#Parallel port driver

The IOCTL_PAR_IS_PORT_FREE request determines if a parallel device's parent parallel port is free at the time the system-supplied bus driver for parallel ports processes the request. The IOCTL_PAR_GET_DEVICE_CAPS request does the following The IOCTL_PAR_GET_DEFAULT_MODES request returns the default write (forward) and read (reverse) IEEE 1284 protocols that the system-supplied bus driver for parallel ports uses. The IOCTL_INTERNAL_UNLOCK_PORT_NO_DESELECT request frees a parallel device's parent parallel port. IOCTL_INTERNAL_UNLOCK_PORT_NO_DESELECT IOCTL The IOCTL_INTERNAL_UNLOCK_PORT request deselects a parallel device and frees the parallel device's parent parallel port. The IOCTL_INTERNAL_RELEASE_PARALLEL_PORT_INFO request returns STATUS_SUCCESS. IOCTL_INTERNAL_RELEASE_PARALLEL_PORT_INFO IOCTL The IOCTL_INTERNAL_PARCLASS_DISCONNECT request disconnects a client from a parallel device. The IOCTL_INTERNAL_PARCLASS_CONNECT request returns information about a parallel port and the callback routines that the system-supplied bus driver for parallel ports provides to operate the parallel port. The IOCTL_INTERNAL_PARALLEL_SET_CHIP_MODE request sets the operating mode of a parallel port. IOCTL_INTERNAL_PARALLEL_SET_CHIP_MODE IOCTL The IOCTL_INTERNAL_PARALLEL_PORT_FREE request frees a parallel port. The IOCTL_INTERNAL_PARALLEL_PORT_ALLOCATE request allocates a parallel port for exclusive access by a client. IOCTL_INTERNAL_PARALLEL_PORT_ALLOCATE IOCTL The IOCTL_INTERNAL_PARALLEL_DISCONNECT_INTERRUPT request disconnects an interrupt service routine (and an optional deferred port check service routine) that was connected by using an IOCTL_INTERNAL_PARALLEL_CONNECT_INTERRUPT request. IOCTL_INTERNAL_PARALLEL_DISCONNECT_INTERRUPT IOCTL The IOCTL_INTERNAL_PARALLEL_CONNECT_INTERRUPT request connects an optional interrupt service routine and an optional deferred port check routine to a parallel port. IOCTL_INTERNAL_PARALLEL_CONNECT_INTERRUPT IOCTL The IOCTL_INTERNAL_PARALLEL_CLEAR_CHIP_MODE request clears the operating mode of a parallel port.

IOCTL_INTERNAL_PARALLEL_CLEAR_CHIP_MODE IOCTL The IOCTL_INTERNAL_LOCK_PORT_NO_SELECT request allocates the parallel device's parent parallel port, but does not select the parallel device. The IOCTL_INTERNAL_LOCK_PORT request allocates the parallel device's parent parallel port and selects the parallel device on the port. The IOCTL_INTERNAL_INIT_1284_3_BUS request initializes and assigns an IEEE 1284.3 device ID to all the 1284.3 daisy chain devices that are attached to a parallel port. The IOCTL_INTERNAL_GET_PARALLEL_PORT_INFO request returns information about a parallel port. IOCTL_INTERNAL_GET_PARALLEL_PORT_INFO IOCTL The IOCTL_INTERNAL_GET_PARALLEL_PNP_INFO request returns Plug and Play information about a parallel port. IOCTL_INTERNAL_GET_PARALLEL_PNP_INFO IOCTL The IOCTL_INTERNAL_GET_MORE_PARALLEL_PORT_INFO request returns information about a parallel port. IOCTL_INTERNAL_GET_MORE_PARALLEL_PORT_INFO IOCTL The IOCTL_INTERNAL_DISCONNECT_IDLE request disconnects the IEEE 1284 operating modes that are set for a parallel device. The IOCTL_INTERNAL_DESELECT_DEVICE request deselects an IEEE 1284.3 daisy-chain device or an IEEE 1284 end-of-chain device attached to a parallel port. The IOCTL_IEEE1284_NEGOTIATE request sets the read and write protocols that are used for a parallel device. The IOCTL_IEEE1284_GET_MODE request returns the IEEE 1284 read and write protocols that are currently set for a parallel device.

To develop Parallel Ports, you need these headers:įor the programming guide, see Parallel Ports. Overview of the Parallel Ports technology.

Parallel port