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◆ ssd16xx_ram
SSD16xx RAM type for direct RAM access 
| Enumerator | 
|---|
| SSD16XX_RAM_BLACK  | The black RAM buffer. This is typically the buffer used to compose the contents that will be displayed after the next refresh.  
 | 
| SSD16XX_RAM_RED  |  | 
 
 
◆ ssd16xx_read_ram()
Read data directly from the display controller's internal RAM. 
- Parameters
 - 
  
    | dev | Pointer to device structure  | 
    | ram_type | Type of RAM to read from  | 
    | x | Coordinate relative to the upper left corner  | 
    | y | Coordinate relative to the upper left corner  | 
    | desc | Structure describing the buffer layout  | 
    | buf | Output buffer | 
  
   
- Return values
 - 
  
    | 0 | on success, negative errno on failure.  |