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linux-embedded-examples
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Refactor gpio_interrupt code

This commit is contained in:
Sanchayan Maity 2017-04-28 10:27:53 +05:30
parent 7b815d3369
commit 1f76a72c2b
1 changed files with 18 additions and 21 deletions
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39
gpio_interrupt/gpio_interrupt.c
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@ -14,12 +14,23 @@
* libsoc GPIO documentation: http://jackmitch.github.io/libsoc/c/gpio/#gpio
*/
volatile bool interrupt_occurred = false;
volatile bool led_status = false;
static uint32_t times = 0;
gpio *gpio_interrupt = NULL;
gpio *gpio_led = NULL;
int gpio_interrupt_callback(void* arg)
{
interrupt_occurred = true;
if (!led_status) {
led_status = true;
libsoc_gpio_set_level(gpio_led, HIGH);
} else {
led_status = false;
libsoc_gpio_set_level(gpio_led, LOW);
}
times++;
printf("Interrupt occurred %d times\n", times);
return 0;
}
@ -29,8 +40,6 @@ int main(void)
uint32_t gpio_input;
uint32_t led_output;
uint32_t ret = 0;
gpio *gpio_interrupt = NULL;
gpio *gpio_led = NULL;
printf("Enter the GPIO number to use as interrupt:\t");
scanf("%d", &gpio_input);
@ -79,25 +88,13 @@ int main(void)
goto exit;
}
printf("Waiting for interrupt\n");
printf("Waiting for interrupt. Press 'q' and 'Enter' at any time to exit\n");
char key = -1;
while (true) {
if (interrupt_occurred) {
interrupt_occurred = false;
if (!led_status) {
led_status = true;
libsoc_gpio_set_level(gpio_led, HIGH);
} else {
led_status = false;
libsoc_gpio_set_level(gpio_led, LOW);
}
printf("Interrupt occurred\n");
/* Uncomment this to exit on first interrupt */
//goto exit;
}
usleep(200);
key = fgetc(stdin);
if (key == 'q')
goto exit;
}
exit: