int main(void)
{
/* Usual initializations */
board_init();
sysclk_init();
sleepmgr_init();
irq_initialize_vectors();
cpu_irq_enable();
/* Unmask clock for TCC4 */
tc45_enable(&TCC4);
/* Configure TC in normal mode */
tc45_set_wgm(&TCC4, TC45_WG_NORMAL);
/* Configure period equal to resolution to obtain 1Hz */
tc45_write_period(&TCC4, TIMER_EXAMPLE_RESOLUTION);
/* Configure CCA to occur at the middle of TC period */
tc45_write_cc(&TCC4, TC45_CCA, TIMER_EXAMPLE_RESOLUTION / 2);
/* Configure CCB to occur at the quarter of TC period */
tc45_write_cc(&TCC4, TC45_CCB, TIMER_EXAMPLE_RESOLUTION / 4);
/* Enable both CCA and CCB channels */
tc45_enable_cc_channels(&TCC4, TC45_CCACOMP);
tc45_enable_cc_channels(&TCC4, TC45_CCBCOMP);
/*
* Configure interrupts callback functions for TCC4
* overflow interrupt, CCA interrupt and CCB interrupt
*/
tc45_set_overflow_interrupt_callback(&TCC4,
example_ovf_interrupt_callback);
tc45_set_cca_interrupt_callback(&TCC4,
example_cca_interrupt_callback);
tc45_set_ccb_interrupt_callback(&TCC4,
example_ccb_interrupt_callback);
/*
* Enable TC interrupts (overflow, CCA and CCB)
*/
tc45_set_overflow_interrupt_level(&TCC4, TC45_INT_LVL_LO);
tc45_set_cca_interrupt_level(&TCC4, TC45_INT_LVL_LO);
tc45_set_ccb_interrupt_level(&TCC4, TC45_INT_LVL_LO);
/*
* Run TCC4
*/
tc45_set_resolution(&TCC4, TIMER_EXAMPLE_RESOLUTION);
do {
/* Go to sleep, everything is handled by interrupts. */
sleepmgr_enter_sleep();
} while (1);
}
int main(void)
{
/* Usual initializations */
board_init();
sysclk_init();
sleepmgr_init();
irq_initialize_vectors();
cpu_irq_enable();
/*
* Configure TCC4 to generate 50ms overflow interrupt
* using 500kHz (2us) resolution clock (50ms = 25000 * 2us)
*/
/* Unmask clock for TCC4 */
tc45_enable(&TCC4);
/* Enable overflow interrupt */
tc45_set_overflow_interrupt_level(&TCC4, TC45_INT_LVL_LO);
/* Configure TC in normal mode */
tc45_set_wgm(&TCC4, TC45_WG_NORMAL);
/* Configure call back interrupt */
tc45_set_overflow_interrupt_callback(&TCC4,
example_overflow_interrupt_callback);
/* Configure TC period and resolution */
tc45_write_period(&TCC4, 25000);
tc45_set_resolution(&TCC4, 500000);
/*
* Configure TCD5 to generate 2ms Single Slope PWM
*/
/* Unmask clock for TCD5 */
tc45_enable(&TCD5);
/* Configure TC in PWM Single Slope PWM */
tc45_set_wgm(&TCD5, TC45_WG_SS);
/* Use the max period (2MHz / FFFFh = 30Hz) */
tc45_write_period(&TCC4, 0xFFFF);
/* Initialize and enable Channel A */
tc45_write_cc(&TCD5, TC45_CCA, 0);
tc45_enable_cc_channels(&TCD5, TC45_CCACOMP);
/* Run TC at 2MHz clock resolution (CPU frequency 32MHz) */
tc45_set_resolution(&TCD5, 20000000);
do {
/* Go to sleep, everything is handled by interrupts. */
sleepmgr_enter_sleep();
} while (1);
}
/**
* \brief This function configure and start timer1,which is TC4
* - Enable timer-1
* - Configure as pulse-width capture event action with event channel 1
* as event selection
* - Configure clock source as system clock with prescalar 1 and start on
* next event
* - Enable capture channel A
*/
void rtccalib_config_start_timer_one(void)
{
/* Enable Timer-1 */
