/*******************************************************
Chip type               : ATtiny85
AVR Core Clock frequency: 8,000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 128
*******************************************************/
#include <stdio.h>
#include <io.h>

#include "max7219.h"
#include "max7219.c"

#include <delay.h>
#include <tiny85.h>
#define led_pin0 PORTB0
#define led_pin1 PORTB1
#define led_pin2 PORTB2
#define led_pin3 PORTB4

// Voltage Reference: AVCC pin
// Выбран вход PB3, выравнивание по левому краю старшего байта, на младший забиваем
#define ADC_VREF_TYPE ((0<<REFS1) | (0<<REFS0) | (0<<REFS2) | (1<<ADLAR) | (0<<MUX3) | (0<<MUX2) | (1<<MUX1) | (1<<MUX0))

unsigned int adc_data;
unsigned char adc_l, adc_h, gotovo;

// ADC interrupt service routine
interrupt [ADC_INT] void adc_isr(void)
{
// Read the AD conversion result
adc_data=ADCW;
adc_h=ADCH;
adc_l=ADCL;
gotovo=1;
}

void main(void)
{
// Declare your local variables here
unsigned int ic,i,j;

// Crystal Oscillator division factor: 1
#pragma optsize-
CLKPR=(1<<CLKPCE);
CLKPR=(0<<CLKPCE) | (0<<CLKPS3) | (0<<CLKPS2) | (0<<CLKPS1) | (0<<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=(1<<PORTB5) | (1<<PORTB4) | (1<<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: 62,500 kHz
// ADC Voltage Reference: AVCC pin
// ADC Bipolar Input Mode: Off
// ADC Reverse Input Polarity: Off
// ADC Auto Trigger Source: Free Running
// 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) | (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
ADCSRB=(0<<BIN) | (0<<IPR) | (0<<ADTS2) | (0<<ADTS1) | (0<<ADTS0);

// Global enable interrupts
#asm("sei")

	max7219_init();

	//init ic
	for(ic=0; ic<MAX7219_ICNUMBER; ic++) {
		max7219_shutdown(ic, 1); //power on
		max7219_test(ic, 0); //test mode off
		max7219_decode(ic, 0); //use led matrix
		max7219_intensity(ic, 5); //intensity
		max7219_scanlimit(ic, 7);
	}

    //clear
	for(ic=0; ic<MAX7219_ICNUMBER; ic++) {
		for(i=1; i<9; i++) {
			for(j=0; j<8; j++) {
				max7219_send(ic, i, 0);
			}
		}
	}
gotovo=0;
while (1)
      {
        // начать новое АЦ преобразование
        ADCSRA|=(1<<ADSC);
        while (gotovo==0){}              // жду готовности ADC 
        max7219_send(0,1,adc_l);
        max7219_send(0,2,adc_h);
        delay_ms(500);
        gotovo=0;
}
}