opencbm: unlisten.c Source File

00001 /*
00002  *  This program is free software; you can redistribute it and/or
00003  *  modify it under the terms of the GNU General Public License
00004  *  as published by the Free Software Foundation; either version
00005  *  2 of the License, or (at your option) any later version.
00006  *
00007  *  Copyright 1999-2004 Michael Klein <michael(dot)klein(at)puffin(dot)lb(dot)shuttle(dot)de>
00008  *  Copyright 2001-2004 Spiro Trikaliotis
00009  *
00010  */
00011 
00023 #include <wdm.h>
00024 #include "cbm_driver.h"
00025 #include "i_iec.h"
00026 
00038 NTSTATUS
00039 cbmiec_unlisten(IN PDEVICE_EXTENSION Pdx)
00040 {
00041     NTSTATUS ntStatus;
00042     ULONG sent;
00043     UCHAR buffer;
00044 
00045     FUNC_ENTER();
00046 
00047     // send a 0x3F (untalk) under control of ATN
00048 
00049     buffer = 0x3f;
00050     ntStatus = cbmiec_i_raw_write(Pdx, &buffer, 1, &sent, 1, 0);
00051 
00052     Pdx->DoNotReleaseBus = FALSE;
00053 
00054     FUNC_LEAVE_NTSTATUS(ntStatus);
00055 }