/*---------------------------------------------------------------------------*/
void
rtimer_arch_init(void)
{
struct rtc_count_config config_rtc_count;
/* Configure RTC in counter mode */
rtc_count_get_config_defaults(&config_rtc_count);
config_rtc_count.prescaler = RTC_COUNT_PRESCALER_DIV_1;
#ifdef TEST_RTC_COUNTER
config_rtc_count.mode = RTC_COUNT_MODE_16BIT;
#else
config_rtc_count.mode = RTC_COUNT_MODE_32BIT;
#endif
config_rtc_count.continuously_update = true;
rtc_count_init(&rtc_instance, RTC, &config_rtc_count);
/* Enable RTC */
rtc_count_enable(&rtc_instance);
#ifdef TEST_RTC_COUNTER
/* Overflow callback and reload value */
rtc_count_register_callback(
&rtc_instance, rtc_overflow_callback, RTC_COUNT_CALLBACK_OVERFLOW);
rtc_count_enable_callback(&rtc_instance, RTC_COUNT_CALLBACK_OVERFLOW);
rtc_count_set_period(&rtc_instance, 100);
#endif
/* Compare callback */
rtc_count_register_callback(
&rtc_instance, rtc_compare_callback, RTC_COUNT_CALLBACK_COMPARE_0);
INFO("RTIMER initialized");
}
/**
* \internal
* \brief Test for event system in asynchronous mode.
*
* This test waits for event channel and user to be ready and then
* starts the RTC to generate overflow event. It waits until the timer
* is started. If the timer starts running then it can be assumed that
* the event has been propagated properly.
*
* \param test Current test case.
*/
static void run_asynchronous_event_test(const struct test_case *test)
{
uint32_t timeout_cycles;
/* Skip test if initialization failed */
test_assert_true(test, init_success,
"Skipping test due to failed initialization");
/* Event action test */
rtc_count_enable(&rtc_inst);
rtc_count_set_period(&rtc_inst, 100);
timeout_cycles = 10000;
do {
timeout_cycles--;
if (tc_get_count_value(&tc_inst)) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"Error: Timeout in event reception/action");
}
/*---------------------------------------------------------------------------*/
static void _hal_tcInit(void)
{
//! [init_conf]
struct rtc_count_config config_rtc_count;
rtc_count_get_config_defaults(&config_rtc_count);
//! [init_conf]
//! [set_config]
config_rtc_count.prescaler = RTC_COUNT_PRESCALER_DIV_1;
config_rtc_count.mode = RTC_COUNT_MODE_16BIT;
config_rtc_count.continuously_update = true;
//! [set_config]
//! [init_rtc]
rtc_count_init(&rtc_instance, RTC, &config_rtc_count);
//! [init_rtc]
//! [period]
rtc_count_set_period(&rtc_instance, 32);
//! [period]
//! [reg_callback]
rtc_count_register_callback(
&rtc_instance, _isr_tc_interrupt, RTC_COUNT_CALLBACK_OVERFLOW);
//! [reg_callback]
//! [en_callback]
rtc_count_enable_callback(&rtc_instance, RTC_COUNT_CALLBACK_OVERFLOW);
//! [en_callback]
//! [enable]
rtc_count_enable(&rtc_instance);
//! [enable]
} /* _hal_tcInit() */
/**
* \brief This function puts the transceiver and device to sleep
*/
void sm_sleep(uint32_t interval)
{
interval = interval * 1000;
rtc_count_set_period(&rtc_instance, interval);
rtc_count_enable(&rtc_instance);
/*put the MCU in standby mode with RTC as wakeup source*/
system_set_sleepmode(SYSTEM_SLEEPMODE_STANDBY);
system_sleep();
}
/**
* \internal
* \brief Test for event system in resynchronous mode.
*
* This test waits for event channel and user to be ready and then
* starts the RTC to generate overflow event. It waits until the timer
* is started. If the timer starts running then it can be assumed that
* the event has been propagated properly.
*
* \param test Current test case.
