/*
7k87k_di.c :Demo program for 7K and 87K DI module connected to COM port of uPAC-5000.
            Before running the demo, user must use DCON Utility to set Address, Baudrate and CheckSum.

Compiler: BC++ 3.1,
          Turbo C++ 1.01 (3.01)
          MSVC 1.52
          
Compile mode: large

Project: 7k87k_di.c
         ..\..\Lib\uPAC5000.lib

Hardware: uPAC-5000 <== COM port ==> 7K or 87K module 

[Dec 30, 2011] by Liam
*/

#include <stdio.h>
#include "..\..\lib\upac5000.h"

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

void main(void)
{
    int iAddress, iRet,iTotalChannel, iComPort, iCheckSum, iTimeout;
    unsigned char cTemp[8];
    unsigned long lValue;
    unsigned long lBaudrate;
    
    InitLib(); /* InitLib() must be called before other functions in the library may be used */
        
    Print("Please Input ComPort Number:");
    LineInput(cTemp, 8);
    sscanf(cTemp, "%d", &iComPort);  
        
    Print("Please Input ComPort's Baudrate:");
    LineInput(cTemp, 8);
    sscanf(cTemp, "%ld", &lBaudrate);
    
    Print("Please Select Checksum(0:Disable or 1:Enable):");
    LineInput(cTemp, 8);
    sscanf(cTemp, "%d", &iCheckSum);
    
    Print("Please Input module's address(0~255):");
    LineInput(cTemp, 8);
    sscanf(cTemp, "%d", &iAddress);
    
    Print("Please Input module's channel number(0~32):");
    LineInput(cTemp, 8);
    sscanf(cTemp, "%d", &iTotalChannel);
    
    Print("Please Input Timeout:");
    LineInput(cTemp, 8);
    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);
        }
    }
}

//=====================================================================
//====== 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]=='>') // a valid response is reveived
        {
            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; // an invalid response is reveived
        }
    }
    
    return iRet;
}