#include<stdio.h> //빌드완료 
#include <avr/io.h>
#include <avr/interrupt.h>
#define F_CPU 16000000UL
#include <util/delay.h>
#define USART_BAUDRATE 19200
 
#define UBRR_VALUE (((F_CPU / (USART_BAUDRATE * 16UL))) - 1)
 
 
 
#define U_C  unsigned char
#define U_I  unsigned int
#define U_L  unsigned long
volatile uint8_t Timer1_Flag = 0;            // Timer1 flag
volatile uint8_t RX_CNT;
uint8_t TX_BUF[8], RX_BUF[13];
uint16_t crc16, au16regs[4];
float RawData, CompData, SensData;
 
void TX1_CH(U_C ch) { while (!(UCSR1A & 0x20)); UDR1 = ch; } // 송신 1바이트
void TX1_STR(U_C* str) { while (*str)TX1_CH(*str++); }  // 문자열 송신함수
//
ISR(USART1_RX_vect)
{
	RX_BUF[RX_CNT++];
}
void USART1_Init(long baud)
{
	
		//3. UBRR0은 16비트 레지스터이기 때문에 8비트씩 나누어서 넣어야 한다.
		UBRR1H = (uint8_t)(UBRR_VALUE >> 8);
		UBRR1L = (uint8_t)UBRR_VALUE;
 
		//4. USART 설정
		UCSR1C |= (1 << UCSZ10) | (1 << UCSZ11); //Charecter size : 8비트
		UCSR1C &= ~(1 << USBS1); //stop  bit : 1비트
		UCSR1C &= ~((1 << UPM11) | (1 << UPM10)); // no parity mode
 
		UCSR1B = 0b10011000; //enable interrupt
	
	
}
 
 
ISR(TIMER1_OVF_vect) {        // interrupt service routine : interval 100ms
	TCNT1 = 59286;              //  65536-16MHz/256/10Hz = 65536 - 16000000/256/10Hz = 59286
	Timer1_Flag = 1;
}
void Timer1_Init(void) { //avr 레지스터 확인 필요
 
 
	TCNT1 = 0;
	TCCR1A = 0;
	TCCR1B = 0;
 
	TCNT1 = 59286;            // preload timer 65536-16MHz/256/10Hz = 65536 - 16000000/256/10 = 59286
	TCCR1B |= (1 << CS12);    // 256 prescaler 
	TIMSK |= (1 << TOIE1);   // enable timer overflow interrupt
 
}
 
uint16_t CalcCRC16(uint8_t * cdata, uint16_t ilen) {
	uint16_t AccumCRC16 = 0xffff;
	uint8_t i, j;
	for (j = 0; j < ilen; j++) {
		i = (AccumCRC16 ^ *(cdata++)) & 255;
		AccumCRC16 = ((AccumCRC16 >> 8) ^ TableCRC16[i]) & 0xffff;
	}
	return AccumCRC16;
}
uint8_t highByte(uint16_t Data)
{
	return (Data >> 8) & 0xFF;
}
 
uint8_t lowByte(uint16_t Data)
{
	return Data & 0xFF;
}
 
int8_t query(void) {
	uint8_t i;
	TX_BUF[0] = 0x01;
	TX_BUF[1] = 0x03;
	TX_BUF[2] = 0x00;
	TX_BUF[3] = 0x01;
	TX_BUF[4] = 0x00;
	TX_BUF[5] = 0x04;
	crc16 = CalcCRC16(TX_BUF, 6);
	TX_BUF[6] = lowByte(crc16);
	TX_BUF[7] = highByte(crc16);
 
	for (i = 0; i < 8; i++) {
		TX1_CH(TX_BUF[i]);
		
	}
}
 
int main()
{
	DDRG = 0x03;
	USART1_Init(19200);
	Timer1_Init();
	sei();
 
	while (1) {
		if (Timer1_Flag) {
			Timer1_Flag = 0;
			RX_CNT = 0;  //응답을 기다림 수신버퍼 비우기 
			query();                        // send query : 100ms cycle          
			
		}
 
		
		if (RX_CNT == 13) // mySerial.available 역할?
		{
		//char ch = RX_BUF[RX_CNT++];  //헷갈림 serial.read역할?
 
 
			//특정 RX_BUF위치 값으로 센서값 변환
			
		crc16 = CalcCRC16(RX_BUF, 11);			// CRC calculation.
 
				if (crc16 == (RX_BUF[11] | RX_BUF[12] << 8)) {	// CRC verification.
					au16regs[0] = (uint16_t)RX_BUF[3] << 8 | (uint16_t)RX_BUF[4];
					au16regs[1] = (uint16_t)RX_BUF[5] << 8 | (uint16_t)RX_BUF[6];
					au16regs[2] = (uint16_t)RX_BUF[7] << 8 | (uint16_t)RX_BUF[8];
					au16regs[3] = (uint16_t)RX_BUF[9] << 8 | (uint16_t)RX_BUF[10];
					RawData = (float)au16regs[0] * 0.02 - 273.15; // DataValue1 : Raw Temperature
					CompData = (float)au16regs[1] * 0.02 - 273.15;// DataValue2 : Comp Temperature
					//dummy = (float)au16regs[2]*0.02-273.15; // DataValue3 : reserved(not used)
					SensData = (float)au16regs[3] * 0.02 - 273.15;// DataValue4 : Sensor package Temperature (Operating temperature)
					if (CompData > 20) PORTG ^= 0x03;
				}
 
				RX_CNT = 0;
 
 
				
			}
		} 
		
 
	}
 
	return 0;
}
 
다른곳은 PORTG LED를 통해 확인을 완료했는데 crc체크하는 부분ㅡ> 	if (crc16 == (RX_BUF[11] | RX_BUF[12] << 8)) {	// CRC verification.
이 안쪽에 들어가질 않는거같은데.. 저쪽에 PORTG는 작동하지않아서요.
 
혹시 잘못된곳을 확인할수 있을까요??