Fehler in For-Schleife mit I2C Kommunikation

[uffi]

Der fehlerbehaftete Code entspricht noch dem aus dem Anhang "Problem.zip", außer dass buffer[4] statt buffer[3] deklariert wurde.

Der fehlerfreie Code sieht so aus (FOR-Schleife aufgelöst):

  // select display
  lcd_select(0);     
 
  // check if ultrasonic sensor is busy
   busy_US[0] = i2c_start(US_left + I2C_READ);
 
   // address I2C device ultrasonic sensor with read access
   if (busy_US[0] == 0)
   {
    distance[0] = i2c_readNak(); // read one byte
    i2c_stop(); // release I2C bus
 
    utoa(distance[0], buffer, 10);
 
    // move cursor to position on line 0
    lcd_gotoxy(10,0);  
    // put string to display (line 0)
    lcd_puts(buffer);
    lcd_puts("  ");
   }
   else
   {
    i2c_stop(); // release I2C bus
   }
 
   busy_US[1] = i2c_start(US_front + I2C_READ);
 
   // address I2C device ultrasonic sensor with read access
   if (busy_US[1] == 0)
   {
    distance[1] = i2c_readNak(); // read one byte
    i2c_stop(); // release I2C bus
 
    utoa(distance[1], buffer, 10);
 
    // move cursor to position on line 0
    lcd_gotoxy(14,0);  
    // put string to display (line 0)
    lcd_puts(buffer);
    lcd_puts("  ");
   }
   else
   {
    i2c_stop(); // release I2C bus
   }
 
   busy_US[2] = i2c_start(US_right + I2C_READ);
 
   // address I2C device ultrasonic sensor with read access
   if (busy_US[2] == 0)
   {
    distance[2] = i2c_readNak(); // read one byte
    i2c_stop(); // release I2C bus
 
    utoa(distance[2], buffer, 10);
 
    // move cursor to position on line 0
    lcd_gotoxy(18,0);  
    // put string to display (line 0)
    lcd_puts(buffer);
    lcd_puts("  ");
   }
   else
   {
    i2c_stop(); // release I2C bus
   }
 
     i2c_start(US_general + I2C_WRITE);
     // address I2C device ultrasonic sensor with write access
     i2c_write(Start_US); //start new ultrasonic measurement
     i2c_stop(); // release I2C bus