S1D13705 Epson Electronics America, Inc., S1D13705 Datasheet - Page 148

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

Page 56
S1D13705
X27A-G-002-02
Note
Note
int seSplitInit(WORD Scrn1Addr, WORD Scrn2Addr)
Description:
Parameters:
Return Value: ERR_OK - operation completed with no problems
int seSplitScreen(int Screen, int VisibleScanlines)
Description:
Parameters:
Return Value: ERR_OK
It is assumed that the system has been initialized prior to calling seSplitInit().
Changing the number of lines for one screen will also change the number of lines for the
other screen.
seSplitInit() must be called before calling seSplitScreen().
This function prepares the system for split screen operation. In order for split screen
to function the starting address in the display buffer for the upper portion(screen 1)
and the lower portion (screen 2) must be specified. Screen 1 is always displayed
above screen 2 on the display regardless of the location of their start addresses.
Scrn1Addr - offset, in bytes, to the start of screen 1
Scrn2Addr - offset, in bytes, to the start of screen 2
Changes the relevant registers to adjust the split screen according to the number of
visible lines requested. 'WhichScreen' determines which screen, 1 or 2, to base the
changes on.
The smallest surface screen 1 can display is one line. This is due to the way the
S1D13705 operates. Setting Screen 1 Vertical Size to zero results in one line of
screen 1 being displayed. The remainder of the display will be screen 2 image.
Screen
VisibleScanlines- number of lines to display for the selected screen
ERR_HAL_BAD_ARG- argument VisibleScanlines is negative or is greater than
vertical panel size or WhichScreen is not SCREEN1 or SCREEN 2.
- must be set to 1 or 2 (or use the constants SCREEN1 or SCREEN2)
- operation completed with no problems
Epson Research and Development
Programming Notes and Examples
Vancouver Design Center
Issue Date: 01/02/13