/*****************************************************
This program was produced by the
CodeWizardAVR V1.25.5 Professional

Chip type           : ATmega16
Program type        : Application
Clock frequency     : 16,000000 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 256
*****************************************************/

#include <mega16.h>  
#include <stdio.h>  

bit tmrs;
unsigned char z,itr, stbit;  
unsigned char constbyte, constbyte_;
unsigned char command, command_;

#define tmr_on {TCCR0=0x05; tmrs=1;}
#define tmr_off {TCCR0=0x00; tmrs=0;}

char i = 0;
char rc_buf[33];

void clr(void)
{
tmr_off;
for(i=0; i<34; i++)rc_buf[i]=0;
z=0;
itr=0; 
stbit=0;
}

void vivod(void)
{  
constbyte=0;
constbyte_=0;
command=0;
command_=0;

for(i=0; i<8; i++)
{
constbyte|=rc_buf[i+1]<<i;
constbyte_|=rc_buf[i+9]<<i;  
command|=rc_buf[i+17]<<i;
command_|=rc_buf[i+25]<<i;
}  
if((constbyte==~constbyte_)&&(command==~command_))
{
printf("%X %X %u %u",constbyte,constbyte_,command,command_); 
putsf("\r"); 
}
}

// External Interrupt 0 service routine
interrupt [EXT_INT0] void ext_int0_isr(void)
{
itr++;
if (tmrs){  
if (stbit==0){
stbit=1;
if ((TCNT0<139)||(TCNT0>141)) {clr(); return;}
}
if(itr&0x01) {
rc_buf[z]=((TCNT0>=25)&&(TCNT0<=27));
z++; 
}}
else tmr_on; 
if(z==33){

vivod();
clr();
}
TCNT0=0;
}

// Timer 1 overflow interrupt service routine
interrupt [TIM0_OVF] void timer0_ovf_isr(void)
{ 
clr();  
}

// Declare your global variables here

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

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x04;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: 2000,000 kHz
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: On
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: On
// INT0 Mode: Any change
// INT1: Off
// INT2: Off
GICR|=0x40;
MCUCR=0x01;
MCUCSR=0x00;
GIFR=0x40;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: Off
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud Rate: 38400
UCSRA=0x00;
UCSRB=0x08;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x19;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x01;//4;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

tmrs=0;
stbit=0;
z=0;
itr=0;

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

while (1)
      {
      // Place your code here

      };
}