Please help with serial communication

[Allen Yang]

Hi,
I tried to get some data from PC. And my code just won't work. anyone can
help me with it?

static void do_channel()
{
        Err serror;
//      unsigned int x;
        unsigned char COMM_REQUEST;
        unsigned char SAMPLE_READY_FLAG;
        UInt temp = 0;
        
            for (temp = 0; temp<2; temp++)
         {
    
                if (temp == 0) {
                        Get_Buffer_Data(1,25,x); // this is the function for
getting data
                        SAMPLE_READY_FLAG = 0;
                        SerReceiveFlush(serial_lib,0);
                }
                else
                    Get_Buffer_Data(1,25,x);
                  
        }       
}

static Boolean Get_Buffer_Data (unsigned char buffer_num,unsigned int
num_bytes , void * buf )
{
        Err serror;
        unsigned char buffer_sent;
        char* bufchar;
        num_bytes = 25;s
        
        
 
  SerReceive(serial_lib,buf,num_bytes,SERIAL_TIMEOUT,&serror);
  SAMPLE_READY_FLAG = 1;
 
  bufchar=buf;
    
  StrPrintF(reading_buf,bufchar);
  fieldptr_ldu_ch3v = FrmGetObjectPtr(FrmGetActiveForm(),
FrmGetObjectIndex(FrmGetActiveForm(), fieldID_ldu_ch3v));
  FldSetTextPtr(fieldptr_ldu_ch3v, reading_buf);
  FldRecalculateField(fieldptr_ldu_ch3v, true);
    
    return 1;
}

I really don't know what is wrong with my code, and what is the problem ?

Please help me out.

Thanks ad advance.

Allen