checkdevice.c File Reference

Fast IEC drive detection: Check if there is some device attached, and the bus is not blocked. More...

#include <wdm.h>
#include "cbm_driver.h"
#include "i_iec.h"

Go to the source code of this file.

Functions
NTSTATUS	cbmiec_check_device (IN PDEVICE_EXTENSION Pdx, OUT IEC_CHECKDEVICE *CheckDevice)
	Fast IEC drive detection.

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Detailed Description

Fast IEC drive detection: Check if there is some device attached, and the bus is not blocked.

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Author:

Spiro Trikaliotis

Version:

Id

checkdevice.c,v 1.4 2006/03/11 09:18:24 trikalio Exp

Authors:

Based on code from SC written by Joe Forster & Wolfgang Moser

Definition in file checkdevice.c.

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Function Documentation

NTSTATUS cbmiec_check_device (  IN PDEVICE_EXTENSION  Pdx, OUT IEC_CHECKDEVICE *  CheckDevice )

Fast IEC drive detection. This function has two purposes: First of all, it tries to find out if there are devices responding on the IEC bus. Secondly, it finds out if the bus is blocked by a device, for example, because the device is busy. Parameters: Pdx  Pointer to the device extension. CheckDevice,:  Pointer to a IEC_CHECKDEVICE variable which will contain the status of the bus: IEC_CHECKDEVICE_NODEVICE indicates that there is no device attached, IEC_CHECKDEVICE_BUSBUSY indicates that the bus is still busy, and IEC_CHECKDEVICE_BUSFREE indicates we are free to use the bus. Returns: If the routine succeeds, it returns STATUS_SUCCESS. Otherwise, it returns one of the error status values. Definition at line 50 of file checkdevice.c. References CBMIEC_GET, CBMIEC_RELEASE, cbmiec_schedule_timeout(), CBMIEC_SET, DBG_ASSERT, FUNC_ENTER, PP_ATN_OUT, PP_CLK_OUT, PP_DATA_IN, PP_DATA_OUT, and PP_RESET_OUT. Referenced by cbmiec_reset().

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