Re: [Xenomai] Xenomai 3.0-rc3 Interruption on Arietta G25 (AT91SAM9G25 chip)

[Tianchi Huang <gz.eddie.htc@gmail.com>]

Thank you for your response, Gilles.

I added irq_request in the init function and an other callback handler.
Interruptions have been handled in the new handler, but not the elder. And
there was always the same problem with the counter in /proc/xenomai/irq, it
doesn't increase.

*Tianchi HUANG*

Ingénieur Informatique en Apprentissage

eddie.huang@bioserenity.com

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2015-03-23 23:09 GMT+01:00 Gilles Chanteperdrix <
gilles.chanteperdrix@xenomai.org>:

> On Mon, Mar 23, 2015 at 12:07:43PM +0100, Tianchi Huang wrote:
> > *Hello,*
> >
> > *I'm now working on project using Arietta G25 board (AT91SAM9G25 chip) on
> > which i need to capture 1000 interruptions per second of an external
> ADC. *
> > *I have patched the kernel 3.14.17 with the patch
> ipipe-core-3.14.17-arm-5
> > which i found on GNA. The compilation passed and Xenomai seems to run all
> > right. The latency test gave me about 100us as worst value. *
> >
> > *I make un modele of interruption test as below*
> > #include <linux/fs.h>
> > #include <linux/fcntl.h>
> > #include <linux/gpio.h>
> > #include <linux/interrupt.h>
> > #include <linux/module.h>
> > #include <rtdm/driver.h>
> >
> > #define GPIO_IN  27
> > static rtdm_irq_t irq_rtdm;
> > static int handler_interruption(rtdm_irq_t * irq){
> > printk(KERN_ALERT "IRQ received!\n");
> > return RTDM_IRQ_HANDLED;
> > }
> >
> > static int __init exemple_init (void){
> > int err;
> > int num_interruption;
> > if ((err = gpio_request(GPIO_IN, "test_irq")) != 0) {
> > return err;
> > }
> > if ((err = gpio_direction_input(GPIO_IN)) != 0) {
> > gpio_free(GPIO_IN);
> > return err;
> > }
> > numero_interruption = gpio_to_irq(GPIO_IN);
> > irq_set_irq_type(numero_interruption, IRQF_TRIGGER_FALLING);
> > if ((err = rtdm_irq_request(& irq_rtdm, num_interruption,
> > handler_interruption, RTDM_IRQTYPE_EDGE, "test_irq", NULL)) != 0) {
> > gpio_free(GPIO_IN);
> > return err;
> > }
> > printk(KERN_ALERT "Driver registed\n");
> > rtdm_irq_enable(& irq_rtdm);
> > return 0;
> > }
> >
> > static void __exit exemple_exit (void){
> > rtdm_irq_disable(& irq_rtdm);
> > rtdm_irq_free(&irq_rtdm);
> > gpio_free(GPIO_IN);
> > }
> > module_init(exemple_init);
> > module_exit(exemple_exit);
> > MODULE_LICENSE("GPL");
> >
> >
> > *It seems that it has been registed and run without no error, as you can
> > see just here:*
> > root@arietta:/home# cat /proc/xenomai/irq
> >   IRQ         CPU0
> >    17:           1         [timer/0]
> >    28:           0         test_irq
> >  1027:           0         [virtual]
> > root@arietta:/home# cat /proc/interrupts
> >            CPU0
> >  16:      31031       AIC   1  at91_tick, at91_rtc, ttyS0
> >  18:       1579       AIC  20  at_hdmac
> >  19:          0       AIC  21  at_hdmac
> >  23:      15338       AIC  12  f0008000.mmc
> >  25:          0       AIC  14  f0004000.spi
> >  26:      20732       AIC  23  atmel_usba_udc
> >  27:       8119       AIC  22  ehci_hcd:usb1, ohci_hcd:usb2
> >  28:          1      GPIO  27
> > Err:          0
> >
> > *But, when i generate a signal on GPIO 27, i can see the counter of
> > /proc/interrupts increase but not the counter of /proc/xenomai/irq nor
> the
> > message i put in the interrupt handler, as you can see below:*
> >
> > root@arietta:/home# cat /proc/xenomai/irq
> >   IRQ         CPU0
> >    17:           1         [timer/0]
> >    28:           0         test_irq
> >  1027:           0         [virtual]
> > root@arietta:/home# cat /proc/interrupts
> >            CPU0
> >  16:      31031       AIC   1  at91_tick, at91_rtc, ttyS0
> >  18:       1579       AIC  20  at_hdmac
> >  19:          0       AIC  21  at_hdmac
> >  23:      15338       AIC  12  f0008000.mmc
> >  25:          0       AIC  14  f0004000.spi
> >  26:      20732       AIC  23  atmel_usba_udc
> >  27:       8119       AIC  22  ehci_hcd:usb1, ohci_hcd:usb2
> >  28:       5459      GPIO  27
> > Err:          0
> >
> > *Do you have any idea of that? I've tried Xenomai 2.6.4 too, but i had
> the
> > same problem. Hope you can help me with this.*
>
> Have you tried calling both rtdm_irq_request and request_irq in the
> same driver ?
>
> --
>                                             Gilles.
>