/*******************************************************
Chip type               : ATtiny85
AVR Core Clock frequency: 1,000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 128
не смог запустить АЦП :(
*******************************************************/
#include <delay.h>
#include <tiny85.h>
#include <sleep.h>

#define led_pin PORTB0          // сигнал "я жду"
#define sensor_on PORTB1        // включение питания сенсора
#define sensor PORTB3           // данные сенсора
#define motor_on PORTB2            // помпа
#define led_tmp PORTB4            // для отладки

#define NextTime 1      // сколько интервалов (8сек + мигание светиком) ждать 24часа=10732

// Voltage Reference: AVCC pin
// Выбран вход PB3
#define ADC_VREF_TYPE ((0<<REFS1) | (0<<REFS0) | (0<<REFS2) | (0<<ADLAR) | (0<<MUX3) | (0<<MUX2) | (1<<MUX1) | (1<<MUX0))

unsigned int kw;
unsigned int adc_data;

// ADC interrupt service routine
interrupt [ADC_INT] void adc_isr(void)
{
// Read the AD conversion result
adc_data=ADCW;

}

// Watchdog timeout interrupt service routine
interrupt [WDT] void wdt_timeout_isr(void)
{
    sleep_disable();
}

void main(void)
{
// Declare your local variables here

// Crystal Oscillator division factor: 8
#pragma optsize-
CLKPR=(1<<CLKPCE);
CLKPR=(0<<CLKPCE) | (0<<CLKPS3) | (0<<CLKPS2) | (1<<CLKPS1) | (1<<CLKPS0);
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

// Input/Output Ports initialization
// Port B initialization
// Function: Bit5=In Bit4=In Bit3=In Bit2=Out Bit1=Out Bit0=Out 
DDRB=(0<<DDB5) | (0<<DDB4) | (0<<DDB3) | (1<<DDB2) | (1<<DDB1) | (1<<DDB0);
// State: Bit5=T Bit4=T Bit3=T Bit2=0 Bit1=0 Bit0=0 
PORTB=(0<<PORTB5) | (0<<PORTB4) | (0<<PORTB3) | (0<<PORTB2) | (0<<PORTB1) | (0<<PORTB0);

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0A output: Disconnected
// OC0B output: Disconnected
TCCR0A=(0<<COM0A1) | (0<<COM0A0) | (0<<COM0B1) | (0<<COM0B0) | (0<<WGM01) | (0<<WGM00);
TCCR0B=(0<<WGM02) | (0<<CS02) | (0<<CS01) | (0<<CS00);
TCNT0=0x00;
OCR0A=0x00;
OCR0B=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFF
// OC1A output: Disconnected
// OC1B output: Disconnected
// Timer1 Overflow Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
PLLCSR=(0<<PCKE) | (0<<PLLE) | (0<<PLOCK);

TCCR1=(0<<CTC1) | (0<<PWM1A) | (0<<COM1A1) | (0<<COM1A0) | (0<<CS13) | (0<<CS12) | (0<<CS11) | (0<<CS10);
GTCCR=(0<<TSM) | (0<<PWM1B) | (0<<COM1B1) | (0<<COM1B0) | (0<<PSR1) | (0<<PSR0);
TCNT1=0x00;
OCR1A=0x00;
OCR1B=0x00;
OCR1C=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=(0<<OCIE1A) | (0<<OCIE1B) | (0<<OCIE0A) | (0<<OCIE0B) | (0<<TOIE1) | (0<<TOIE0);

// External Interrupt(s) initialization
// INT0: Off
// Interrupt on any change on pins PCINT0-5: Off
GIMSK=(0<<INT0) | (0<<PCIE);
MCUCR=(0<<ISC01) | (0<<ISC00);

// USI initialization
// Mode: Disabled
// Clock source: Register & Counter=no clk.
// USI Counter Overflow Interrupt: Off
USICR=(0<<USISIE) | (0<<USIOIE) | (0<<USIWM1) | (0<<USIWM0) | (0<<USICS1) | (0<<USICS0) | (0<<USICLK) | (0<<USITC);

// Analog Comparator initialization
// Analog Comparator: Off
// The Analog Comparator's positive input is
// connected to the AIN0 pin
// The Analog Comparator's negative input is
// connected to the AIN1 pin
ACSR=(1<<ACD) | (0<<ACBG) | (0<<ACO) | (0<<ACI) | (0<<ACIE) | (0<<ACIS1) | (0<<ACIS0);
ADCSRB=(0<<ACME);
// Digital input buffer on AIN0: On
// Digital input buffer on AIN1: On
DIDR0=(0<<AIN0D) | (0<<AIN1D);

// ADC initialization
// ADC Clock frequency: 125,000 kHz
// ADC Voltage Reference: AVCC pin
// ADC Bipolar Input Mode: Off
// ADC Reverse Input Polarity: Off
// ADC Auto Trigger Source: ADC Stopped
// Digital input buffers on ADC0: Off, ADC1: Off, ADC2: Off, ADC3: On
DIDR0|=(1<<ADC0D) | (1<<ADC2D) | (0<<ADC3D) | (1<<ADC1D);
ADMUX=ADC_VREF_TYPE;
ADCSRA=(1<<ADEN) | (0<<ADSC) | (0<<ADATE) | (0<<ADIF) | (1<<ADIE) | (0<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
ADCSRB=(0<<BIN) | (0<<IPR) | (0<<ADTS2) | (0<<ADTS1) | (0<<ADTS0);

// Watchdog Timer initialization
// Watchdog Timer Prescaler: OSC/1024k
// Watchdog timeout action: Interrupt
#pragma optsize-
WDTCR=(0<<WDIF) | (0<<WDIE) | (1<<WDP3) | (1<<WDCE) | (0<<WDE) | (0<<WDP2) | (0<<WDP1) | (1<<WDP0);
WDTCR=(1<<WDIF) | (1<<WDIE) | (1<<WDP3) | (0<<WDCE) | (0<<WDE) | (0<<WDP2) | (0<<WDP1) | (1<<WDP0);
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

#asm("sei")
PORTB&=~(1<<motor_on);
PORTB&=~(1<<sensor_on);
PORTB&=~(1<<led_pin);
PORTB&=~(1<<led_tmp);

while (1)
      {
        adc_data=0;
        // начать новое АЦ преобразование
        PORTB|=(1<<sensor_on);          // влючаю питание сенсора
        ADCSRA|=0x40;
        while (adc_data){}              // жду готовности ADC 
        if (adc_data>0)
        {
            // земля сухая, надо полить
            PORTB|=(1<<motor_on);       // включаю помпу
            delay_ms(3000);
            PORTB&=~(1<<motor_on);      // выключаю помпу            
        }
        PORTB&=~(1<<sensor_on);          // вылючаю питание сенсора
        for (kw=0; kw<NextTime; kw++)
        {
            PORTB^=(1<<led_pin);
            delay_ms(50);
            PORTB^=(1<<led_pin);
            sleep_enable();
            powerdown();
        }        
      }
}