/**
* \brief Main entry point for GPIO example.
*/
int main(void)
{
/* Initialize the SAM system */
sysclk_init();
board_init();
/* Initialize the console uart */
configure_console();
/* Output example information */
printf("\r\n\r\n-- GPIO interrupt and event example --\r\n");
printf("-- %s\r\n", BOARD_NAME);
printf("-- Compiled: %s %s --\r\n", __DATE__, __TIME__);
//! [config_button_0_trig_fall]
/* Configure push button 0 to trigger an interrupt on falling edge */
//! [config_button_0_trig_fall_1]
ioport_set_pin_dir(EXAMPLE_BUTTON_INT, IOPORT_DIR_INPUT);
ioport_set_pin_mode(EXAMPLE_BUTTON_INT, IOPORT_MODE_PULLUP |
IOPORT_MODE_GLITCH_FILTER);
ioport_set_pin_sense_mode(EXAMPLE_BUTTON_INT, IOPORT_SENSE_FALLING);
//! [config_button_0_trig_fall_1]
//! [config_button_0_trig_fall_2]
if (!gpio_set_pin_callback(EXAMPLE_BUTTON_INT, pb0_callback, 1)) {
printf("Set pin callback failure!\r\n");
while (1) {
}
}
//! [config_button_0_trig_fall_2]
//! [enable_pin_interrupt]
gpio_enable_pin_interrupt(EXAMPLE_BUTTON_INT);
//! [enable_pin_interrupt]
//! [config_button_0_trig_fall]
printf("Press %s to trigger LED.\r\n", BUTTON_0_NAME);
/* Configure pin to trigger an event on falling edge */
ioport_set_pin_mode(EXAMPLE_PIN_EVENT, IOPORT_MODE_PULLUP |
IOPORT_MODE_MUX_C);
ioport_disable_pin(EXAMPLE_PIN_EVENT);
ioport_set_pin_sense_mode(EXAMPLE_PIN_EVENT, IOPORT_SENSE_FALLING);
gpio_enable_pin_periph_event(EXAMPLE_PIN_EVENT);
printf("Connect %s to %s to trigger an event.\r\n", EXAMPLE_PIN_NAME,
EXAMPLE_GND_NAME);
init_pevc();
init_pdca();
while (1) {
}
}
/**
* \brief Test GPIO interrupt.
*
* \param test Current test case.
*/
static void run_gpio_int_test(const struct test_case *test)
{
/* Configure an input pin to trigger an interrupt on falling edge */
ioport_set_pin_dir(CONF_TEST_GPIO_IN, IOPORT_DIR_INPUT);
ioport_set_pin_mode(CONF_TEST_GPIO_IN, IOPORT_MODE_PULLUP |
IOPORT_MODE_GLITCH_FILTER);
ioport_set_pin_sense_mode(CONF_TEST_GPIO_IN, IOPORT_SENSE_FALLING);
gpio_set_pin_callback(CONF_TEST_GPIO_IN, gpio_pin_callback, 1);
gpio_enable_pin_interrupt(CONF_TEST_GPIO_IN);
/* Configure an output pin */
ioport_set_pin_dir(CONF_TEST_GPIO_OUT, IOPORT_DIR_OUTPUT);
ioport_set_pin_level(CONF_TEST_GPIO_OUT, IOPORT_PIN_LEVEL_HIGH);
/* Trigger an interrupt */
gpio_int_happened = false;
ioport_set_pin_level(CONF_TEST_GPIO_OUT, IOPORT_PIN_LEVEL_LOW);
delay_ms(5);
test_assert_true(test, gpio_int_happened,
"No interrupt has been triggered!");
}
