µC/GUI LCD07X1 Driver
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LCD07X1 Driver
Supported controllers
This driver has been tested with the following LCD controllers:
- Samsung KSO711
- Samsung KSO741
- Solomon SSD1854
It should be assumed that it will also work with any controller
of similar organization.
Bits per pixel
The supported color depth is 2 bpp.
Interfaces
The chip supports three types of interfaces:
- 8-bit parallel (simple bus) interface
- 4-pin SPI
- 3-pin SPI
The current version of the driver supports the 8-bit parallel (simple bus) or 4-pin
SPI modes.
Display data RAM organization
The picture above shows the relation between the display memory
and the SEG and COM lines of the LCD. The display memory is divided
into two panes for each pixel. The lower bit of one pixel is stored
in pane 0 and the higher bit is stored in pane 1.
Additional RAM requirements of the driver
This LCD driver may be used with or without a display data cache,
containing a com- plete copy of the contents of the LCD data RAM.
If a cache is not used, there are no additional RAM requirements.
It is recommended to use this driver with a data cache for faster
LCD-access. The amount of memory used by the cache may be calculated
as follows:
Size of RAM (in bytes) = (LCD_YSIZE + 7) / 8 * LCD_XSIZE * 2
Additional driver functions
LCD_L0_ControlCache
Hardware configuration
This driver accesses the hardware with a simple bus interface as
described in the "Low-Level Configuration" chapter of the user manual. The following
table lists the macros which must be defined for hardware access:
Parallel mode
| Macro |
Description |
| LCD_INIT_CONTROLLER |
Initialization sequence for the LCD controller. |
| 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. |
Additional configuration switches
None.
Special requirements for certain LCD controllers
None.
|
