/**
* \b avrInitSystemTickTimer
*
* Initialise the system tick timer. Uses the AVR's timer1 facility.
*
* @return None
*/
void avrInitSystemTickTimer ( void )
{
/*
* Unmask clock for TCC1
*/
tc_enable(&TCC1);
/*
* Configure interrupts callback functions for CCA interrupt
*/
tc_set_cca_interrupt_callback(&TCC1,
cca_interrupt_callback);
/*
* Configure TC in normal mode, configure period, CCA
* Enable CCA channel
*/
tc_set_wgm(&TCC1, TC_WG_NORMAL);
tc_write_period(&TCC1, AVR_CPU_HZ / 256 / SYSTEM_TICKS_PER_SEC);
tc_write_cc(&TCC1, TC_CCA, AVR_CPU_HZ / 256 / SYSTEM_TICKS_PER_SEC / 2);
tc_enable_cc_channels(&TCC1,(enum tc_cc_channel_mask_enable_t)(TC_CCAEN));
/*
* Enable TC interrupts (overflow, CCA and CCB)
*/
tc_set_cca_interrupt_level(&TCC1, TC_CCAINTLVL_LO_gc);
/*
* Run TCC1 at AVR_CPU_HZ / 256
*/
tc_write_clock_source(&TCC1, TC_CLKSEL_DIV256_gc);
}
/*! \brief to initialiaze hw timer
*/
uint8_t tmr_init(void)
{
uint8_t timer_multiplier;
tc_enable(TIMER);
tc_set_overflow_interrupt_callback(TIMER,
(tc_callback_t)tc_ovf_callback);
/*initialize timer in waveform generator - Normal mode */
tc_set_wgm(TIMER, TC_WG_NORMAL);
tc_write_period(TIMER, TIMER_PERIOD);
/* select clock division as 1 */
tc_write_clock_source(TIMER, TC_CLKSEL_DIV1_gc);
tc_set_overflow_interrupt_level(TIMER, TC_INT_LVL_HI);
tc_set_cca_interrupt_callback(TIMER, (tc_callback_t)tc_cca_callback);
tc_enable_cc_channels(TIMER, TC_CCAEN);
tc_set_cca_interrupt_level(TIMER, TC_INT_LVL_OFF);
/* calculate how faster the timer with current clk freq compared to
* timer with 1Mhz */
timer_multiplier = sysclk_get_peripheral_bus_hz(TIMER) / DEF_1MHZ;
return timer_multiplier;
}
int main(void)
{
pmic_init();
board_init();
sysclk_init();
sleepmgr_init();
cpu_irq_enable();
#if (BOARD == XMEGA_A3BU_XPLAINED)
/* The status LED must be used as LED2, so we turn off
* the green led which is in the same packaging. */
ioport_set_pin_high(LED3_GPIO);
#endif
/*
* Unmask clock for TIMER_EXAMPLE
*/
tc_enable(&TIMER_EXAMPLE);
/*
* Configure interrupts callback functions for TIMER_EXAMPLE
* overflow interrupt, CCA interrupt and CCB interrupt
*/
tc_set_overflow_interrupt_callback(&TIMER_EXAMPLE,
example_ovf_interrupt_callback);
tc_set_cca_interrupt_callback(&TIMER_EXAMPLE,
example_cca_interrupt_callback);
tc_set_ccb_interrupt_callback(&TIMER_EXAMPLE,
example_ccb_interrupt_callback);
/*
* Configure TC in normal mode, configure period, CCA and CCB
* Enable both CCA and CCB channels
*/
tc_set_wgm(&TIMER_EXAMPLE, TC_WG_NORMAL);
tc_write_period(&TIMER_EXAMPLE, TIMER_EXAMPLE_PERIOD);
tc_write_cc(&TIMER_EXAMPLE, TC_CCA, TIMER_EXAMPLE_PERIOD / 2);
tc_write_cc(&TIMER_EXAMPLE, TC_CCB, TIMER_EXAMPLE_PERIOD / 4);
tc_enable_cc_channels(&TIMER_EXAMPLE,(enum tc_cc_channel_mask_enable_t)(TC_CCAEN | TC_CCBEN));
/*
* Enable TC interrupts (overflow, CCA and CCB)
*/
tc_set_overflow_interrupt_level(&TIMER_EXAMPLE, TC_INT_LVL_LO);
tc_set_cca_interrupt_level(&TIMER_EXAMPLE, TC_INT_LVL_LO);
tc_set_ccb_interrupt_level(&TIMER_EXAMPLE, TC_INT_LVL_LO);
/*
* Run TIMER_EXAMPLE at TIMER_EXAMPLE_PERIOD(31250Hz) resolution
*/
tc_set_resolution(&TIMER_EXAMPLE, TIMER_EXAMPLE_PERIOD);
do {
