28 #ifndef _SSD1331_COMMANDS_H_    29 #define _SSD1331_COMMANDS_H_    39     SSD1331_COLUMNADDR       = 0x15,
    40     SSD1331_DRAWLINE         = 0x21,
    41     SSD1331_ROWADDR          = 0x75,
    42     SSD1331_CONTRASTA        = 0x81,
    43     SSD1331_CONTRASTB        = 0x82,
    44     SSD1331_CONTRASTC        = 0x83,
    45     SSD1331_MASTERCURRENT    = 0x87,
    46     SSD1331_PRECHARGEA       = 0x8A,
    47     SSD1331_PRECHARGEB       = 0x8B,
    48     SSD1331_SEGREMAP         = 0xA0,
    49     SSD1331_SETSTARTLINE     = 0xA1,
    50     SSD1331_SETDISPLAYOFFSET = 0xA2,
    51     SSD1331_NORMALDISPLAY    = 0xA4,
    52     SSD1331_SETMULTIPLEX     = 0xA8,
    53     SSD1331_SETMASTER        = 0xAD,
    54     SSD1331_DISPLAYOFF       = 0xAE,
    55     SSD1331_DISPLAYON        = 0xAF,
    56     SSD1331_POWERMODE        = 0xB0,
    57     SSD1331_SETPRECHARGE     = 0xB1,
    58     SSD1331_CLOCKDIV         = 0xB3,
    59     SSD1331_PRECHARGELEVEL   = 0xBB,
    69 #endif // _SSD1331_COMMANDS_H_