static void prvSetupHardware( void )
{
extern void SystemCoreClockUpdate( void );
struct eic_line_config xEICLineConfiguration;
/* Configure the external interrupt controller so button pushes can
generate interrupts. */
xEICLineConfiguration.eic_mode = EIC_MODE_EDGE_TRIGGERED;
xEICLineConfiguration.eic_edge = EIC_EDGE_FALLING_EDGE;
xEICLineConfiguration.eic_level = EIC_LEVEL_LOW_LEVEL;
xEICLineConfiguration.eic_filter = EIC_FILTER_DISABLED;
xEICLineConfiguration.eic_async = EIC_ASYNCH_MODE;
eic_enable( EIC );
eic_line_set_config( EIC, GPIO_PUSH_BUTTON_EIC_LINE, &xEICLineConfiguration );
eic_line_set_callback( EIC, GPIO_PUSH_BUTTON_EIC_LINE, prvButtonISR, EIC_5_IRQn, 0 );
eic_line_enable( EIC, GPIO_PUSH_BUTTON_EIC_LINE );
/* ASF function to setup clocking. */
sysclk_init();
/* Ensure all priority bits are assigned as preemption priority bits. */
NVIC_SetPriorityGrouping( 0 );
/* Atmel library function to setup for the evaluation kit being used. */
board_init();
/* Initialise the sleep manager in case the low power demo is being used. */
sleepmgr_init();
}
//! [eic_setup]
static void eic_setup(void)
{
//! [enable_eic_module]
eic_enable(EIC);
//! [enable_eic_module]
struct eic_line_config eic_line_conf;
eic_line_conf.eic_mode = EIC_MODE_EDGE_TRIGGERED;
eic_line_conf.eic_edge = EIC_EDGE_FALLING_EDGE;
eic_line_conf.eic_level = EIC_LEVEL_LOW_LEVEL;
eic_line_conf.eic_filter = EIC_FILTER_DISABLED;
eic_line_conf.eic_async = EIC_ASYNCH_MODE;
//! [configure_eic_mode]
eic_line_set_config(EIC, GPIO_PUSH_BUTTON_EIC_LINE, &eic_line_conf);
//! [configure_eic_mode]
//! [set_eic_callback_1]
eic_line_set_callback(EIC, GPIO_PUSH_BUTTON_EIC_LINE, eic_callback,
GPIO_PUSH_BUTTON_EIC_IRQ, 1);
//! [set_eic_callback_1]
//! [enable_eic_line]
eic_line_enable(EIC, GPIO_PUSH_BUTTON_EIC_LINE);
//! [enable_eic_line]
}
/**
* \brief Event Button Init.
*/
void event_button_init(void)
{
// Structure holding the configuration parameters
// of the EIC module.
struct eic_line_config eic_line_conf;
// Initialize EIC Controller
sysclk_enable_peripheral_clock(EIC);
// Enable level-triggered interrupt.
eic_line_conf.eic_mode = EIC_MODE_EDGE_TRIGGERED;
// Interrupt will trigger on low-level.
eic_line_conf.eic_level = EIC_LEVEL_LOW_LEVEL;
// Edge on falling edge
eic_line_conf.eic_edge = EIC_EDGE_FALLING_EDGE;
// Enable filter.
