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Здравствуйте уважаемые жители и гости форума. Прошу помощи - разобратья в коде.

Я собираю связку Ардуино и OSD меню генератор MAX7456.

Вот код рабочий:

#define VSYNC 2 // INT0
#define DATAOUT 11//MOSI
#define DATAIN  12//MISO
#define SPICLOCK  13//sck
#define MAX7456SELECT 10//ss


#define DMM_reg   0x04
#define DMAH_reg  0x05
#define DMAL_reg  0x06
#define DMDI_reg  0x07
#define VM0_reg   0x00
#define VM1_reg   0x01

#define VIDEO_BUFFER_DISABLE 0x01
#define MAX7456_RESET 0x02
#define VERTICAL_SYNC_NEXT_VSYNC 0x04
#define OSD_ENABLE 0x08
#define SYNC_MODE_AUTO 0x00
#define SYNC_MODE_INTERNAL 0x30
#define SYNC_MODE_EXTERNAL 0x20
#define VIDEO_MODE_PAL 0x40
#define VIDEO_MODE_NTSC 0x00

#define BLINK_DUTY_CYCLE_50_50 0x00
#define BLINK_DUTY_CYCLE_33_66 0x01
#define BLINK_DUTY_CYCLE_25_75 0x02
#define BLINK_DUTY_CYCLE_75_25 0x03

#define BLINK_TIME_0 0x00
#define BLINK_TIME_1 0x04
#define BLINK_TIME_2 0x08
#define BLINK_TIME_3 0x0C

#define BACKGROUND_BRIGHTNESS_0 0x00
#define BACKGROUND_BRIGHTNESS_7 0x10
#define BACKGROUND_BRIGHTNESS_14 0x20
#define BACKGROUND_BRIGHTNESS_21 0x30
#define BACKGROUND_BRIGHTNESS_28 0x40
#define BACKGROUND_BRIGHTNESS_35 0x50
#define BACKGROUND_BRIGHTNESS_42 0x60
#define BACKGROUND_BRIGHTNESS_49 0x70

#define BACKGROUND_MODE_GRAY 0x40

#define CLEAR_display 0x04
#define CLEAR_display_vert 0x06
#define END_string 0xff
#define ENABLE_display 0x08
#define ENABLE_display_vert 0x0c
#define MAX7456_reset 0x02
#define DISABLE_display 0x00


#define WHITE_level_80 0x03
#define WHITE_level_90 0x02
#define WHITE_level_100 0x01
#define WHITE_level_120 0x00

#define MAX_screen_size 390
#define MAX_screen_rows 16

 byte spi_junk, eeprom_junk;
 int x;
//////////////////////////////////////////////////////////////
void setup()
{
  Serial.begin(115200);
  Serial.flush();

  pinMode(MAX7456SELECT,OUTPUT);
  digitalWrite(MAX7456SELECT,HIGH); 

  pinMode(DATAOUT, OUTPUT);
  pinMode(DATAIN, INPUT);
  pinMode(SPICLOCK,OUTPUT);
  pinMode(VSYNC, INPUT);

  SPCR = (1<<SPE)|(1<<MSTR);
  spi_junk=SPSR;
  spi_junk=SPDR;
  delay(250);

  digitalWrite(MAX7456SELECT,LOW);
  spi_transfer(VM0_reg);
  spi_transfer(MAX7456_reset);
  digitalWrite(MAX7456SELECT,HIGH);
  delay(500);

  digitalWrite(MAX7456SELECT,LOW);
  for (x = 0; x < MAX_screen_rows; x++)
  {
    spi_transfer(x + 0x10);
    spi_transfer(WHITE_level_90);
  }

  spi_transfer(VM0_reg);
    spi_transfer(VERTICAL_SYNC_NEXT_VSYNC|OSD_ENABLE|VIDEO_MODE_PAL);

  spi_transfer(VM1_reg);
  spi_transfer(BLINK_TIME_3);

  digitalWrite(MAX7456SELECT,HIGH);
  delay(100);
}
 /////////////////////////////////////////////////////////////
void loop()
{
  OSD_write_to_screen("http://compcar.ru", 2, 1, 0,1);
  OSD_write_to_screen("http://compcar.ru", 2, 2, 0,0);
  OSD_write_to_screen("Привет!!!", 11, 6, 1,1); 
  OSD_write_to_screen("ПРИВЕТ!!!", 11, 7, 1,0);
  OSD_write_to_screen("http://compcar.ru", 13, 13, 0,1);
  OSD_write_to_screen("http://compcar.ru", 13, 14, 0,0);

  delay(5000);
}
//////////////////////////////////////////////////////////////
byte spi_transfer(volatile byte data)
{
  SPDR = data;            
  while (!(SPSR & (1<<SPIF)))  
  {
  };
  return SPDR;        
}
// ============================================================   
void OSD_write_to_screen(const char s[], byte x, byte y, byte blink, byte invert){
  unsigned int linepos;
  byte local_count;
  byte settings, char_address_hi, char_address_lo;
  byte screen_char;

  local_count = 0;

  char_address_hi = 0;
  char_address_lo = 0;

  linepos = y*30+x;

  char_address_hi = linepos >> 8;
  char_address_lo = linepos;

