DE0_CV_User_Manual (1162586), страница 2
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It's free of installation, just copy the whole folder to your host computer and launch thecontrol panel by executing the “DE0CV_ControlPanel.exe”.Specific control circuits should be downloaded to your FPGA board before the control panel canrequest it to perform required tasks.
The program will call Quartus II tools to download the controlcircuit to the FPGA board through the USB-Blaster[USB-0] connection.To activate the Control Panel, perform the following steps:1.Make sure Quartus II 14.0 or a later version is installed successfully on your PC.2.Set the RUN/PROG switch to the RUN position.3. Connect the USB cable provided to the USB Blaster port, connect the 5V power supply, andturn the power switch ON.4. Start the executable DE0CV_ControlPanel.exe on the host computer. The Control Panel userinterface shown in Figure 2-1 will appear.5. The DE0CV_ControlPanel.sof bit stream is loaded automatically as soon as theDE0CV_ControlPanel.exe is launched.6.In case of a disconnect, click on CONNECT where the .sof will be re-loaded onto the board.DE0-CV User Manual8www.terasic.comJanuary 16, 2015Please note that the Control Panel will occupy the USB port until you close that port; you cannot use Quartus IIto download a configuration file into the FPGA until the USB port is closed.7.
The Control Panel is now ready to use; experience it by setting the ON/OFF status for someLEDs and observing the result on the DE0-CV board.Figure 2-1 The DE0-CV Control PanelThe concept of the DE0-CV Control Panel is illustrated in Figure 2-2. The “Control Circuit” thatperforms the control functions is implemented in the FPGA board. It communicates with theControl Panel window, which is active on the host computer, via the USB Blaster link. Thegraphical interface is used to send commands to the control circuit.
It handles all the requests andperforms data transfers between the computer and the DE0-CV board.DE0-CV User Manual9www.terasic.comJanuary 16, 2015Figure 2-2 The DE0-CV Control Panel conceptThe DE0-CV Control Panel can be used to light up LEDs, change the values displayed on the7-segment, monitor buttons/switches status, read/write the SDRAM Memory, output VGA colorpattern to VGA monitor, read SD Card specification information.
The feature of reading/writing aword or an entire file from/to the Memory allows the user to develop multimedia applicationswithout worrying about how to build a Memory Programmer.2. 2 Controlling the LEDs, 7-segment DisplaysA simple function of the Control Panel is to allow setting the values displayed on LEDs, 7-segmentdisplays.Choosing the LED tab leads to the window in Figure 2-3. Here, you can directly turn the LEDs onor off individually or by clicking “Light All” or “Unlight All”.DE0-CV User Manual10www.terasic.comJanuary 16, 2015Figure 2-3 Controlling LEDsChoosing the 7-SEG tab leads to the window shown in Figure 2-4.
From the window, directly usethe left-right arrows to control the 7-SEG patterns on the DE0-CV board which are updatedimmediately. Note that the dots of the 7-SEGs are not enabled on the DE0-CV board.Figure 2-4 Controlling 7-SEG displayDE0-CV User Manual11www.terasic.comJanuary 16, 2015The ability to set arbitrary values into simple display devices is not needed in typical designactivities. However, it gives users a simple mechanism for verifying that these devices arefunctioning correctly in case a malfunction is suspected.
Thus, it can be used for troubleshootingpurposes.2. 3 Switches and Push-buttonsChoosing the Switches tab leads to the window in Figure 2-5. The function is designed to monitorthe status of slide switches and push buttons in real time and show the status in a graphical userinterface. It can be used to verify the functionality of the slide switches and push-buttons.Figure 2-5 Monitoring switches and buttonsThe ability to check the status of push-button and slide switch is not needed in typical designactivities. However, it provides users a simple mechanism to verify if the buttons and switches arefunctioning correctly. Thus, it can be used for troubleshooting purposes.2.