*/
static void run_resynchronous_event_test(const struct test_case *test)
{
uint32_t timeout_cycles = 1000;
/* Skip test if initialization failed */
test_assert_true(test, init_success,
"Skipping test due to failed initialization");
/* Check whether event user is ready */
do {
timeout_cycles--;
if (events_is_users_ready(&events)) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"Timeout error: Event user not ready");
/* Check whether event channel is ready */
timeout_cycles = 1000;
do {
timeout_cycles--;
if (!events_is_busy(&events)) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"Timeout error: Event channel not ready");
/* Event action test */
rtc_count_enable(&rtc_inst);
rtc_count_set_period(&rtc_inst, 100);
timeout_cycles = 10000;
do {
timeout_cycles--;
if (tc_get_count_value(&tc_inst)) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"Error: Timeout in event reception/action");
}
//! [setup_dac]
void configure_dac(void)
{
//! [setup_dac_config]
struct dac_config config_dac;
//! [setup_dac_config]
//! [setup_dac_config_default]
dac_get_config_defaults(&config_dac);
//! [setup_dac_config_default]
//! [setup_dac_start_on_event]
#if (SAML21)
dac_instance.start_on_event[DAC_CHANNEL_0] = true;
#else
dac_instance.start_on_event = true;
#endif
//! [setup_dac_start_on_event]
//! [setup_dac_instance]
dac_init(&dac_instance, DAC, &config_dac);
//! [setup_dac_instance]
//! [setup_dac_on_event_start_conversion]
struct dac_events events =
#if (SAML21)
{ .on_event_chan0_start_conversion = true };
#else
{ .on_event_start_conversion = true };
#endif
//! [setup_dac_on_event_start_conversion]
//! [enable_dac_event]
dac_enable_events(&dac_instance, &events);
//! [enable_dac_event]
}
//! [setup_dac]
//! [setup_dac_channel]
void configure_dac_channel(void)
{
//! [setup_dac_chan_config]
struct dac_chan_config config_dac_chan;
//! [setup_dac_chan_config]
//! [setup_dac_chan_config_default]
dac_chan_get_config_defaults(&config_dac_chan);
//! [setup_dac_chan_config_default]
//! [set_dac_chan_config]
dac_chan_set_config(&dac_instance, DAC_CHANNEL_0,
&config_dac_chan);
//! [set_dac_chan_config]
//! [enable_dac_channel]
dac_chan_enable(&dac_instance, DAC_CHANNEL_0);
//! [enable_dac_channel]
}
//! [setup_dac_channel]
int main(void)
{
//! [data_length_var]
uint32_t i;
//! [data_length_var]
system_init();
//! [setup_init]
//! [init_rtc]
configure_rtc_count();
//! [init_rtc]
//! [set_rtc_period]
rtc_count_set_period(&rtc_instance, 1);
//! [set_rtc_period]
//! [init_dac]
configure_dac();
//! [init_dac]
//! [init_dac_chan]
configure_dac_channel();
//! [init_dac_chan]
//! [enable_dac]
dac_enable(&dac_instance);
//! [enable_dac]
//! [init_event_resource]
configure_event_resource();
//! [init_event_resource]
//! [register_dac_callback]
dac_register_callback(&dac_instance, DAC_CHANNEL_0,
dac_callback,DAC_CALLBACK_TRANSFER_COMPLETE);
//! [register_dac_callback]
//! [enable_dac_callback]
dac_chan_enable_callback(&dac_instance, DAC_CHANNEL_0,
DAC_CALLBACK_TRANSFER_COMPLETE);
//! [enable_dac_callback]
//! [setup_dac_data]
for (i = 0;i < DATA_LENGTH;i++) {
dac_data[i] = 0xfff * i;
}
//! [setup_dac_data]
//! [setup_init]
//! [main_start]
//! [main_write]
dac_chan_write_buffer_job(&dac_instance, DAC_CHANNEL_0,
dac_data, DATA_LENGTH);
//! [main_write]
//! [main_check_transfer_done]
while (!transfer_is_done) {
/* Wait for transfer done */
}
//! [main_check_transfer_done]
//! [main_loop]
while (1) {
}
//! [main_loop]
//! [main_start]
}
/**
* \brief Initialize the TC3 & RTC for unit test
*
* Initializes the RTC module and TC3 module which are used as
* event generator and event user respectively.
