MRF49XA, IRQ в момент передачи постоянно в 0

#include <avr/io.h>
#include <util/delay.h>
int temp;

#define CS_0 PORTD&=~(1<<5)
#define CS_1 PORTD|=(1<<5)
#define SCK_0 PORTD&=~(1<<4)
#define SCK_1 PORTD|=(1<<4)
#define SDI_0 PORTD&=~(1<<3)
#define SDI_1 PORTD|=(1<<3)

const long    GENCREG       = 0b10000000;   //  00111000    915 mHz, 12,5pf
const long    PMCREG       = 0b10000010;   //  00000000;   CLK-onn - 00001000  // Все Офф
const long    RXCREG       = 0b10010100;   //  10111001    134kHz, 97dBm, fast
const long    TXBREG       = 0b10111000;   //  DATA
const long    FIFORSTREG   = 0b11001010;   //  10000001      8bits, risit 0.2 v
const long    BBFCREG       = 0b11000010;   //  00101100  default
const long    AFCCREG      = 0b11000100;   //  11010111;   default
const long    CFSREG       = 0b10100111;   //  11010000  915.000MHz (default)
const long    TXCREG      = 0b10011000;   //  01000111  130 kHz, max power
const long    DRSREG       = 0b11000110;   //  00100011;   default

void SPI_Write(unsykned char spidata)
{
char i;

SDI_0;
SCK_0;
for (i=0;i<8;i=i+1)
{
if(spidata & 0x80){
SDI_1;}
else
{SDI_0;}

SCK_1;
SCK_0;
spidata=spidata<<1;
}
SDI_1;
}

void init(){

CS_0;  SPI_Write(FIFORSTREG); SPI_Write(0b10000001);  CS_1;
CS_0;  SPI_Write(FIFORSTREG); SPI_Write(0b10000011);  CS_1; // Enable symshro FIFORSTREG
CS_0;  SPI_Write(GENCREG);    SPI_Write(0b00111000);  CS_1;
CS_0;  SPI_Write(AFCCREG);    SPI_Write(0b11010111);  CS_1;   // AFCCREG ???
CS_0;  SPI_Write(CFSREG);     SPI_Write(0b11010000);  CS_1;  //915  ???
CS_0;  SPI_Write(DRSREG);     SPI_Write(0b00100011);  CS_1;
CS_0;  SPI_Write(PMCREG);     SPI_Write(0b00000000);  CS_1; // PMCREG Receive/transiver
CS_0;  SPI_Write(PMCREG);     SPI_Write(0b11111000);  CS_1; // PMCREG - all ON
CS_0;  SPI_Write(RXCREG);     SPI_Write(0b10111001);  CS_1; // 134kHz, 97dBm, fast
CS_0;  SPI_Write(TXCREG);     SPI_Write(0b01000111);  CS_1; // 130 kHz, max power
CS_0;  SPI_Write(PMCREG);     SPI_Write(0b00111000);  CS_1; // Turn Transiver enabtid
CS_0;  SPI_Write(PMCREG);     SPI_Write(0b11011000);  CS_1; // Turn Receiver - On
CS_0;  SPI_Write(GENCREG);       SPI_Write(0b01111000);  CS_1;
CS_0;  SPI_Write(FIFORSTREG); SPI_Write(0b10000011);  CS_1; // Enable symshro FIFORSTREG

_delay_us(20); CS_0;  SPI_Write(0b00000000); SPI_Write(0b00000000);  CS_1; // Read STSREG

PORTD|=(1<<7); //FSEL_1
}

int main() {

DDRD=0xFF;
PORTD=0xFF;
DDRD&=~(1<<6); // SDO - input

init();

CS_0; SPI_Write(PMCREG); SPI_Write(0b01011001); CS_1;  // Типо на передачу
CS_0; SPI_Write(GENCREG); SPI_Write(0b11011001); CS_1;
CS_0; SPI_Write(PMCREG); SPI_Write(0b01111000); CS_1;

while(1) {

CS_0;
_delay_ms(40);

SPI_Write(TXBREG);

SPI_Write(0b01010101);

while(!(bit_is_set(PIND,6)));

SPI_Write(0b01010101);

while(!(bit_is_set(PIND,6)));

SPI_Write(0b01010101);

while(!(bit_is_set(PIND,6)));

CS_1;

_delay_ms(200);
}
}