S1D13705 Epson Electronics America, Inc., S1D13705 Datasheet - Page 147

• Manufacturer Part Number: S1D13705
• Description: S1d13705 Embedded Memory Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
9.4.3 Advanced HAL Functions
Programming Notes and Examples
Issue Date: 01/02/13
Description:
Parameters:
Return Value: ERR_OK
Advanced HAL functions include the functions to support split, virtual and rotated
displays. While the concept for using these features is advanced the HAL makes actually
using them easy.
Description:
Parameters:
Return Value: ERR_OK - operation completed with no problems
Description:
Parameters:
Return Value: ERR_OK - operation completed with no problems
int seSetHighPerformance(BOOL OnOff)
int seSetPortraitMethod( int Style )
int seSetHWRotate(int Rotate)
This function call enables or disable the high performance bit of the S1D13705.
When high performance is enabled then MClk equals PClk for all video display
resolutions. In the high performance state CPU to video memory performance is
improved at the cost of higher power consumption.
When high performance is disabled then MClk ranges from PClk/1 at 8 bit-per-pixel
to PClk/8 at 1 bit-per-pixel. Without high performance CPU to video memory
speeds are slower and the S1D13705 uses less power.
OnOff
This selects the portrait mode method to be used when seSetHWRotate() is called to
put the S1D13705 into portrait mode.
Style
ERR_FAILED - the operation failed.
This function sets the rotation scheme according to the value of 'Rotate'. When
portrait mode is selected as the display rotation the scheme selected is the 'non-X2'
scheme.
Rotate
ERR_FAILED - the operation failed to complete.
The most likely reason for failing to set a rotate mode is an inability to set the desired
frame rate when setting portrait mode. Other factors which can cause a failure
include having a 0 Hz frame rate or specifying a value other than LANDSCAPE or
PORTRAIT for the rotation scheme.
- a boolean value (defined in HAL.H) to indicate whether to
- operation completed with no problems
- call with style set to DEFAULT (-1) to select Default Portrait Mode
- call with style set to any other value to select Alternate Portrait Mode.
- the direction to rotate the display
- Valid arguments for Rotate are: LANDSCAPE and PORTRAIT.
enable of disable high performance.
X27A-G-002-02
S1D13705
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