Re: [Xenomai-help] isr

[Jan Kiszka <jan.kiszka@domain.hid>]

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Keinen Namen wrote:
> Sorry here is my source code.
> 
> My Problem ist how can I call the ISR.

Well, the basic idea behind IRQs is that the hardware "call" them for
you, isn't it? :)

See /proc/xenomai/irq if something is happening on your IRQ line.

> 
> Regards Memory
> 
> 
> #include <linux/kernel.h>
> #include <linux/init.h>
> #include <linux/module.h>
> #include <linux/fs.h>
> 
> #include <native/intr.h>
> 
> MODULE_DESCRIPTION("My kernel module");
> MODULE_AUTHOR("Nobody");
> MODULE_DESCRIPTION("Dei Mudda");
> MODULE_LICENSE("my own");
> 
> 
> RT_INTR my_rt_intr;
> 
> int helloworld_isr(rt_intr_t *intr){
> 	printk( KERN_ALERT "IRQ\n");
> 	return IRQ_HANDLED;
> }
> 
> struct file_operations helloworld_fops = {
> 	.owner 		= THIS_MODULE,
> 	.llseek		= NULL,
> 	.read		= NULL,
> 	.write		= NULL,
> 	.readdir	= NULL,
> 	.poll		= NULL,
> 	.ioctl		= NULL,
> 	.mmap		= NULL,
> 	.open		= NULL,
> 	.flush		= NULL,
> 	.release	= NULL,
> 	.fsync		= NULL,
> 	.fasync		= NULL,
> 	.lock		= NULL,
> 	.readv		= NULL,
> 	.writev		= NULL,
> };

What's this for? Keep in mind that mixing Linux file operations with
Xenomai is almost always not cleanly working. That's also what RTDM is
for: providing a stripped down file operations interface to real-time users.

> 
> 
> static int helloworld_init_module(void) {
> 	int x;
> 	printk( KERN_ALERT "Module helloworld init startet Version 0.1\n" );
> 	x = rt_intr_create(&my_rt_intr,"ein Name",SIU_INT_TIMER2,&helloworld_isr,NULL,0);

Are you sure your hardware is already set up to fire on SIU_INT_TIMER2?

If you are looking for some working examples, check the new irqbench
test over RS232 or the timer-related part of Hannes' example driver on
http://www.captain.at/xenomai-real-time-driver-example-driver-source-code.php

What's your goal, BTW?

> 	if(!x){
> 		printk( KERN_ALERT "Interrupt erfolgreich erstellt\n");
> 		if(!(rt_intr_enable(&my_rt_intr))){
> 			printk( KERN_ALERT "Interrupt erfolgreich aktiviert\n");
> 		}
> 	}else{
> 		printk( KERN_ALERT "Interrupt Erstellung fehlgeschlagen %i\n",x);
> 	}
> }
> 
> static void helloworld_exit_module(void) {
> 
> 	if(!(rt_intr_disable(&my_rt_intr))){
> 		printk( KERN_ALERT "Interrupt Cleared !\n" );
> 		if(!(rt_intr_delete(&my_rt_intr))){
> 	 		printk(KERN_ALERT "Interrupt deleted\n" );
> 		}
> 	}
> 
> 	printk( KERN_ALERT "Module helloworld exit\n" );
> }
> 
> module_init(helloworld_init_module);
> module_exit(helloworld_exit_module);
> 
> -------- Original-Nachricht --------
> Datum: Mon, 10 Jul 2006 10:30:16 +0200
> Von: Jan Kiszka <jan.kiszka@domain.hid>
> An: Keinen Namen <GSM909@domain.hid>
> Betreff: Re: [Xenomai-help] isr
> 
>> Keinen Namen wrote:
>>> Hi I useing Xenomai 2.1 and the native skin 
>>>
>>> I want create a intr in kernel space with rt_intr_create, the 4th
>> argument is the pointer is the ISR.
>>> My Question is which form does the ISR must have
>>>
>>> rt_isr_t myisr ( ??? )
>>> {
>>> ...
>>> }
>>>
>> int my_isr(rt_intr_t *intr);
>>
>> That's indeed undocumented, you had to browse the code for this
>> information. :-/
>>
>> [Note: unless you are writing some specialised or experimental code,
>> developing drivers over the RTDM skin is recommended now. This aims at
>> unifying the device interfaces for all skins.]
>>
>> Jan
>>
> 



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