main.cpp

00001 #include "mbed.h"
00002 #include "EthernetInterface.h"
00003 #include "Settimino.h"
00004 
00005 // PLC INFO
00006 const char* PLC = "10.0.10.51";
00007 const int RACK = 0;
00008 const int SLOT = 2;
00009 const int DB = 21;
00010 const int TOT_DATA = 10;
00011 const int OFFSET = 0;
00012 
00013 int main()
00014 {
00015     EthernetInterface eth; // Ethernet interface for connection
00016     S7Client client; // Snap7 client
00017     Serial serial(USBTX, USBRX); // USB serial port
00018     
00019     // Check EthernetInferface library handbook for details
00020     serial.printf("Connect to network...\r\n");
00021     eth.init(); //Use DHCP
00022     eth.connect();
00023     serial.printf("Connected: IP Address is %s\r\n", eth.getIPAddress());
00024     wait(2);
00025     
00026     serial.printf("Connecto to PLC at %s...\r\n", PLC);
00027     while(!client.Connected)
00028     {
00029         if(client.ConnectTo(PLC, RACK, SLOT))
00030             wait_ms(500);
00031     }
00032     serial.printf("Connected: PDU Length = %d\r\n", client.GetPDULength());
00033     wait(2);
00034     
00035     char buffer[32];
00036     int result;
00037     serial.printf("Read %d bytes from DB%d, starting at %d...\r\n", TOT_DATA, DB, OFFSET);
00038     result = client.ReadArea(S7AreaDB,  // Area type
00039                              DB,        // DB address
00040                              OFFSET,    // Byte offset
00041                              TOT_DATA,  // Tot bytes to read
00042                              buffer);   // buffer that will store read data
00043     if(result != 0)
00044     {
00045         serial.printf("ERROR %d\r\n", result);
00046     }
00047     else
00048     {
00049         serial.printf("Read data:\r\n");
00050         for(uint16_t i = 0; i < TOT_DATA; i++)
00051             serial.printf("%c", buffer[i]);
00052         serial.printf("\r\n");
00053     }
00054     wait(2);
00055     
00056     serial.printf("Disconnect from PLC...\r\n");
00057     client.Disconnect();
00058     
00059     serial.printf("Disconnect from network...\r\n");
00060     eth.disconnect();
00061     
00062     serial.printf("\r\n-- Test terminated --\r\n\r\n");
00063     
00064     while(1) {}
00065 }