emWin - SEGGER Microcontroller

Hardware configuration
This driver accesses the hardware using the indirect interface as described in the
chapter “Configuration” on page 1025. The following table lists the macros which
must be defined for hardware access:
Macro Description
LCD_READ_A0
Read a byte from LCD controller with A-line low. (Used only if working without
cache)
LCD_READ_A1
Read a byte from LCD controller with A-line high. (Used only if working without
cache)
LCD_WRITE_A0 Write a byte to LCD controller with A-line low.
LCD_WRITE_A1 Write a byte to LCD controller with A-line high.
LCD_WRITEM_A1 Write multiple bytes to LCD controller with A-line high.
Display orientation
The supported display controllers supports hardware mirroring of x/y axis. It is recommended
to use these functions instead of the display orientation macros of
emWin. If mirroring of the X axis is needed, the command 0xA1 (ADC select reverse)
should be used in the initialization macro. This causes the display controller to
reverse the assignment of column address to segment output. If the display size in X
is smaller than the number of segment outputs of the display controller, the macro
LCD_FIRSTSEG0 can be used to add an offset to the column address to make sure,
the right RAM address of the LCD controller is accessed.
If mirroring of the Y axis is needed the command 0xC8 (SHL select revers) should be
used in the initialization macro and the macro LCD_FIRSTCOM0 should be used to
define the offset needed to access the right RAM address of the display controller.
Additional configuration switches
The following table shows optional configuration switches available for this driver:
Macro Description
This macro can be used to define the first common address to be used in the data
LCD_FIRSTCOM0 RAM of the display controller. The value can be determined experimentally or
taken from the display documentation.
This macro can be used to define the first segment address to be used
LCD_FIRSTSEG0 in the data RAM of the display controller. The value can be determined
experimentally or taken from the display documentation.
UM03001 User & Reference Guide for emWin V5.18 © 1997 - 2012 SEGGER Microcontroller GmbH & Co. KG
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