int main(void)
{
pmic_init();
board_init();
sysclk_init();
sleepmgr_init();
cpu_irq_enable();
/* Enables the Timer defined in conf_example.h : TCE0 in this example */
tc_enable(&TIMER_EXAMPLE);
/* Configures the interrupt level of CCA and CCB modules : low */
tc_set_cca_interrupt_level(&TIMER_EXAMPLE, TC_INT_LVL_LO);
tc_set_ccb_interrupt_level(&TIMER_EXAMPLE, TC_INT_LVL_LO);
/* Configures the waveform generator of this Timer mode in NORMAL mode */
tc_set_wgm(&TIMER_EXAMPLE, TC_WG_NORMAL);
/* Declares the interrupt functions which will be called when CCA and CCB
interrupts will occur */
tc_set_cca_interrupt_callback(&TIMER_EXAMPLE,
example_cca_interrupt_callback);
tc_set_ccb_interrupt_callback(&TIMER_EXAMPLE,
example_ccb_interrupt_callback);
/* Configures the Timer period*/
tc_write_period(&TIMER_EXAMPLE, TIMER_EXAMPLE_PERIOD);
/* Configures the CCA and CCB levels*/
tc_write_cc(&TIMER_EXAMPLE, TC_CCA, TIMER_EXAMPLE_PERIOD/2);
tc_write_cc(&TIMER_EXAMPLE, TC_CCB, TIMER_EXAMPLE_PERIOD/2);
/* Enables the CCA and CCB channels*/
tc_enable_cc_channels(&TIMER_EXAMPLE,TC_CCAEN);
tc_enable_cc_channels(&TIMER_EXAMPLE,TC_CCAEN);
/* Configures the waveform genertaor in Dual Slope mode and Top*/
tc_set_wgm(&TIMER_EXAMPLE,TC_WG_DS_T);
/* Enables and configures the deadtime of CCA and CCB outputs*/
tc_awex_enable_cca_deadtime(&AWEXE);
tc_awex_enable_ccb_deadtime(&AWEXE);
tc_awex_set_dti_high(&AWEXE, TIMER_EXAMPLE_PERIOD/6);
tc_awex_set_dti_low(&AWEXE, TIMER_EXAMPLE_PERIOD/6);
/* Outputs CCA and CCB on Port E0 and E1*/
tc_awex_set_output_override(&AWEXE, 0x03);
tc_set_resolution(&TIMER_EXAMPLE, 10000);
do {
/* Go to sleep, everything is handled by interrupts. */
sleepmgr_enter_sleep();
} while (1);
}
/**
* \brief Initialize Timer/Counters used to simulate oven actuation signal
*
* TCC0 is set up to generate a dual variable frequency signal with dead-time
* insertion using the AWEX module. This is similar to how heating elements are
* actuated in real induction ovens. Its output is on pin C2 which is marked as
* RXD on header J1.
*
* TCC1 is set up to capture a frequency signal via a pin change event using the
* XMEGA Event System. Its input is pin C4 which is marked as SS on header J1.
*/
void main_init_tc(void)
{
/* Set up timer for PWM output, used to actuate cooking element */
tc_enable(&OVEN_FREQ_TC);
/* Configures the waveform generator in Frequency generation mode */
tc_set_wgm(&OVEN_FREQ_TC, TC_WG_FRQ);
/* Configures the CCA level. This controls frequency generation */
tc_write_cc(&OVEN_FREQ_TC, TC_CCA, FREQ_TIMER_PERIOD_INIT / 2);
/* Enables and configures the deadtime of AWEX channel B outputs */
tc_awex_enable_ccb_deadtime(&AWEXC);
tc_awex_set_dti_high(&AWEXC, FREQ_TIMER_PERIOD_INIT / 4);
tc_awex_set_dti_low(&AWEXC, FREQ_TIMER_PERIOD_INIT / 4);
/* Output of AWEX channel B is on pins C2 and C3 */
tc_awex_set_output_override(&AWEXC, 0x0C);
/* Make sure that the output is initially turned off */
tc_write_clock_source(&OVEN_FREQ_TC, TC_CLKSEL_OFF_gc);
/* Set up timer for input capture for the simulation to read "real"
* power
*/
tc_enable(&OVEN_FREQ_CAPT_TC);
/* Select Event Channel 1 as input to the timer, and perform frequency
* capture.
*/
tc_set_input_capture(&OVEN_FREQ_CAPT_TC, TC_EVSEL_CH1_gc,
TC_EVACT_FRQ_gc);
/* Enable Capture Channel A */
tc_enable_cc_channels(&OVEN_FREQ_CAPT_TC, TC_CCAEN);
/* Make sure pin C4 is configured for input and sensing on rise and fall
* and pin C2 is configured for output.
*/
ioport_configure_pin(J1_PIN4, IOPORT_DIR_INPUT | IOPORT_BOTHEDGES);
ioport_configure_pin(J1_PIN2, IOPORT_DIR_OUTPUT);
/* Turn on power to the event system */
PR.PRGEN &= ~PR_EVSYS_bm;
/* Use pin C4 as input to Event Channel 1 */
EVSYS.CH1MUX = EVSYS_CHMUX_PORTC_PIN4_gc;
/* Turn on timer used for input capture */
tc_write_clock_source(&OVEN_FREQ_CAPT_TC, TC_CLKSEL_DIV256_gc);
}
