emWin: LCD1611 driver

Supported hardware

Controllers

This driver has been tested with the following LCD controllers

Epson S1D15E05, Epson S1D15719
UltraChip UC1611

Bits per pixel

Supported color depth is 2bpp (UC1610, S1D15E05, S1D15719) and 4bpp (UC1611).

Interfaces

8-bit parallel (simple bus), serial (SPI4) and I2C bus interfaces are supported.

Display data RAM organization

The picture above shows the relation between the display memory and the SEG and COM lines of the LCD.

Additional RAM requirements of the driver

This LCD driver can be used with or without a display data cache. The data cache containins a complete copy of the contents of the LCD data RAM. If a cache is not used, there are no additional RAM requirements. It is highly recommended to use this driver with a data cache for faster LCD-access. It would slow down the performance of the driver if not using a data cache very much. The amount of memory used by the cache may be calculated as follows:
Size of RAM (in bytes) = (LCD_YSIZE + 1) / 2 * LCD_XSIZE

Additional driver functions

None.

Hardware configuration

This driver accesses the hardware with a simple bus interface as described in Chapter 25: "Low-Level Configuration". The following table lists the macros which must be defined for hardware access:

Macro	Explanation
LCD_INIT_CONTROLLER	Initialization sequence for the LCD controller.
LCD_READ_A0	Read a byte from LCD controller with A-line low.
LCD_READ_A1	Read a byte from LCD controller with A-line high.
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

The following table shows optional configuration switches available for this driver:

Macro	Explanation
LCD_CACHE	LCD_CACHE When set to 0, no display data cache is used, which slows down the speed of the driver. Default is 1 (cache activated).

Special requirements

None.