https://www.basic4mcu.com/bbs/board.php?bo_table=gesiyo13&wr_id=189&sca=%EB%B9%84%EC%A0%91%EC%B4%89%EC%98%A8%EB%8F%84%EC%84%BC%EC%84%9C 
 
이 코드를 참고하여 적외선센서 작동을위해
avrstudio4 + WINAVR +hyperterminal로 확인하려하는데 
 
다음과같이 코드를 수정하였는데 값도 안나오고 문자열 출력도 안되네요.. 어느부분이 문제인지알수있을까요? 
 
#include <avr/io.h>
#include <util/delay.h>
#include <stdio.h>
//
#define U_C  unsigned char
#define U_I  unsigned int
#define U_L  unsigned long
//==============================================================================================
 
 
#define ss_delay _delay_us(15)
#define ck_delay _delay_us(5)
//==============================================================================================
void SPI_WR(U_C d) {
	U_C i;
	PORTB &= 0xFE; ss_delay;
	for (i = 0; i < 8; i++) {
		if (d & (0x80 >> i)) PORTB |= 0x01; else PORTB &= 0xFB;
		PORTB &= 0xFD; ck_delay; PORTB |= 0x02; ck_delay;
	}
	PORTB |= 0x01;
	_delay_ms(10);
}
int SPI_RD(void) {
	U_C i;
	int tp = 0;
	PORTB &= 0xFE; ss_delay;
	for (i = 0; i < 8; i++) {
		PORTB &= 0xFD; ck_delay;
		if (PINB & 0x03)tp |= 0x80 >> i;
		PORTB |= 0x02; ck_delay;
	}
	PORTB |= 0x01;
	_delay_ms(10);
	return tp;
}
//==============================================================================================
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
//==============================================================================================
void main(void) {
	char str[50];
	int Target, Ambient;
	float f_t, f_a;
	PORTB = 3; DDRB = 7; // SS & SCK 초기값 high
	UCSR1B = 8; UBRR1L = 103;
	while (1) {
		SPI_WR(0xA0);
		Target = SPI_RD();  //low
		Target |= SPI_RD() << 8;  //high
		f_t = (float)Target;
		f_t /= 100.0;
		_delay_ms(50);
		//
		SPI_WR(0xA1);
		Ambient = SPI_RD();  //low
		Ambient |= SPI_RD() << 8;  //high
		f_a = (float)Ambient;
		f_a /= 100.0;
		_delay_ms(500);
		//sprintf(str,"Target=%6d, Ambient=%6d  \r",Target,Ambient);
		sprintf(str, "Target=%7.2f, Ambient=%7.2f  \r", f_t, f_a);
		TX1_STR(str);
	}
}