void Delay_ms(int d)
{
while(d)
{
Delay_us(1000);
__watchdog_reset();
d--;
}
}
static inline void wdt_enable(
int value)
{
__disable_interrupt();
__watchdog_reset();
/* Start timed equence */
WDTCSR |= (1 << WDCE) | (1 << WDE);
/* Set new prescaler(time-out) value = 64K cycles (~0.5 s) */
WDTCSR = (1 << WDE) | (value);
/* we aren't ready to enable interrupts here
__enable_interrupt(); */
}
static inline void wdt_disable(
void)
{
__disable_interrupt();
__watchdog_reset();
/* Clear WDRF in MCUSR */
MCUSR &= ~(1 << WDRF);
/* Write logical one to WDCE and WDE */
/* Keep old prescaler setting to prevent unintentional time-out */
WDTCSR |= (1 << WDCE) | (1 << WDE);
/* Turn off WDT */
WDTCSR = 0x00;
__enable_interrupt();
}
/**
* @brief Initialization of PAL
*
* This function initializes the PAL.
* This includes selecting the proper system clock source, initializing the
* GPIOs, the interface to the transceiver, and the timers.
*
* @return MAC_SUCCESS if PAL initialization is successful, FAILURE otherwise
*/
retval_t pal_init(void)
{
mcu_clock_init();
gpio_init();
trx_interface_init();
#ifdef CW_SUPPORTED
TST_INIT();
#endif
timer_init();
__watchdog_reset();
/* Clear WDRF in MCUSR */
MCUSR &= ~(1<<WDRF);
/* Write logical one to WDCE and WDE */
/* Keep old prescaler setting to prevent unintentional time-out
*/
WDTCSR |= (1<<WDCE) | (1<<WDE);
/* Turn off WDT */
WDTCSR = 0x00;
return MAC_SUCCESS;
}
static inline void wdt_reset(
void)
{
__watchdog_reset();
}
int main(void)
{
//! set the power reduction register to minimize current consumption
init_power_reduction();
//! set CPU clock to 32MHz and enables the DFLL32MHz
clock_init();
//! initialize the LCD module
init_lcd();
//! display all the segments in LCD
lcd_show_all();
//! initialize the GPIO pins
init_ioport();
//! initializes the UART
init_UART();
//! load the calibration data from flash
ADC_CalibrationValues_Load(&ADCA);
//! get the ADC offset value
get_offset();
//! initialize the ADC
init_ADC();
//! load the calibration value from eeprom
init_eeprom();
//! initilize RTC to external clock and 1 sec interrupt
rtc_init();
//! initilize the timer
init_timer();
while(1)
{
//! rtc_flag is set
if (rtc_flag == 1)
{
//! perform the calculation of metering paramters
calculate();
//for debugging
if(cover_open_flag ==1)
PORTD.OUTTGL = PIN3_bm;
//TCC1.CTRLA = ( TCC1.CTRLA & ~TC1_CLKSEL_gm ) | TC_CLKSEL_DIV64_gc;
TCC1.INTCTRLA = (TCC1.INTCTRLA & ~(TC1_OVFINTLVL_gm | TC1_ERRINTLVL_gm))|TC1_OVFINTLVL0_bm;
//! if power on detected
if(power_status_flag == POWER_ON_DETECTED)
{
//! change the clock frequency to 32MHz
CLKSYS_Prescalers_Config( CLK_PSADIV_1_gc, CLK_PSBCDIV_1_1_gc );
//! switch off the battery
PORTD.PIN4CTRL = PORT_OPC_WIREDANDPULL_gc;
//PORTD.OUTSET = PIN4_bm;
//! initialize gpio pins
init_ioport();
//! change the sleep mode to ideal sleep
SLEEP.CTRL = (SLEEP.CTRL & ~SLEEP_SMODE_gm)| SLEEP_SMODE_IDLE_gc;
//! enable ADC & Timer
ADC_Enable(&ADCA);
TCC1.CTRLA = ( TCC1.CTRLA & ~TC1_CLKSEL_gm ) | TC_CLKSEL_DIV64_gc;
//! initialize lcd module
init_lcd();
//! update power status flag
power_status_flag = POWERED_UP;
}
//! update the LCD display
lcd_disp_key();
tamper_check();
if( active_power[0] > max_demand )
{
max_demand = active_power[0];
}
//! check for calibration flag and proceed and call the appropriate calibration funtion
if(calibration_flag != 0)
{
//! checking the calibration flag for calibrating the date & time
if (calibration_flag == 1)
{ calibrate_time_date(); }
//! checking the calibration flag for calibrating the voltage
else if (calibration_flag == 2)
{ calibrate_voltage(); }
//! checking the calibration flag for calculating the offset value
else if (calibration_flag == 3)
{ calibrate_no_load(); }
//! checking the calibration flag for calculating the phase angle variation
else if (calibration_flag == 4)
{ calibrate_phase(); }
//! checking the calibration flag for calculating watt varition
else if (calibration_flag == 5)
{ calibrate_watt(); }
else if (calibration_flag == 6)
//! checking the calibration flag for calibrating the current
{ calibrate_current(); }
}
rtc_flag = 0;
__watchdog_reset();
}
//! checking the power_status, if power off is detected
else if(power_status_flag == POWER_OFF_DETECTED)
{
//! switch on the battery
PORTD.PIN4CTRL = PORT_OPC_WIREDAND_gc;
//PORTD.OUTCLR = PIN4_bm;
//! change the sleep mode to power save mode
SLEEP.CTRL = (SLEEP.CTRL & ~SLEEP_SMODE_gm)| SLEEP_SMODE_PSAVE_gc;
//! switch off the LCD
lcd_command(LCD_COMMAND,0x02);
//! change reset the gpio pin
facilitatePowersaving();
//! disable the ADC
ADC_Disable(&ADCA);
//! disable the timer
TCC1.CTRLA = ( TCC1.CTRLA & ~TC1_CLKSEL_gm ) | TC_CLKSEL_OFF_gc;
//! clear all the varilable used in for energy calculation
meter_flush();
//! reduce the cpu clock frequency to minimize power consumption
CLKSYS_Prescalers_Config( CLK_PSADIV_64_gc, CLK_PSBCDIV_1_1_gc );
//! update power status flag
power_status_flag = POWER_OFF;
__watchdog_reset();
}
//! goes to sleep
SLEEP.CTRL |= SLEEP_SEN_bm;
asm("sleep");
}
}