/**
* \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) {
}
}
/**
* Initialize the PDCA transfer for the example.
*/
static void init_pdca(void)
{
/* PDCA channel options */
static const pdca_channel_config_t pdca_tx_configs = {
.addr = (void *)event_string,
.pid = PDCA_PID_USART2_TX,
.size = sizeof(event_string),
.r_addr = 0,
.r_size = 0,
.ring = false,
.etrig = true,
.transfer_size = PDCA_MR_SIZE_BYTE
};
/* Enable PDCA module */
pdca_enable(PDCA);
/* Init PDCA channel with the pdca_options.*/
pdca_channel_set_config(PEVC_ID_USER_PDCA_0, &pdca_tx_configs);
/* Set callback for PDCA channel */
pdca_channel_set_callback(PEVC_ID_USER_PDCA_0, pdca_tranfer_done,
PDCA_0_IRQn, 1, PDCA_IER_TRC | PDCA_IER_TERR);
/* Enable PDCA channel */
pdca_channel_enable(PEVC_ID_USER_PDCA_0);
}
/**
* Configure serial console.
*/
static void configure_console(void)
{
const usart_serial_options_t uart_serial_options = {
.baudrate = CONF_UART_BAUDRATE,
#ifdef CONF_UART_CHAR_LENGTH
.charlength = CONF_UART_CHAR_LENGTH,
#endif
.paritytype = CONF_UART_PARITY,
#ifdef CONF_UART_STOP_BITS
.stopbits = CONF_UART_STOP_BITS,
#endif
};
/* Configure console. */
stdio_serial_init(CONF_UART, &uart_serial_options);
}
/**
* \brief Main entry point for event 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-- Events example 2 --\r\n");
printf("-- %s\r\n", BOARD_NAME);
printf("-- Compiled: %s %s --\r\n", __DATE__, __TIME__);
/* Configure pin to trigger an enent on falling edge */
ioport_set_pin_mode(CONF_EXAMPLE_PIN_EVENT, IOPORT_MODE_PULLUP |
IOPORT_MODE_MUX_C);
ioport_disable_pin(CONF_EXAMPLE_PIN_EVENT);
ioport_set_pin_sense_mode(CONF_EXAMPLE_PIN_EVENT, IOPORT_SENSE_FALLING);
gpio_enable_pin_periph_event(CONF_EXAMPLE_PIN_EVENT);
printf(CONF_EXAMPLE_EVENT_MSG);
init_events();
init_pdca();
while (1) {
/* Toggle LED0 every 500 ms */
LED_Toggle(LED0);
delay_ms(500);
}
}
