On 2015-11-09 13:11, Federico Garcia Cruz wrote:
Hi everyone,
I'm using the GPIO api for the BBB but I'm having problems with the
interrupt handling.
I'm blinking two leds in the main thread and I have a GPIO input with
an interrupt attached that uses printk to print a message. The problem
is that the interrupt handler prints the message but never returns
(main thread leds stop blinking after that).
Any suggestion?
Here's my code:
rtems_gpio_irq_state gpio_handler(void* /*arg*/)
{
printk("interrupt handler\n");
return IRQ_HANDLED;
}
A return statement inside an interrupt handler?? Where does it return
back to?
- Sudarshan
void* POSIX_Init(void*)
{
rtems_mode previous_mode_set;
rtems_task_mode(RTEMS_TIMESLICE | RTEMS_PREEMPT,
RTEMS_TIMESLICE_MASK | RTEMS_PREEMPT_MASK, &previous_mode_set);
rtems_status_code sc = rtems_gpio_initialize();
printk("%d\n", sc);
sc = rtems_gpio_request_pin(BBB_LED_USR0, DIGITAL_OUTPUT, true,
false, NULL);
printk("DIGITAL_OUTPUT: %d\n", sc);
sc = rtems_gpio_request_pin(BBB_LED_USR3, DIGITAL_OUTPUT, true,
false, NULL);
printk("DIGITAL_OUTPUT: %d\n", sc);
sc = rtems_gpio_request_pin(BBB_P8_7, DIGITAL_INPUT, false, false,
NULL);
printk("DIGITAL_INPUT: %d\n", sc);
sc = rtems_gpio_enable_interrupt(BBB_P8_7, FALLING_EDGE,
UNIQUE_HANDLER, false, gpio_handler, NULL);
printk("interrupt install: %d\n", sc);
while(1)
{
sleep(1);
rtems_gpio_clear(BBB_LED_USR3);
rtems_gpio_set(BBB_LED_USR0);
sleep(1);
rtems_gpio_set(BBB_LED_USR3);
rtems_gpio_clear(BBB_LED_USR0);
}
return NULL;
}
Thanks in advance!--
[1]
Federico Garcia Cruz
Software Engineer
San Lorenzo 47, 3rd Floor, Office 5
Córdoba, Argentina
Phone: +54 351 4217888 / +54 351 4218211
[2] [3]
Links:
------
[1] http://www.tallertechnologies.com
[2] http://www.linkedin.com/company/taller-technologies
[3] https://www.facebook.com/tallertechnologies
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