/* Go to sleep, everything is handled by interrupts. */
sleepmgr_enter_sleep();
} while (1);
}
static void init_timer_isr(void)
{
tc_enable(&TCC0);
tc_write_period(&TCC0, TIMER_PERIOD);
tc_write_clock_source(&TCC0, TC_CLKSEL_DIV8_gc);
tc_set_cca_interrupt_level(&TCC0, PMIC_LVL_LOW);
tc_set_cca_interrupt_callback(&TCC0, example_cca_interrupt_callback);
}
void init_timer_isr( void )
{
tc_enable (&TCC0);
tc_write_period (&TCC0, (TICKS_PER_MS * qt_measurement_period_msec));
tc_write_clock_source (&TCC0, TC_CLKSEL_DIV8_gc);
tc_set_cca_interrupt_level (&TCC0, PMIC_LVL_LOW);
tc_set_cca_interrupt_callback(&TCC0, example_cca_interrupt_callback);
}
void app_touch_init(void)
{
#ifdef QTOUCH_STUDIO_MASKS
SNS_array[0][0] = 0x50;
SNS_array[0][1] = 0x00;
SNS_array[1][0] = 0x00;
SNS_array[1][1] = 0x00;
SNSK_array[0][0] = 0xA0;
SNSK_array[0][1] = 0x00;
SNSK_array[1][0] = 0x00;
SNSK_array[1][1] = 0x00;
#endif
/* Configures the sensors as keys and assigns the channel numbers.
* The sensor is wired up with SNS=PF6 and SNSK=PF7
* When using "pin reconfigurability" this will result in channel 0
* because it is the first and only channel that is used.
* For the standard qtouch library setup we would need to use
* channel 3 since we are using the last two pins on the port.
*/
qt_enable_key(CHANNEL_0, NO_AKS_GROUP, 10u, HYST_6_25);
qt_enable_key(CHANNEL_1, NO_AKS_GROUP, 10u, HYST_6_25);
qt_init_sensing();
/* This will fill the default threshold values in the configuration
* data structure. But User can change the values of these parameters.
*/
qt_config_data.qt_di = DEF_QT_DI;
qt_config_data.qt_neg_drift_rate = DEF_QT_NEG_DRIFT_RATE;
qt_config_data.qt_pos_drift_rate = DEF_QT_POS_DRIFT_RATE;
qt_config_data.qt_max_on_duration = DEF_QT_MAX_ON_DURATION;
qt_config_data.qt_drift_hold_time = DEF_QT_DRIFT_HOLD_TIME;
qt_config_data.qt_recal_threshold = DEF_QT_RECAL_THRESHOLD;
qt_config_data.qt_pos_recal_delay = DEF_QT_POS_RECAL_DELAY;
/* Initialize the timer counter */
tc_enable(&TCC0);
tc_write_period(&TCC0, TIMER_PERIOD);
tc_write_clock_source(&TCC0, TC_CLKSEL_DIV8_gc);
tc_set_cca_interrupt_level(&TCC0, PMIC_LVL_LOW);
tc_set_cca_interrupt_callback(&TCC0, app_touch_tc_interrupt_callback);
/*
* Set up callback function. This function is called after the library
* has made capacitive measurements, but before it has processed them.
* The user can use this hook to apply filter functions to the measured
* signal values.(Possibly to fix sensor layout faults)
*/
qt_filter_callback = NULL;
#ifdef _DEBUG_INTERFACE_
QDebug_Init();
#endif
sleepmgr_lock_mode(SLEEPMGR_IDLE);
}
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);
}
static void init_timer_isr( void )
{
tc_enable(&TCD0);
/* We divide the peripheral 2MHz clock by 2 to get 1MHz*/
tc_write_clock_source(&TCD0, TC_CLKSEL_DIV2_gc);
/* Set Compare A interrupt to low level */
tc_set_cca_interrupt_level(&TCD0, TC_INT_LVL_LO);
/* 1000 counts is 1ms at 1MHz input clock */
tc_write_period (&TCD0, 1000 * qt_measurement_period_msec);
/* Handling callback */
tc_set_cca_interrupt_callback(&TCD0, touch_timer_callback);
/* Enable CCA */
tc_enable_cc_channels(&TCD0, TC_CCAEN);
}