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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. |