4 SDRAM Controller and ProgrammerThe Control Panel can be used to write/read data to/from the SDRAM chips on the DE0-CV board.As shown below, we will describe how the SDRAM may be accessed; Click on the Memory tab andselect “SDRAM” to reach the window in Figure 2-6.DE0-CV User Manual12www.terasic.comJanuary 16, 2015Figure 2-6 Accessing the SDRAMA 16-bit word can be written into the SDRAM by entering the address of the desired location,specifying the data to be written, and pressing the Write button.
Contents of the location can be readby pressing the Read button. Figure 2-6 depicts the result of writing the hexadecimal value 06CAinto offset address 200, followed by reading the same location.The Sequential Write function of the Control Panel is used to write the contents of a file into theSDRAM as follows:1. Specify the starting address in the Address box.2. Specify the number of bytes to be written in the Length box. If the entire file is to be loaded,then a checkmark may be placed in the File Length box instead of giving the number of bytes.3. To initiate the writing process, click on the Write a File to Memory button.4.
When the Control Panel responds with the standard Windows dialog box asking for thesource file, specify the desired file location in the usual manner.The Control Panel also supports loading files with a .hex extension. Files with a .hex extension areASCII text files that specify memory values using ASCII characters to represent hexadecimalvalues. For example, a file containing the line0123456789ABCDEFDE0-CV User Manual13www.terasic.comJanuary 16, 2015defines eight 8-bit values: 01, 23, 45, 67, 89, AB, CD, EF. These values will be loadedconsecutively into the memory.The Sequential Read function is used to read the contents of the SDRAM and fill them into a file asfollows:1.
Specify the starting address in the Address box.2. Specify the number of bytes to be copied into the file in the Length box. If the entire contentsof the SDRAM are to be copied (which involves all 64 Mbytes), then place a checkmark in theEntire Memory box.3. Press Load Memory Content to a File button.4. When the Control Panel responds with the standard Windows dialog box asking for thedestination file, specify the desired file in the usual manner.2.
5 SD CardThe function is designed to read the identification and specification information of the SD Card.The 4-bit SD MODE is used to access the SD Card. This function can be used to verify thefunctionality of the SD Card Interface. Follow the steps below to perform the SD Card exercise:1. Choosing the SD Card tab leads to the window in Figure 2-7.2. Insert an SD Card to the DE0-CV board, and then press the Read button to read the SD Card.
TheSD Card’s identification, specification, and file format information will be displayed in the controlwindow.DE0-CV User Manual14www.terasic.comJanuary 16, 2015Figure 2-7 Reading the SD Card Identification and Specification2. 6 VGADE0-CV Control Panel provides VGA pattern function that allows users to output color pattern toLCD/CRT monitor using the DE0-CV board. Follow the steps below to generate the VGA patternfunction:Choosing the VGA tab leads to the window in Figure 2-8.Plug a D-sub cable to the VGA connector of the DE0-CV board and LCD /CRT monitor.The LCD/CRT monitor will display the same color pattern on the control panel window.Click the drop down menu shown in Figure 2-8 where you can output the selected patternindividually.DE0-CV User Manual15www.terasic.comJanuary 16, 2015Figure 2-8 Controlling VGA display under Control Panel2. 7 Overall Structure of the DE0-CV Control PanelThe DE0-CV Control Panel is based on a Nios II Qsys system instantiated in the Cyclone V FPGAwith software running on the on-chip memory.
The software part is implemented in C code; thehardware part is implemented in Verilog HDL code with Qsys builder. The source code is notavailable on the DE0-CV System CD.To run the Control Panel, users should follow the configuration setting according to Section 3.1.Figure 2-9 depicts the structure of the Control Panel. Each input/output device is controlled by theNios II Processor instantiated in the FPGA chip. The communication with the PC is done via theUSB Blaster link.
The Nios II interprets the commands sent from the PC and performs thecorresponding actions.DE0-CV User Manual16www.terasic.comJanuary 16, 2015Figure 2-9 The block diagram of the DE0-CV control panelDE0-CV User Manual17www.terasic.comJanuary 16, 2015Chapter 3Using the Starter KitThis chapter provides an instruction to use the board and describes the peripherals.3.
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