#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#define F_CPU 14745600UL // 14.7456 MHz
#include <util/delay.h>
#include <stdio.h>
#include <avr/wdt.h>

#define byte_rx 12
#define byte_tx 12
#define sig1_on PORTD &= ~(1<<4)
#define sig1_off PORTD |= (1<<4)
#define sig2_on PORTD &= ~(1<<5)
#define sig2_off PORTD |= (1<<5)
#define sig3_on PORTD &= ~(1<<6)
#define sig3_off PORTD |= (1<<6)
#define sig4_on PORTD &= ~(1<<7)
#define sig4_off PORTD |= (1<<7)
#define _rx PORTC &= ~(1<<5)
#define _tx PORTC |= (1<<5)
#define address 1
#define level 45

unsigned char u_data;
volatile unsigned char buf_rx[12];
volatile unsigned char buf_tx[12];
//volatile unsigned char buf_x[12];
volatile unsigned char n;
volatile unsigned char alarm;
volatile unsigned int adc_data;
volatile unsigned int _adc_data;
volatile unsigned int delta;
volatile unsigned char crc_ok;
volatile unsigned char __crc;
volatile unsigned char timer;
volatile unsigned char _usart;
volatile unsigned char comp;
volatile unsigned char crc;

volatile const unsigned char Crc8Table[256] = {
    0x00, 0x31, 0x62, 0x53, 0xC4, 0xF5, 0xA6, 0x97,
    0xB9, 0x88, 0xDB, 0xEA, 0x7D, 0x4C, 0x1F, 0x2E,
    0x43, 0x72, 0x21, 0x10, 0x87, 0xB6, 0xE5, 0xD4,
    0xFA, 0xCB, 0x98, 0xA9, 0x3E, 0x0F, 0x5C, 0x6D,
    0x86, 0xB7, 0xE4, 0xD5, 0x42, 0x73, 0x20, 0x11,
    0x3F, 0x0E, 0x5D, 0x6C, 0xFB, 0xCA, 0x99, 0xA8,
    0xC5, 0xF4, 0xA7, 0x96, 0x01, 0x30, 0x63, 0x52,
    0x7C, 0x4D, 0x1E, 0x2F, 0xB8, 0x89, 0xDA, 0xEB,
    0x3D, 0x0C, 0x5F, 0x6E, 0xF9, 0xC8, 0x9B, 0xAA,
    0x84, 0xB5, 0xE6, 0xD7, 0x40, 0x71, 0x22, 0x13,
    0x7E, 0x4F, 0x1C, 0x2D, 0xBA, 0x8B, 0xD8, 0xE9,
    0xC7, 0xF6, 0xA5, 0x94, 0x03, 0x32, 0x61, 0x50,
    0xBB, 0x8A, 0xD9, 0xE8, 0x7F, 0x4E, 0x1D, 0x2C,
    0x02, 0x33, 0x60, 0x51, 0xC6, 0xF7, 0xA4, 0x95,
    0xF8, 0xC9, 0x9A, 0xAB, 0x3C, 0x0D, 0x5E, 0x6F,
    0x41, 0x70, 0x23, 0x12, 0x85, 0xB4, 0xE7, 0xD6,
    0x7A, 0x4B, 0x18, 0x29, 0xBE, 0x8F, 0xDC, 0xED,
    0xC3, 0xF2, 0xA1, 0x90, 0x07, 0x36, 0x65, 0x54,
    0x39, 0x08, 0x5B, 0x6A, 0xFD, 0xCC, 0x9F, 0xAE,
    0x80, 0xB1, 0xE2, 0xD3, 0x44, 0x75, 0x26, 0x17,
    0xFC, 0xCD, 0x9E, 0xAF, 0x38, 0x09, 0x5A, 0x6B,
    0x45, 0x74, 0x27, 0x16, 0x81, 0xB0, 0xE3, 0xD2,
    0xBF, 0x8E, 0xDD, 0xEC, 0x7B, 0x4A, 0x19, 0x28,
    0x06, 0x37, 0x64, 0x55, 0xC2, 0xF3, 0xA0, 0x91,
    0x47, 0x76, 0x25, 0x14, 0x83, 0xB2, 0xE1, 0xD0,
    0xFE, 0xCF, 0x9C, 0xAD, 0x3A, 0x0B, 0x58, 0x69,
    0x04, 0x35, 0x66, 0x57, 0xC0, 0xF1, 0xA2, 0x93,
    0xBD, 0x8C, 0xDF, 0xEE, 0x79, 0x48, 0x1B, 0x2A,
    0xC1, 0xF0, 0xA3, 0x92, 0x05, 0x34, 0x67, 0x56,
    0x78, 0x49, 0x1A, 0x2B, 0xBC, 0x8D, 0xDE, 0xEF,
    0x82, 0xB3, 0xE0, 0xD1, 0x46, 0x77, 0x24, 0x15,
    0x3B, 0x0A, 0x59, 0x68, 0xFF, 0xCE, 0x9D, 0xAC};

unsigned char Crc8(unsigned char *buf, unsigned char len)
{
    crc=0xFF;
    while (len--) {
      crc = Crc8Table[crc ^ *buf++];}
    return crc;
}

void USART_Transmit( unsigned char data )
{
while (!(UCSR0A & (1<<5)));
UDR0 = data;
}

ISR(USART_RX_vect)
{
//
wdt_reset();
sig3_on;
u_data=UDR0;
buf_rx[n]=u_data;
if(u_data==0xF0){n=0; buf_rx[n]=u_data;}
n++;
if((n==byte_rx)&(buf_rx[1]==0x22))
    {
    __crc=Crc8((unsigned char*)buf_rx,(byte_rx-1));
    if(__crc==buf_rx[(byte_rx-1)])
           {
           sig2_on;            
        _tx;
        _delay_us(100);
           buf_tx[0]=0xF0;
        buf_tx[1]=0x10;
        buf_tx[2]=0x00;
        buf_tx[3]=0x10;
        buf_tx[4]=0x00;
        buf_tx[5]=0x10;
        buf_tx[6]=0x00;
        buf_tx[7]=0x10;
        buf_tx[8]=0x02;
        buf_tx[9]=0x10;
        buf_tx[10]=0x00;
        buf_tx[(byte_tx-1)]=Crc8((unsigned char*)buf_tx,(byte_tx-1));
        for(unsigned char i=0;i<byte_tx;i++){USART_Transmit(buf_tx[i]);}
        _delay_us(350);
        _rx;
        }
        else {sig2_off;}
    }
sig3_off;
}

/***************************************************************/
int main(void)
{
DDRB=0b00111111;
PORTB=0b00000111;
DDRC=0b11111111;
PORTC=0b00000000;
DDRD=0b11110011;
PORTD=0b11111100;

UBRR0H = 0;/*Set baud rate */
UBRR0L = 23;
UCSR0B = 0b10011000;/* Enable receiver and transmitter */
UCSR0C = 0b00001110;/* Set frame format: 8data, 2stop bit */
//wdt_enable(WDTO_120MS);
_rx;
asm("sei");

while(1)
    {
    asm("nop");

    }//while
return 0;
}//main