/*
7k87k_di.c :Demo program for 7K and 87K DI module connected to COM port of 7188/8000.
            User must use DCON Utility to set Address, Baudrate,CheckSum          
            before running the demo.        	                                 

Compiler: BC++ 3.1, 
          Turbo C ++ 1.01(3.01) (free from http://community.borland.com/museum)
          MSC 6.0,
          MSVC 1.52.
      
Compile mode: large

Project: 7k87k_di.c 
         ..\Lib\(8000E.Lib,7188XAL.Lib,7188XBL.Lib,7188XL.Lib or 7188EL.Lib) 

Hardware: 7188/8000 <== COM port ==> 7K or 87K modelue 

[24 May,2005] by Bill
[30,Jan,2007] by Liam
[July,13,2011] by Nicholas
*/

#include <stdio.h>
#include "..\..\lib\7188e.h"

int Read7K87K_DI(int iComPort,int iAddress,int iTotalChannel,int iCheckSum,int iTimeout,unsigned long *Value);

void main()
{
    int iAddress,iRet,iTotalChannel,iComPort,iCheckSum,iTimeout;
    
    unsigned char cTemp[10];
    unsigned long lValue;   
    unsigned long lBaudrate;
    
    InitLib();
        
    Print("/*****************************/\n\r"); 
    Print("/*  87K_DI demo for Com Port */\n\r"); 
    Print("/*                           */\n\r"); 
    Print("/*       [30,Jan,2007]       */\n\r");  
    Print("/*****************************/\n\r"); 
    Print("\n\r");                        
    
    Print("Please Input ComPort Number:");
    LineInput(cTemp,10);               
    sscanf(cTemp,"%d",&iComPort);  
        
    Print("Please Input ComPort's Baudrate:");
    LineInput(cTemp,10);
    sscanf(cTemp,"%ld",&lBaudrate);
    
    Print("Please Select Checksum(0:Disable or 1:Enable):");
    LineInput(cTemp,10);
    sscanf(cTemp,"%d",&iCheckSum);
    
    Print("Please Input module's address(0~255) =");
    LineInput(cTemp,10);
    sscanf(cTemp,"%d",&iAddress);
    
    Print("Please Input module's channel number(0~32) =");
    LineInput(cTemp,10);
    sscanf(cTemp,"%d",&iTotalChannel);
    
    Print("Please Input Timeout:");        
    LineInput(cTemp,10);               
    sscanf(cTemp,"%d",&iTimeout);      
    
    InstallCom(iComPort,lBaudrate,8,0,1);
    
//Begin to read DI
    for(;;)
    {    
        iRet=Read7K87K_DI(iComPort,iAddress,iTotalChannel,iCheckSum,iTimeout,&lValue);	
                
        if(iRet==NoError)
        {
            Print("DI data = %-8lX\n\r",lValue);        
        }  
        else
        {
            Print("DI receive response error. Error Code = %d\n\r",iRet);
        }  
    }
    RestoreCom(iComPort);
}                               

//=====================================================================
//====== Following functions are used to read 87K DI modules        ===
//====== You can copy the functions to your own program.            ===
//=====================================================================
int Read7K87K_DI(int iComPort,int iAddress,int iTotalChannel,int iCheckSum,int iTimeout,unsigned long *Value)
{
    /*
    DCON protocol to read DI value
    Send command: @AA
    valid Response: >(DI Data)
    
    iComPort: 1~8                   
    iAddress: 0 ~ 255               
    iCheckSum: 0=Disable or 1=Enable
    iTimeout: unit=ms
    *Value: pointer to record DI data
    */
    
    int iRet,iLenth;
    unsigned long lDIdata,lBit;
    unsigned char InBuf[20],OutBuf[10];
    
    sprintf(OutBuf,"@%02X",iAddress);
    SendCmdTo7000(iComPort,OutBuf,iCheckSum);                  
    iRet=ReceiveResponseFrom7000_ms(iComPort,InBuf,iTimeout,iCheckSum);     

    if(iRet==NoError)
    {
        if(InBuf[0] == '>')     //Valid response first character: >
        {
            if(iTotalChannel<=8)
            {
                sscanf(InBuf+1,"%lX",&lDIdata);
                lDIdata=lDIdata >> 8; 
                *Value=lDIdata;
		        
		    }
			else
			{
                sscanf(InBuf+1,"%lX",&lDIdata);
                *Value=lDIdata;			    
			}
			return NoError;
        }
        else    
        {
           return -1;           //Response string error.
        } 
    }      
    else   
        return iRet;
}