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9、瓿篿長销汨鑓扢鑜汓融蚁革晧扛盿豜瑛葥蝨葧汶销汨湨蝨葎腶屒镏蝨盿晨骉葛蚁革晧扛R屝呏蛿革晧扛鹙豛氀一奧螗肕!賛谐貼貎賾賟鲘鳪謐鳍!鸐!跸贐1餐!躺躋谐黈瀐腐瀀恠灐灰酰偠灠酰倀腰瀀灠恰酐瀐灰倰偐偠偐偐偐偐偐偐偐偐腐酰瀀灰倀偐恰恰腠偐瀀偐偐偐偐偐偐偐偐偐偐偐偐脐脀怐Page 1 of 11Blackfin Speedway Workshop Lab 3TCP/IP Using:Page 2 of 11Purpose:The purpose of this lab is to show the necessary steps in creating a TCP/IP based application
10、. In addition to implementing the TCP/IP stack, the user will also learn the steps necessary to create boot code, initialize the memory controller, and boot the board independent of the software tools. These lessons will be useful for when a designer creates their own board and at sometime wants to
11、create his/her own boot image. Page 3 of 11TCP/IP LwIP for ADSP-BF537 EZ-KIT LiteTMThis example uses the TCP/IP framework provided with VisualDSP+ for Ethernet applications to setup a pingable client-server application.The 1st phase of this project is to setup the hardware:STEPS:1) Plug the USB Debu
12、g Agent into the ADSP-BF537 EZ-KIT Lite board and into a free USB port on your PC. Plug in the included AC adapter and power on the board.2) Plug the supplied EIA/TIA 568-B.2 cross-over cable into the RJ45 ports of both the ADSP-BF537 EZ-KIT Lite and your PC.3) You must give your network card a spec
13、ific IP address for this lab to work. Go to “Start-Settings-Network Connections” and right-click on “Local Area Connection” and select “Disable” to shut down the connection and avoid your PC trying to continuously connect to the board before the application is loaded. Right-click again and select “P
14、roperties”. Select the “Internet Protocol (TCP/IP)” item and click Properties. Click “Use the following IP address” and enter the following:IP address: 192.168.0.3Subnet mask: 255.255.255.0Default gateway: 1.1.1.1Click OK to close the TCP/IP Properties window. Click Close to close the Local Area Con
15、nection Properties window.Now that the PC and EZ-KIT are properly configured, the 2nd phase is to create, build, and load the TCP/IP application via the USB Debug Agent to the BF537 EZ-KIT Lite.4) Launch VisualDSP+ using the desktop shortcut and open a “BF537 EZ-KIT Lite via Debug Agent” session. If
16、 there are any projects open in your active IDDE session, right-click the “Project Group” in your Project window on the left and select “Close All Projects”. Click Yes in response to any pop-up windows.5) Right-click the empty “Project Group” and select “Add New Project”Page 4 of 11This will invoke
17、the New Project Wizard. Give your project a name and use the “c:speedwayLab3” directory to save your newly created project. Under “Project types”, select “TCP/IP Stack application using LwIP and VDK”. Click Next-. In the pop-up, click Yes to create the directory.6) On the next screen, select the ADS
18、P-BF537 as your Processor type. Use the “Automatic” silicon revision. Leave the Project output type as “Executable file”. Click Next-.7) In the “Add Startup Code” phase, leave “No” selected and click Next-.8) The next step targets the ADDS-BF537 EZ-KIT Lite board. Click Next-.9) The final step summa
19、rizes your skeletal project. Click Finish and observe the Project being populated in your Project window on the left.The default TCP/IP libraries are built assuming a DHCP server is running on your network. Since this is a point-to-point application, the TCP/IP libraries must be built for a static I
20、P address.10) In VisualDSP+, use the “Settings-Preferences” pull-down and click on the Plugins selection on the left. Scroll the window down and make sure the “TCP/IP Configuration Manager” box is checked. Click OK.11) Use the “Settings-TCP/IP Configuration” pull-down and click the Network0 tab. Mak
21、e sure “Use DHCP” is not selected and fill in the first three fields as follows:IP address: 192.168.0.2Subnet mask: 255.255.255.0Default gateway: 1.1.1.1Note that these values are the same as the settings given in the initialization of your network card above, with the exception that the IP address
22、itself is 1 less than that given to the network card.12) Click the General tab. Under Protocols, select All and click the “Save and add to project” button. Give your file the name “speedway.tcp” and click Save. Note that the Configuration File field is populated with the file you just created. Click
23、 OK and note that a TCP/IP Configuration folder now appears in your Project window.13) Before a TCP/IP connection can be established, you must re-enable your PC network card. Return to your “Network Connections” and right-click on “Local Area Connection” and select “Enable”.Page 5 of 1114) Use F7 to
24、 build and load the project. Select Yes in the pop-up asking if youd like to save the files that have been modified. Press F5 to run the project and note three strings output to the Console window:Waiting for the link to be establishedLink establishedIP Address: 192.168.0.215) Open a command prompt
25、and type ping 192.168.0.2. You should see a 0% loss on the test packets sent in the ping operation.Now phase two is complete. Phase three is going to add some functionality to the client so that it has the ability to do something beyond responding to a ping.16)NOTE: While doing this step, Double-che
26、ck the spelling of the ThreadType name (Caesar_Cipher_ThreadType), as any misspelling will cause compilation errors and incorrect naming of all the skeleton code. As a result you will have numerous errors requiring several edits. From the Kernel tab of the VisualDSP+ Project window, navigate to “Ker
27、nelThreadsThread Types”. Right-click “Thread Types” and select “New Thread Type”. Type Caesar_Cipher_ThreadType in the Name field. Click OK. 17) Switch back to the Project tab, expand the Source Files sub-tree, and double-click Caesar_Cipher_ThreadType.cpp to open the file. Replace the method Caesar
28、_Cipher_ThreadType:Run() with this code (copy/paste):Note: For convenience, all the snippets below can be copy and pasted from the *.txt files found in c:speedwaylab3cut and paste fileslab3stepXX.txt For example, the code below is found in “c:speedwaylab3cut and paste fileslab3step17.txt”. Open the
29、file and copy/paste the information into the appropriate place in the project source file. Please be careful when cutting and pasting to ensure there is no “orphaned” text or braces. void Caesar_Cipher_ThreadType:Run() static char *pszWelcome = “Welcome to Blackfin. Type letters “A“ though “Z“ and I
30、 will encrypt them.xaxd“;if ( 0 = send ( m_iSocket, pszWelcome, strlen ( pszWelcome ), 0 ) ) return;while (1) int iCount;if (iCount= recv(m_iSocket, m_vInBuf, sizeof(m_vInBuf)/sizeof(char), 0) = 1 )Page 6 of 11int iCharNum;char c;for ( iCharNum = 0; iCharNum = A Page 7 of 11if(system_init() = -1) pr
31、intf(“Failed to initialize systemn“);return; start_stack(); /* start stack */memset(ip,0,sizeof(ip);if(gethostaddr(0,ip) printf(“IP ADDRESS: %sn“,ip); struct sockaddr_in saddr;int listenfd;if ( 0 ( listenfd = socket ( AF_INET, SOCK_STREAM, 0 ) ) ) printf ( “Call to socket() failed.n“ );abort(); memset ( saddr.sin
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