How to read character in Rx Buffer ?

//Search card begin, return 0x01 if card is present
	   do {

             UART_1_CmdReset();				// Reset Command Buffer
		
			   for (i=0;i<15;i++)	
				{
					UART_1_PutChar(0x01); // Send a character to UART TX port 
				}
				  Delay50uTimes(1);
				c = UART_1_cGetChar();
		 }while (c == 0);
     //Search card end, return 0x01 if card is present       
		 				
		if (c == 0x01)//check the card available
		{
		 LCD_clr_line(0);
		 LCD_clr_line(1);
		 LCD_1_Position(0,0);
		 LCD_1_PrCString("Card in ");

		 UART_1_CmdReset();				// Reset Command Buffer
		 //send AB 02 01 until get a valid response begin
		do {    
		   for (i=0;i<3;i++)	
				{
					UART_1_PutChar(sel_card[i]); // Send a character to UART TX port 
				}
		Delay50uTimes(1);
		//Waits for a valid character in UART RX and returns its value.
		byte_length = UART_1_cGetChar();
		
		 }while (byte_length == 0);		
		 //send AB 02 01 until get a valid response end		
				      
					  //Returns length of characters in the command buffer. This command returns the current command
					  //length, whether a command terminator has been received or not.
					  byte_length = UART_1_bCmdLength();
					 
                             LCD_1_PrHexByte(byte_length);
				 
                   for (i=0;i<byte_length;i++)
						{
							RxdataBuff[i] = UART_1_cGetChar();	// Get a character from UART RX data register 
                   		}