Problem SPI bei PIC

#include <18f2480.h>

#device *=16

#device ADC=10

#use delay(clock=8000000)

#fuses NOWDT,HS,NOPUT,NOPROTECT,NOBROWNOUT,NOLVP

#define SPI_MODE_0_0 (SPI_L_TO_H | SPI_XMIT_L_TO_H)

#define SPI_MODE_0_1 (SPI_L_TO_H)

#define SPI_MODE_1_0 (SPI_H_TO_L)

#define SPI_MODE_1_1 (SPI_H_TO_L | SPI_XMIT_L_TO_H) 

#use rs232(baud=9600,xmit=PIN_C6,rcv=PIN_C7,BRGH1OK,stream=debug)

#define SPANNUNG_REF 4

#define KOMPERATOR_REF  0

#define LUFTBLASENSENSOR 1

#define CS PIN_C2

#define CREAD 0b00111100    // continous read

void main()

{

  int8 ad_in1;

  int8 ad_in2;

  int8 ad_in3;

  setup_spi(SPI_MASTER | SPI_MODE_1_1 | SPI_CLK_DIV_16);

  setup_adc(adc_off);

  SET_TRIS_C( 0b00001000 );  

  output_high(CS);

  delay_ms(100);

  puts("\nLuftblase;Referenzspannung;Komparator_Ref;Luftblasensensor\n");

  while (TRUE)    

  {

    delay_ms(20);

    output_low(CS);  

    if (input(PIN_B0))

      {

      printf("Ja;");

      }

    else

      {

      printf("Nein;");

      }

    spi_write(CREAD);

    ad_in1 = spi_read(0);

    ad_in2 = spi_read(0);

    ad_in3 = spi_read(0);

    output_high(CS);

    fprintf(debug,"%u %u %u;\n", ad_in1, ad_in2, ad_in3);

  }

}