libnodaveTest

#define BCCWIN
#include <stdio.h>
#include <stdlib.h>
#include "nodave.h"
#include "openS7online.h"
/*
dont forget to set the correct path (to the library libnodave.lib for the linker
and the header files for the compiler) in your IDE when using this code
*/
int main(int argc, char ** argv)
{
    char buf1 [davePartnerListSize];
    unsigned char * buffer;
    unsigned char * buffer2;
    int j,i, a, initSuccess,
    res;
    daveInterface * di;
    daveInterface * di2;
    daveConnection * dc;
    daveConnection * dc2;
    _daveOSserialType fds;

    //import the s7online.dll and set the handle
    fds.rfd=openS7online("S7Online",0);
    fds.wfd=fds.rfd;
    initSuccess=0;

    /*buffer for reading/writing to the PLC, increase on demand but keep in mind
      that the maximum size of a block in S7-Communication is limited by the size
      of a message structure calledPDU. Each call to daveReadBytes causes a the
      exchange of a request and a response PDU. The result data must fit into the
      "payload" area of a response PDU. This means a maximum block length is PDU
      size -18 bytes for read. A typical PDU size is 240 Byte, limiting read calls
      to 222 byte result length. If you need more data, you need to use multiple calls
      to daveReadBytes().
    */
    buffer=(unsigned char*)malloc(64);
    buffer2=(unsigned char*)malloc(64);

    if (fds.rfd>=0)
    {   //initialize the Interface
        di =daveNewInterface(fds, "IF1", 0, daveProtoS7online, daveSpeed187k);
        daveSetTimeout(di,5000000);
        for (i=0; i<3; i++)
        {
            if (0==daveInitAdapter(di))
            {
                initSuccess=1;
                break;
            }
            else daveDisconnectAdapter(di);
        }
        if (!initSuccess)
        {
            printf("Couldn't connect to Adapter!.\n Please try again. You may also try the option -2 for some adapters.\n");
            return -3;
        }
        //for debug purposes, list all available devices on the MPI bus
        a= daveListReachablePartners(di,buf1);
        printf("daveListReachablePartners List length: %d\n",a);

        if (a>0) {
            for (j=0;j<a;j++) {
            if (buf1[j]==daveMPIReachable) printf("Active device at address:%d\n",j);
            if (buf1[j]==daveMPIPassive) printf("Passive device at address:%d\n",j);
            }
        }


        //if interface was successfully initialized, create a connection to it
        dc =daveNewConnection(di, 7, 0, 0);
        dc2 =daveNewConnection(di, 6, 0, 0);



        printf("\nConnectPLC\n");
        daveConnectPLC(dc);
        //res=daveReadBytes(dc, daveDB, 120, 8, 2,buffer);
            res=daveReadBytes(dc,daveInputs,0,0,2,buffer);
            printf("%x\n", res);
            a=daveGetU16from(buffer);

            //statuscode res==0 = read successful
            if (res==0)
            {

                printf("PLC (GetU16 value): %x\n", a);
            }
            else
                printf("error %d=%s\n", res, daveStrerror(res));


            daveFree(dc);

        printf("\nConnectPLC2\n");
        if (0==daveConnectPLC(dc2))
        {
            res=0;
            a=0;
            //res=daveReadBytes(dc, daveDB, 120, 8, 2,buffer);
            res=daveReadBytes(dc2,daveInputs,0,0,2,buffer2);
            printf("%x\n", res);
            a=daveGetU16from(buffer2);

            //statuscode res==0 = read successful
            if (res==0)
            {

                printf("PLC (GetU16 value): %x\n", a);
            }
            else
                printf("error %d=%s\n", res, daveStrerror(res));

            //a=0x0600;
           // daveWriteBytes(dc, daveFlags,120,150,2,&a);

            free(buffer);
            daveDisconnectAdapter(di);
            daveFree(di);
            return 0;
        }
        else
        {
            printf("Couldn't connect to PLC.\n Please try again. You may also try the option -2 for some adapters.\n");
            daveDisconnectAdapter(di);
            daveDisconnectAdapter(di);
            daveDisconnectAdapter(di);
            return -2;
        }
    }
    else
    {
        printf("Couldn't open access point %s\n",argv[1]);
        return -1;
    }

}