Read status of FT245RL pins

[mackowiakp <mackowiakp@xxxxx>]

Sorry for my ignorance but I am very new in FTDI chip software development.
I have module based on FT245RL chip, programmed to be 4 port output (relays)
and 4 port opto isolated input unit.
I found out in Internet program in C to turn on/off relays connected to
outputs D0 to D3. After compiling it works properly. Below draft of this
working program:

    /* switch4.c
     * # gcc -o switch4 switch4.c -L. -lftd2xx -Wl,-rpath,/usr/local/lib
     * Usage
     * # switch4 [0-15], for example # switch4 1
     * */
    
    #include <stdio.h>
    #include <stdlib.h>
    #include "./ftd2xx.h"

    int main(int argc, char *argv[])
    {
            FT_STATUS ftStatus;
            FT_HANDLE ftHandle0;
            int parametr;
            LPVOID pkod; 
            DWORD   nBufferSize = 0x0001;
            DWORD dwBytesWritten;

              if(argc > 1) {
                      sscanf(argv[1], "%d", &parametr);
              }
              else {
                      parametr = 0;
              }  

              FT_SetVIDPID(0x5555,0x0001);  // id z lsusb
              FT_Open(0,&ftHandle0);
              FT_SetBitMode(ftHandle0,15,1);

             pkod=&parametr;

             ftStatus = FT_Write(ftHandle0,pkod,nBufferSize,&dwBytesWritten);
             ftStatus = FT_Close(ftHandle0);
    }

My question is. How can I read status of D4 to D7 pins, programmed as
inputs? I mean about "printf" to stdout the number representing status (zero
or one) of input pins (or all input/output pins).
Can anybody help newbie ? 




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