eic_line_conf.eic_filter = EIC_FILTER_DISABLED;
// For Wake Up mode, initialize in asynchronous mode
eic_line_conf.eic_async = EIC_ASYNCH_MODE;
// Enable clock for EIC controller
eic_enable(EIC);
// Init the EIC controller with the options
eic_line_set_config(EIC, GPIO_PUSH_BUTTON_EIC_LINE,
&eic_line_conf);
// Init the callback
eic_line_set_callback(EIC, GPIO_PUSH_BUTTON_EIC_LINE, eic5_callback,
EIC_5_IRQn, 1);
// Enable the EIC line
eic_line_enable(EIC, GPIO_PUSH_BUTTON_EIC_LINE);
// EIC can wake the device from backup mode
bpm_enable_wakeup_source(BPM, BPM_BKUP_WAKEUP_SRC_EIC
| BPM_BKUP_WAKEUP_SRC_AST);
// EIC can wake the device from backup mode
bpm_enable_backup_pin(BPM, 1 << GPIO_PUSH_BUTTON_EIC_LINE);
// Retain I/O lines after wakeup from backup
bpm_disable_io_retention(BPM);
bpm_enable_io_retention(BPM);
bpm_enable_fast_wakeup(BPM);
sysclk_disable_peripheral_clock(EIC);
event_pbEvent = false;
// Initialize WDT Controller
sysclk_enable_peripheral_clock(WDT);
enable_wdt();
}
/**
* Configure push button 0 to generate an EIC interrupt.
*/
static void configure_button(void)
{
struct eic_line_config eic_line_conf;
eic_line_conf.eic_mode = EIC_MODE_EDGE_TRIGGERED;
eic_line_conf.eic_edge = EIC_EDGE_FALLING_EDGE;
eic_line_conf.eic_level = EIC_LEVEL_LOW_LEVEL;
eic_line_conf.eic_filter = EIC_FILTER_DISABLED;
eic_line_conf.eic_async = EIC_ASYNCH_MODE;
eic_enable(EIC);
eic_line_set_config(EIC, GPIO_PUSH_BUTTON_EIC_LINE,
&eic_line_conf);
eic_line_set_callback(EIC, GPIO_PUSH_BUTTON_EIC_LINE, set_toggle_flag,
GPIO_PUSH_BUTTON_EIC_IRQ, 1);
eic_line_enable(EIC, GPIO_PUSH_BUTTON_EIC_LINE);
}
static void config_buttons(void)
{
/* Initialize EIC for button wakeup. */
struct eic_line_config eic_line_conf = {
EIC_MODE_EDGE_TRIGGERED,
EIC_EDGE_FALLING_EDGE,
EIC_LEVEL_LOW_LEVEL,
EIC_FILTER_DISABLED,
EIC_ASYNCH_MODE
};
eic_enable(EIC);
eic_line_set_config(EIC, GPIO_PUSH_BUTTON_EIC_LINE,
&eic_line_conf);
eic_line_set_callback(EIC, GPIO_PUSH_BUTTON_EIC_LINE, eic_5_callback,
EIC_5_IRQn, 1);
eic_line_enable(EIC, GPIO_PUSH_BUTTON_EIC_LINE);
}
/**
* \brief Initializes and enables interrupt pin change
*/
static void ui_enable_asynchronous_interrupt(void)
{
/* Initialize EIC for button wakeup */
sysclk_enable_peripheral_clock(EIC);
struct eic_line_config eic_opt ={
.eic_mode = EIC_MODE_EDGE_TRIGGERED,
.eic_edge = EIC_EDGE_FALLING_EDGE,
.eic_level = EIC_LEVEL_LOW_LEVEL,
.eic_filter = EIC_FILTER_DISABLED,
.eic_async = EIC_ASYNCH_MODE
};
eic_enable(EIC);
eic_line_set_config(EIC, UI_WAKEUP_EIC_LINE, &eic_opt);
eic_line_set_callback(EIC, UI_WAKEUP_EIC_LINE, UI_WAKEUP_HANDLER,
UI_WAKEUP_IRQN, UI_WAKEUP_IRQ_LEVEL);
eic_line_enable(EIC, UI_WAKEUP_EIC_LINE);
eic_line_enable_interrupt(EIC, UI_WAKEUP_EIC_LINE);
}
/**
* \brief Application entry point for eic example.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
struct eic_line_config eic_line_conf;
/* Initialize the SAM system. */
sysclk_init();
board_init();
/* Initialize the UART console. */
configure_console();
/* Output example information. */
puts(STRING_HEADER);
eic_line_conf.eic_mode = EIC_MODE_EDGE_TRIGGERED;
eic_line_conf.eic_edge = EIC_EDGE_FALLING_EDGE;
eic_line_conf.eic_level = EIC_LEVEL_LOW_LEVEL;
eic_line_conf.eic_filter = EIC_FILTER_DISABLED;
eic_line_conf.eic_async = EIC_ASYNCH_MODE;
eic_enable(EIC);
eic_line_set_config(EIC, GPIO_PUSH_BUTTON_EIC_LINE,
&eic_line_conf);
eic_line_set_callback(EIC, GPIO_PUSH_BUTTON_EIC_LINE, set_toggle_flag,
GPIO_PUSH_BUTTON_EIC_IRQ, 1);
eic_line_enable(EIC, GPIO_PUSH_BUTTON_EIC_LINE);
puts("--Push the button to toggle the LED--\r\n\r");
while (1) {
if (bToggle == 1) {
puts("--Toggle the LED--\r");
ioport_toggle_port_level(EXAMPLE_LED_PORT,
EXAMPLE_LED_MASK);
bToggle = 0;
}
}
}
/* \brief Main entry point
* This is an example of how to use watchdog.