  settings = B00000001;

  if (blink) {
    settings |= (1 << 4);    
  }

  if (invert){
    settings |= (1 << 3);    
  }


  digitalWrite(MAX7456SELECT,LOW);

  spi_transfer(DMM_reg); 
  spi_transfer(settings);

  spi_transfer(DMAH_reg); 
  spi_transfer(char_address_hi);

  spi_transfer(DMAL_reg); 
  spi_transfer(char_address_lo);

  while(s[local_count]!='\0') 
  {
    screen_char = s[local_count];
      if(screen_char != 208 && screen_char != 209)
      {
        spi_transfer(DMDI_reg);
        spi_transfer(screen_char);
      }
    local_count++;
  }

  spi_transfer(DMDI_reg);
  spi_transfer(END_string);

  spi_transfer(DMM_reg); 
  spi_transfer(B00000000);

  digitalWrite(MAX7456SELECT,HIGH);
}  

Я, попробовал скопировать шапку:

#define DATAOUT 11//MOSI 
#define DATAIN  12//MISO 
#define SPICLOCK  13//sck 
#define MAX7456SELECT 10//ss
#define VSYNC 0x02// INT0 

#define DMM_reg   0x04 
#define DMAH_reg  0x05 
#define DMAL_reg  0x06 
#define DMDI_reg  0x07 
#define VM0_reg   0x00 
#define VM1_reg   0x01 

#define VIDEO_BUFFER_DISABLE 0x01 
#define MAX7456_RESET 0x02 
#define VERTICAL_SYNC_NEXT_VSYNC 0x04 
#define OSD_ENABLE 0x08 
#define SYNC_MODE_AUTO 0x00 
#define SYNC_MODE_INTERNAL 0x30 
#define SYNC_MODE_EXTERNAL 0x20 
#define VIDEO_MODE_PAL 0x40 
#define VIDEO_MODE_NTSC 0x00 

#define BLINK_DUTY_CYCLE_50_50 0x00 
#define BLINK_DUTY_CYCLE_33_66 0x01 
#define BLINK_DUTY_CYCLE_25_75 0x02 
#define BLINK_DUTY_CYCLE_75_25 0x03 

#define BLINK_TIME_0 0x00 
#define BLINK_TIME_1 0x04 
#define BLINK_TIME_2 0x08 
#define BLINK_TIME_3 0x0C 

#define BACKGROUND_BRIGHTNESS_0 0x00 
#define BACKGROUND_BRIGHTNESS_7 0x10 
#define BACKGROUND_BRIGHTNESS_14 0x20 
#define BACKGROUND_BRIGHTNESS_21 0x30 
#define BACKGROUND_BRIGHTNESS_28 0x40 
#define BACKGROUND_BRIGHTNESS_35 0x50 
#define BACKGROUND_BRIGHTNESS_42 0x60 
#define BACKGROUND_BRIGHTNESS_49 0x70 

#define BACKGROUND_MODE_GRAY 0x40 

#define CLEAR_display 0x04 
#define CLEAR_display_vert 0x06 
#define END_string 0xff 
#define ENABLE_display 0x08 
#define ENABLE_display_vert 0x0c 
#define MAX7456_reset 0x02 
#define DISABLE_display 0x00 


#define WHITE_level_80 0x03 
#define WHITE_level_90 0x02 
#define WHITE_level_100 0x01 
#define WHITE_level_120 0x00 

#define MAX_screen_size 390 
#define MAX_screen_rows 16

 byte spi_junk, eeprom_junk; 
 int x;

void setup() 
{
  Serial.begin(115200); 
  Serial.flush(); 

  pinMode(MAX7456SELECT,OUTPUT); 
  digitalWrite(MAX7456SELECT,HIGH);  

  pinMode(DATAOUT, OUTPUT); 
  pinMode(DATAIN, INPUT); 
  pinMode(SPICLOCK,OUTPUT); 
  pinMode(VSYNC, INPUT); 

  SPCR = (1<<SPE)|(1<<MSTR); 
  spi_junk=SPSR; 
  spi_junk=SPDR; 
  delay(250); 

  digitalWrite(MAX7456SELECT,LOW); 
  spi_transfer(VM0_reg); 
  spi_transfer(MAX7456_reset); 
  digitalWrite(MAX7456SELECT,HIGH); 
  delay(500); 

  digitalWrite(MAX7456SELECT,LOW); 
  for (x = 0; x < MAX_screen_rows; x++) 
  { 
    spi_transfer(x + 0x10); 
    spi_transfer(WHITE_level_90); 
  } 

  spi_transfer(VM0_reg); 
    spi_transfer(VERTICAL_SYNC_NEXT_VSYNC|OSD_ENABLE|VIDEO_MODE_PAL); 

  spi_transfer(VM1_reg); 
  spi_transfer(BLINK_TIME_3); 

  digitalWrite(MAX7456SELECT,HIGH); 
  delay(100); 

}

void loop() {
 

}

При проверке этой шапки выдает ошибку компилятор: spi_transfer() - не объявлена.

В первом коде - оригинальном, такой ошибки нет. Открываю все в одном и том же компиляторе, библиотек нет подключенных ни в первом ни во втором варианте. Почему так ведет себя компилятор?