions from the Project Tree onto the Design Canvas and arrange them like so:
States & Transitions
Next double click on each state to edit the state's name. Name each state 'State One', 'State Two', 'State Three' respectively, as shown below. To add an output to each state invoke the Edit State Diagram Outputs action from the Schematic menu and add three outputs, checking the correct check box so each state has one output. After that, select each transition in turn and move the transition's control points so the transitions connect the states in a loop. Transition ends are correctly placed when they snap to the outline of a state. Double click on each transition and name them T1 through T3. Finally right click on State One and select 'Set as Initial State'. The end result should be a diagram like so:
Final State Diagram
Notice that State One is coloured green to indicate it will be the initial state upon startup. Unlike Step 4 where we designed a symbol for a schematic, state diagrams always use automatically generated symbols, so the Symbol Editor is unavailable.
  • Step 6: Constructing the Top Level
Activate the Top Level Schematic in the Design Canvas by double clicking it in the Project Tree. Drag and drop a single instance of your newly created schematic and state diagram from the 'Schematics' section of the Project Tree onto the Design Canvas. Then connect forceable buffers to all inputs like so:
Top Level
  • Step 7: Compiling and Downloading
We are now ready to compile and download the design. Invoke the Compile action by clicking on the compile toolbar button. Once compilation has finished the Results List should display 'Compilation Finished - 0 Error(s) 8 Warning(s)'. The number of warnings reported during compilation may vary on your system due to the way Interactive Logic has been configured. Now invoke the Download action by clicking the download toolbar button. After a short delay Interactive Logic will enter online mode.
  • Step 8: Monitoring and Forcing Data
To start the design invoke the Run action from the Build & Connect toolbar. The design is now operational and you can try forcing the buffers and entering data into the counter symbol. If you want to see the internals of the schematic or state diagram working, just select them on the Project Tree or double click their symbol.
  • Forcing a buffer - To force a buffer, click or double click inside the buffer's rectangle, a dialog will be displayed to allow you to choose what value you would like to force into the buffer. If the option 'Single click activation of online data' is disabled then a double click is required.
  • Changing an Integer value - To change the value of an integer click or double click on the integer (depending on the single click activation option noted above) and a dialog will appear where you may enter the new value.