Epson Research and Development

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Configuration

There are several issues to consider when configuring the display driver. The issues cover debugging support, register initialization values and memory allocation. Each of these issues is discussed in the following sections.

Compile Switches

There are several switches, specific to the S1D13705 display driver, which affect the display driver.

The switches are added or removed from the compile options in the file SOURCES.

WINCEVER

This option is automatically set to the numerical version of WinCE for version 2.12 or later. If the environment variable, _WINCEOSVER is not defined, then WINCEVER will default 2.11. The S1D display driver may test against this option to support different WinCE version-specific features.

EnablePreferVmem

This option enables the use of off-screen video memory. When this option is enabled, WinCE can optimize some BLT operations by using off-screen video memory to store images. You may need to disable this option for systems with limited off-screen memory.

EpsonMessages

This debugging option enables the display of EPSON-specific debug messages. These debug message are sent to the serial debugging port. This option should be disabled unless you are debugging the display driver, as they will significantly impact the performance of the display driver.

DEBUG_MONITOR

This option enables the use of the debug monitor. The debug monitor can be invoked when the display driver is first loaded and can be used to view registers, and perform a few debugging tasks. The debug monitor is still under development and is UNTESTED.

This option should remain disabled unless you are performing specific debugging tasks that require the debug monitor.

Windows® CE 3.x Display Drivers

S1D13705

Issue Date: 01/05/25

X27A-E-006-01

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Epson S1D13705 technical manual EnablePreferVmem