tc45_enable(&TIMER1_FOR_CALIB);
/* Configure event action as pulse-width capture with event channel 1
* as event selection */
tc45_set_input_capture(&TIMER1_FOR_CALIB, TC45_EVSEL_CH1_gc,
TC45_EVACT_PWF_gc);
/* Configure timer-1 clock source */
tc45_write_clock_source(&TIMER1_FOR_CALIB, TC45_CLKSEL_DIV1_gc);
/* Configure to start on next event */
tc45_set_evstart(&TIMER1_FOR_CALIB);
/* Enable capture channel A */
tc45_enable_cc_channels(&TIMER1_FOR_CALIB, TC45_CCACAPT);
}
int main(void)
{
uint8_t otmx_mode_index = 0;
bool btn_released = true;
/* Usual initializations */
board_init();
sysclk_init();
sleepmgr_init();
irq_initialize_vectors();
cpu_irq_enable();
/* Enables the Timers defined in conf_example.h : TCC4 (1) and TCC5 (2)
*in this example */
tc45_enable(&TCC4);
tc45_enable(&TCC5);
/* Configures the interrupt level of CCA and CCB modules of the 2
*Timers: low */
tc45_set_cca_interrupt_level(&TCC4, TC45_INT_LVL_LO);
tc45_set_ccb_interrupt_level(&TCC4, TC45_INT_LVL_LO);
tc45_set_cca_interrupt_level(&TCC5, TC45_INT_LVL_LO);
tc45_set_ccb_interrupt_level(&TCC5, TC45_INT_LVL_LO);
/* Declares the interrupt functions which will be called when CCA and
* CCB
* interrupts will occur */
tc45_set_cca_interrupt_callback(&TCC4,
example_cca_tcc4_interrupt_callback);
tc45_set_ccb_interrupt_callback(&TCC4,
example_ccb_tcc4_interrupt_callback);
tc45_set_cca_interrupt_callback(&TCC5,
example_cca_tcc5_interrupt_callback);
tc45_set_ccb_interrupt_callback(&TCC5,
example_ccb_tcc5_interrupt_callback);
/* Configures the Timer periods*/
tc45_write_period(&TCC4, TIMER_TCC4_PERIOD);
tc45_write_period(&TCC5, TIMER_TCC5_PERIOD);
/* Configures the CCA and CCB levels*/
tc45_write_cc(&TCC4, TC45_CCA, TIMER_TCC4_PERIOD / 2);
tc45_write_cc(&TCC4, TC45_CCB, TIMER_TCC4_PERIOD / 2);
tc45_write_cc(&TCC5, TC45_CCA, TIMER_TCC5_PERIOD / 4);
tc45_write_cc(&TCC5, TC45_CCB, TIMER_TCC5_PERIOD / 4);
/* Enables the CCA and CCB channels*/
tc45_enable_cc_channels(&TCC4, TC45_CCACOMP);
tc45_enable_cc_channels(&TCC4, TC45_CCBCOMP);
tc45_enable_cc_channels(&TCC5, TC45_CCACOMP);
tc45_enable_cc_channels(&TCC5, TC45_CCBCOMP);
/* Configures the waveform genertaor in Dual Slope mode and Top*/
tc45_set_wgm(&TCC4, TC45_WG_DS_T);
tc45_set_wgm(&TCC5, TC45_WG_DS_T);
tc45_set_resolution(&TCC4, TIMER_TCC4_TCC5_RESOLUTION);
tc45_set_resolution(&TCC5, TIMER_TCC4_TCC5_RESOLUTION);
while (1) {
/* Go to sleep, everything is handled by interrupts. */
sleepmgr_enter_sleep();
/* Configures the Output Matrix mode */
if (gpio_pin_is_high(GPIO_PUSH_BUTTON_0)) {
/* button released */
btn_released = true;
continue;
}
/* button pressed */
if (!btn_released) {
/* Wait release of button */
continue;
}
btn_released = false;
/* Change OTMX mode */
otmx_mode_index++;
switch (otmx_mode_index) {
case 0:
tc45_wex_set_otmx(&WEXC, WEX_OTMX_DEFAULT);
break;
case 1:
tc45_wex_set_otmx(&WEXC, WEX_OTMX_1);
break;
case 2:
tc45_wex_set_otmx(&WEXC, WEX_OTMX_2);
break;
case 3:
tc45_wex_set_otmx(&WEXC, WEX_OTMX_3);
break;
case 4:
tc45_wex_set_otmx(&WEXC, WEX_OTMX_4);
break;
default:
otmx_mode_index = -1;
break;
}
}
}
