request_rtirq.3

rtlinux-3.1源代码

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.TH "request_RTirq(3)" "3" 
.SH "NAME" 
request_RTirq \(em install an interrupt handler 
.SH "SYNOPSIS" 
.PP 
.nf 
.ta 8n 16n 24n 32n 40n 48n 56n 64n 72n 
\fIWARNING\fP -  
This is an RTLinux v1.x compatibility function.   
For new programs, please see \fBrtl_request_irq(3)\fP. 
 
#define MODULE 
#include <linux/module.h> 
#include <linux/kernel.h> 
#include <linux/version.h> 
#include <linux/errno.h> 
#include <linux/rtf.h> 
#include <asm/rt_irq.h> 
 
int \fBrequest_RTirq\fP(unsigned int \fBirq\fR, void \fB(*handler)(void))\fP; 
.fi 
.SH "WARNING" 
.PP 
This is an RTLinux v1.x compatibility function.  
For new programs, please see \fBrtl_request_irq(3)\fP. 
.SH "DESCRIPTION" 
.PP 
\fBrequest_RTirq\fP installs \fBhandler\fR as an interrupt service routine for IRQ level \fBirq\fR.  \fBhandler\fR is then invoked whenever interrupt number \fBirq\fR occurs.  The interrupt service routine can be uninstalled using free_RTirq. 
.SH "RETURN VALUE" 
.PP 
On success, 0 is returned.  On failure, a negative value is returned as described below. 
.SH "ERRORS" 
.IP "-EINVAL" 10 
\fBirq\fR is not a valid IRQ number, or \fBhandler\fR is NULL. 
.IP "-EBUSY" 10 
\fBirq\fR already has a handler.  You must first call \fBfree_RTirq\fP to make the IRQ available. 
.SH "AUTHOR" 
.PP 
Jerry Epplin, modified by Michael Barabanov (\[e-mail] (link to URL mailto:[e-mail]) \fR) 
.SH "SEE ALSO" 
\fIfree_RTirq(3) (link to URL free_RTirq.3.html) \fR 
.PP 
\(co1997 Jerry Epplin. 
.PP 
Modifications for RTLinux 2.x and 3.x by Michael Barabanov. \(co2001 FSMLabs Inc. 
.PP 
All rights reserved. 
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