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7-32 Lucent Technologies Inc.
USS-720 Preliminary User Guide, Rev. 2
USB Device Driver February 1999
13
5 I/O Control Data Structures (continued)
5.3 REGISTER_1284
The REGISTER_1284 structure is used when issuing the IOCTL_GET_1284_REGISTER control code.
5.3.1 Data Structure
typedef struct _REGISTER_1284
{
UCHAR RegisterAddress;
UCHAR DataRegister;
UCHAR StatusRegister;
UCHAR ControlRegister;
UCHAR EppAddressRegister;
UCHAR EppDataRegister;
UCHAR EcpCommandRegister;
UCHAR ExtendedControlRegister;
UCHAR USS720ControlRegister
}
REGISTER_1284, *PREGISTER_1284;
5.3.2 Members
RegisterIndex—Address of the parallel port register.
DataRegister—Data Register value (see Data Register table in Lucent Technologies
USS-720 USB-to-
IEEE
1284
Bridge
Preliminary Data Sheet for details).
StatusRegister—Status Register value (see Status Register table in Lucent Technologies
USS-720 USB-to-
IEEE
1284 Bridge
Preliminary Data Sheet for details).
ControlRegister—Control Register value (see Control Register table in Lucent Technologies
USS-720 USB-to-
IEEE
1284 Bridge
Preliminary Data Sheet for details).
EppAddressRegister—EPP Address Register value (see EPP Address Register table in Lucent Technologies
USS-720 USB-to-
IEEE
1284 Bridge
Preliminary Data Sheet for details).
EppDataRegister—EPP Data Register value (see EPP Data Register table in Lucent Technologies
USS-720 USB-
to-
IEEE
1284 Bridge
Preliminary Data Sheet for details).
EcpCommandRegister—ECP Command Register value (see ECP Command Register table in Lucent Technolo-
gies
USS-720 USB-to-
IEEE
1284 Bridge
Preliminary Data Sheet for details).
ExtendedControlRegister—Extended Control Register value (see Extended Control Register table in Lucent Tech-
nologies
USS-720 USB-to-
IEEE
1284 Bridge
Preliminary Data Sheet for details).
USS720ControlRegister—USS-720 Control Register value (see USS-720 Control Register table in Lucent Tech-
nologies
USS-720 USB-to-
IEEE
1284 Bridge
Preliminary Data Sheet for details).