Brp_Open_Serial_Session - Siemens SIMATIC RF1000 Operating Instructions Manual

Note that all the following functions, when operating via the USB interface, can
only be performed once a connection to the reader has been established with the
"brp_open_usb_session" function. If this is not the case, an error is signaled back.
Note
Parallel operation not possible
Note that with the application, a connection can only be established to one reader at any one
time. For this reason "brp_open_usb_session" may only be called once and before it can be called
again must first be closed by the function "brp_close_session".
After a "brp_open_usb_session", the parameter "Handle" must always be = "0". If the parameter
≠ "0", there is either an error or the function "brp_open__usb_session" was called several times
in succession.
Function call
int
brp_open_usb_session(
int * Handle,
DWORD ProductID
);
Table 7-1
Parameter
brp_open_usb_session
Return value
7.2.1.2

brp_open_serial_session

The function opens a connection to the reader via the RS232 interface and returns a session key
that is required for all functions and continued communication via this connection. If the
connection was successfully established, the value "BRP_OK" is returned.
SIMATIC RF1000
Operating Instructions, 05/2023, C79000-G8976-C432-10
Description of the parameters
Description
This function call opens a connection to the reader via the USB interface.
Handle Session key initialized by this function. The session key is valid as soon as
"BRP_OK" is returned.
ProductID 0x00
• BRP_OK
• BRP_ERR_BUSY
• BRP_ERR_GENERAL_IO
• BRP_ERR_BUFFER_OVERFLOW
• BRP_ERR_NO_MORE_HANDLES
• BRP_ERR_INSUFFICIENT_MEM
You will find more information on return values in the section "Return values
(Page 52)".
7.2 Programming via USB/RS232 interface (using DLL functions)
Programming
35