*/
static void test_event_gen_user_init(void)
{
enum status_code status;
init_success = true;
/* Timer configuration (Event User) */
struct tc_config config_tc;
tc_get_config_defaults(&config_tc);
config_tc.counter_16_bit.compare_capture_channel[0]
= (0xFFFF / 4);
/* Initialize the TC3 */
status = tc_init(&tc_inst, TC3, &config_tc);
if (status != STATUS_OK) {
init_success = false;
}
struct tc_events events_tc;
events_tc.on_event_perform_action = true;
events_tc.event_action = TC_EVENT_ACTION_START;
tc_enable_events(&tc_inst, &events_tc);
/* Enable the TC3 */
tc_enable(&tc_inst);
/* RTC configuration (Event Generator) */
struct rtc_count_config config_rtc_count;
struct rtc_count_events config_rtc_event
= { .generate_event_on_overflow = true };
/* Initialize the RTC module */
rtc_count_get_config_defaults(&config_rtc_count);
config_rtc_count.prescaler = RTC_COUNT_PRESCALER_DIV_1;
config_rtc_count.mode = RTC_COUNT_MODE_16BIT;
#ifdef FEATURE_RTC_CONTINUOUSLY_UPDATED
config_rtc_count.continuously_update = true;
#endif
config_rtc_count.compare_values[0] = 50;
status = rtc_count_init(&rtc_inst, RTC, &config_rtc_count);
if (status != STATUS_OK) {
init_success = false;
}
/* Enable RTC events */
config_rtc_event.generate_event_on_overflow = true;
rtc_count_enable_events(&rtc_inst, &config_rtc_event);
}
/**
* \internal
* \brief Setup Function: Synchronous event propagation.
*
* This function initializes the event system channel 0 and the RTC
* module (event generator) to be in the same clock domain for
* synchronous event propagation.
*
* \param test Current test case.
*/
static void setup_synchronous_event_test(const struct test_case *test)
{
struct events_config events_conf;
/* Get default event channel configuration */
events_get_config_defaults(&events_conf);
events_conf.clock_source = GCLK_GENERATOR_2;
events_conf.edge_detect = EVENTS_EDGE_DETECT_RISING;
events_conf.path = EVENTS_PATH_SYNCHRONOUS;
events_conf.generator = TEST_EVENT_GEN;
events_allocate(&events, &events_conf);
events_attach_user(&events, TEST_EVENT_USER);
}
/**
* \internal
* \brief Test for event system in synchronous mode.
*
* This test waits for event channel and user to be ready and then
* starts the RTC to generate overflow event. It waits until the timer
* is started. If the timer starts running then it can be assumed that
* the event has been propagated properly.
*
* \param test Current test case.
*/
static void run_synchronous_event_test(const struct test_case *test)
{
uint32_t timeout_cycles = 1000;
/* Skip test if initialization failed */
test_assert_true(test, init_success,
"Skipping test due to failed initialization");
/* Check whether event user is ready */
do {
timeout_cycles--;
if (events_is_users_ready(&events)) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"Timeout error: Event user not ready");
/* Check whether event channel is ready */
timeout_cycles = 1000;
do {
timeout_cycles--;
if (!events_is_busy(&events)) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"Timeout error: Event channel not ready");
/* Event action test */
rtc_count_enable(&rtc_inst);
rtc_count_set_period(&rtc_inst, 100);
timeout_cycles = 10000;
do {
timeout_cycles--;
if (tc_get_count_value(&tc_inst)) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"Error: Timeout in event reception/action");
}
void rtc_set_count(uint32_t rtc_count)
{
rtc_count_set_period(&rtc_instance, rtc_count);
}
