/*! \brief Configure the RTC timer count after which interrupts comes
*/
void configure_rtc_count(void)
{
//! [init_conf]
struct rtc_count_config config_rtc_count;
typedef enum rtc_count_prescaler rtc_count_prescaler_t;
#if DEF_SURF_LOW_POWER_SENSOR_ENABLE == 1
struct rtc_count_events config_rtc_event =
{
.generate_event_on_periodic[DEF_LOWPOWER_SENSOR_EVENT_PERIODICITY] = true
};
#endif
rtc_count_get_config_defaults(&config_rtc_count);
volatile uint16_t temp;
//! [set_config]
config_rtc_count.prescaler = (rtc_count_prescaler_t)RTC_MODE0_CTRL_PRESCALER_DIV2;
config_rtc_count.mode = RTC_COUNT_MODE_32BIT;
#ifdef FEATURE_RTC_CONTINUOUSLY_UPDATED
config_rtc_count.continuously_update = true;
#endif
config_rtc_count.clear_on_match = true;
//! [init_rtc]
rtc_count_init(&rtc_instance, RTC, &config_rtc_count);
#if DEF_SURF_LOW_POWER_SENSOR_ENABLE == 1
/* Enable RTC events */
config_rtc_event.generate_event_on_periodic[DEF_LOWPOWER_SENSOR_EVENT_PERIODICITY] = true;
rtc_count_enable_events(&rtc_instance, &config_rtc_event);
#endif
/*Set timer period */
temp = TIME_PERIOD_1MSEC * rtc_timer_msec;
rtc_count_set_compare(&rtc_instance, temp, RTC_COUNT_COMPARE_0);
//! [enable]
rtc_count_enable(&rtc_instance);
//! [enable]
}
/*! \brief Initialize timer
*
*/
void timer_init(void)
{
/* Configure and enable RTC */
configure_rtc_count();
/* Configure and enable callback */
configure_rtc_callbacks();
}
//! [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]
}
