MinimOSD Kein Bild

void MAX7456Setup(void)
{
  uint8_t MAX7456_reset;
  uint8_t MAX_screen_rows;

 
  if(1) {    // PAL
    //ENABLE_display = 0x48;
    //ENABLE_display_vert = 0x4c;
    MAX7456_reset = 0x42;
    //DISABLE_display = 0x40;
    MAX_screen_size = 480;
    MAX_screen_rows = 16;
  }
  else {                                // NTSC
    //ENABLE_display = 0x08;
    //ENABLE_display_vert = 0x0c;
    MAX7456_reset = 0x02;
    //DISABLE_display = 0x00;
    MAX_screen_size = 390;
    MAX_screen_rows = 13;
  }

  pinMode(MAX7456RESET,OUTPUT);
  digitalWrite(MAX7456RESET,HIGH); //hard enable

  delay(250);

  pinMode(MAX7456SELECT,OUTPUT);
  digitalWrite(MAX7456SELECT,HIGH); //disable device

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

  // SPCR = 01010000
  //interrupt disabled,spi enabled,msb 1st,master,clk low when idle,
  //sample on leading edge of clk,system clock/4 rate (4 meg)

  SPCR = (1<<SPE)|(1<<MSTR);
  uint8_t spi_junk;
  spi_junk=SPSR;
  spi_junk=SPDR;
  delay(250);

  // force soft reset on Max7456
  digitalWrite(MAX7456SELECT,LOW);
  MAX7456_Send(VM0_reg, MAX7456_reset);
  digitalWrite(MAX7456SELECT,HIGH);
  delay(500);
  digitalWrite(MAX7456SELECT,LOW);

#ifdef FASTPIXEL 
  // force fast pixel timing
  MAX7456_Send(MAX7456ADD_OSDM, 0x00);
  // MAX7456_Send(MAX7456ADD_OSDM, 0xEC);
  // uint8_t srdata = spi_transfer(0xFF); //get data byte
  // srdata = srdata & 0xEF;
  // MAX7456_Send(0x6c, srdata);
  delay(500);
#endif

  // set all rows to same charactor white level, 120%
  uint8_t x;
  for(x = 0; x < MAX_screen_rows; x++) {
    MAX7456_Send(MAX7456ADD_RB0+x, WHITEBRIGHTNESS);
  }

  // make sure the Max7456 is enabled
  spi_transfer(VM0_reg);

  if (1){
    spi_transfer(OSD_ENABLE|VIDEO_MODE_PAL);
  }
  else{
    spi_transfer(OSD_ENABLE|VIDEO_MODE_NTSC);
  }
  digitalWrite(MAX7456SELECT,HIGH);
  delay(100);
# ifdef USE_VSYNC
  EIMSK |= (1 << INT0);  // enable interuppt
  EICRA |= (1 << ISC01); // interrupt at the falling edge
  sei();
#endif
}