*/
int main(void)
{
struct eic_line_config eic_line_cfg;
/* Initialize the SAM system */
sysclk_init();
board_init();
/* Initialize the console uart */
configure_console();
/* Output example information */
printf("\r\n\r\n-- Watchdog example --\r\n");
printf("-- %s\r\n", BOARD_NAME);
printf("-- Compiled: %s %s --\r\n", __DATE__, __TIME__);
/* Systick configuration. */
if (SysTick_Config(sysclk_get_cpu_hz() / 1000)) {
puts("-F- Systick configuration error\r");
}
/* Configure push button */
eic_line_cfg.eic_mode = EIC_MODE_EDGE_TRIGGERED;
eic_line_cfg.eic_edge = EIC_EDGE_FALLING_EDGE;
eic_line_cfg.eic_level = EIC_LEVEL_LOW_LEVEL;
eic_line_cfg.eic_filter = EIC_FILTER_DISABLED;
eic_line_cfg.eic_async = EIC_ASYNCH_MODE;
eic_enable(EIC);
eic_line_set_config(EIC, GPIO_PUSH_BUTTON_EIC_LINE,
&eic_line_cfg);
eic_line_set_callback(EIC, GPIO_PUSH_BUTTON_EIC_LINE, set_toggle_flag,
EIC_5_IRQn, 1);
eic_line_enable(EIC, GPIO_PUSH_BUTTON_EIC_LINE);
/*
* Intialize and enable the watchdog.
* Use default configuration but change timeout period
* to about 4.56s (Ttimeout = 2pow(PSEL+1) / Fclk_cnt = 524288 / 115000).
*/
wdt_get_config_defaults(&g_wdt_cfg);
g_wdt_cfg.timeout_period = WDT_PERIOD_524288_CLK;
wdt_init(&g_wdt_inst, WDT, &g_wdt_cfg);
wdt_enable(&g_wdt_inst);
puts("\r\nPlease press PB0 to simulate a deadlock.\r");
while (1) {
if (g_b_systick_event == true) {
g_b_systick_event = false;
/* Toggle LED at the given period. */
if ((g_ul_ms_ticks % BLINK_PERIOD) == 0) {
ioport_toggle_pin_level(LED0_GPIO);
}
/* Clear watchdog at the given period. */
if ((g_ul_ms_ticks % WDT_RESTART_PERIOD) == 0) {
wdt_clear(&g_wdt_inst);
}
}
/* Simulate deadlock when button is pressed. */
if (g_b_button_event == true) {
puts("The program enters an infinite loop, the WDT reset will " \
"trigger in about 5s.\r");
wdt_clear(&g_wdt_inst);
while (1) {
if (g_b_systick_event == true) {
g_b_systick_event = false;
if ((g_ul_ms_ticks % BLINK_PERIOD) == 0) {
printf(".");
}
}
}
}
}
}