// filename: mainSamp.cpp
// The code shown below is ready for compilation. Just create a .cpp and .h file, copy the code below into those files, compile it in your IDE, and run it. 
//     There is also ready to test sample application containing the following code downloadable from our  website .
// Demonstrates non-scan mode usage. Note the use of   "EX_GetOneConversion( )"  which is the function call into the DLL used to get a single voltage 
//     when not in scanning mode. If you've just started the application, the very first call to this and other I/O functions will first perform a signon of the device. 
//     The signon establishes serial communication and sets some   default configuration   parameters. 
// In order to get the voltage from the correct channel, you may also need to call  "EX_SetPolledModeChan( )".  The arguments that are passed are the main 
//     channel as well as the sub-channel. The sub channel is also often referred to as the external "control code" since it can be used to "control" a  multiplexer .
// Also shown here is how to send and read the digital input value using   "EX_SendDigout( )"  and  "EX_GetDigin( )".  


 #include <windows.h>
 #include <stdlib.h>  
 #include <wtypes.h>
 #include <conio.h>
 #include <stdio.h> 
 #include "mainSamp.h" 


BOOLEAN InitLibFuncs()
{
    hLib201 = LoadLibrary ("M201_SP.dll");
    if( !hLib201 ) return FALSE;

    EX_SendDigout = (P_DLL_EX_SendDigout)GetProcAddress( hLib201, "EX_SendDigout" );
    if( !EX_SendDigout ) return FALSE;

    EX_GetDigin = (P_DLL_EX_GetDigin)GetProcAddress( hLib201, "EX_GetDigin" );
    if( !EX_GetDigin ) return FALSE;

    EX_SendChan = (P_DLL_EX_SetPolledModeChan)GetProcAddress( hLib201, "EX_SetPolledModeChan" );
    if( !EX_SetPolledModeChan ) return FALSE;

    EX_GetOneConversion = (P_DLL_EX_GetOneConversion)GetProcAddress( hLib201, "EX_GetOneConversion" );
    if( !EX_GetOneConversion ) return FALSE;

    return TRUE;
}


NOTE:  Although there are many lines of code below, most of them are required for nothing more than managing the console display

int __cdecl main()
{
    if( !InitLibFuncs() ){ printf("Failed to find load required DLL and/or find required functions" ); getch(); return 0;}
    printf("Success finding required functions\nStarting RUN -  please wait. . .");

    int iKeyChar = 0; char szOutVal[32], szTempBuff[32]; BYTE bDigInput; double dblMilliVolts;  

    BOOLEAN fRedraw = FALSE; char cUserInputVal;
    while(true)
    {
        printf("\n\nINITIALIZED\nPress one of the following keys:\n"
            "'Q' exit\n"
            "'R' redraw the screen\n"
            "'G' get digital input\n"
            "'S' send digital output (follow by value 255 or less)\n"
            "'V' get one voltage - it will come from preconfigured channel\n"
            "'C' set the channel\n");

        while((cUserInputVal != 'Q') && (cUserInputVal != 'q') && (cUserInputVal != 27))
        {
            cUserInputVal = (char)getch();
            switch(cUserInputVal)
       	    {
            	case 'Q': case 'q':
            	    fRedraw = TRUE; system("cls"); break;

            	case 'R': case 'r':
            	    break;

            	case 'G': case 'g':
            	    if(!EX_GetDigin(&bDigInput)) printf("\nfailed to get digital input\n"); 
            	    else(printf("\ndigital input: %d\n", bDigInput)); break;

            	case 'V': case 'v':
            	    if(!EX_GetOneConversion(&dblMilliVolts)) printf("\nfailed to get voltage\n"); 
            	    else(printf("\nvoltaget: %2.5lf", dblMilliVolts / 1000.0)); break;

            	case 'S': case 's':
            	    sprintf(szOutVal, ""); printf("\nenter value: ");
            	    while(TRUE)
            	    {
            	        iKeyChar = getche(); if(iKeyChar == 13) break;
            	        sprintf(szTempBuff, "%u", ((BYTE)iKeyChar) - '0');
            	        strcat(szOutVal, szTempBuff); if(strlen(szOutVal) == 3) break;
            	    }
				
            	    if(((UINT)(atoi(szOutVal))) > 255)
            	    { printf("\nvalue entered greater than 255. New value: 255"); sprintf(szOutVal, "255"); }
				
            	    if(!EX_SendDigout((BYTE)(atoi(szOutVal)))) printf("\nfailed to send digital input\n"); 
            	    else printf("\ndigital output sent: %d\n", (BYTE)(atoi(szOutVal)));
            	    sprintf(szOutVal, ""); break;

            	case 'C': case 'c':
            	    sprintf(szOutVal, ""); printf("\nenter channel: ");
            	    while(TRUE)
            	    {
            	        iKeyChar = getche(); if(iKeyChar == 13) break;
            	        sprintf(szTempBuff, "%u", ((BYTE)iKeyChar) - '0');
            	        strcat(szOutVal, szTempBuff); if(strlen(szOutVal) == 1) break;
            	    }
				
            	    if(((UINT)(atoi(szOutVal))) > 15)
            	    { printf("\nvalue entered greater than 15. New value: 7"); sprintf(szOutVal, "7"); }
				
            	    if(!EX_SetPolledModeChan((BYTE)(atoi(szOutVal)))) printf("\nfailed to send channel\n"); 
            	    else printf("\nchannel sent: %d\n", (BYTE)(atoi(szOutVal)));
            	    sprintf(szOutVal, ""); break;
            }
    	}
        if(!fRedraw) break;
    }
    return 1;
}

//filename: mainSamp.h

typedef BOOLEAN(*P_DLL_EX_InitDev) (void);
P_DLL_EX_InitDev EX_InitDev = NULL;

typedef BOOLEAN(*P_DLL_EX_SendDigout) (BYTE bDigOut);
P_DLL_EX_SendDigout EX_SendDigout = NULL;

typedef BOOLEAN(*P_DLL_EX_GetDigin) (BYTE* bDigIn);
P_DLL_EX_GetDigin EX_GetDigin = NULL;

typedef BOOLEAN(*P_DLL_EX_SetPolledModeChan) (BYTE bPolledChan);
P_DLL_EX_SetPolledModeChan EX_SetPolledModeChan = NULL;

typedef BOOLEAN(*P_DLL_EX_GetOneConversion) (double* dblVolts);
P_DLL_EX_GetOneConversion EX_GetOneConversion = NULL;