Internal definitions for PCD8544 displays. More...

Detailed Description

Internal definitions for PCD8544 displays.

Author: Hauke Petersen hauke.nosp@m..pet.nosp@m.ersen.nosp@m.@fu-.nosp@m.berli.nosp@m.n.de

#define	RESET_DELAY (5000) /* keep reset low for 5ms */
	Delay for resetting the device.

Communication modes: command or data
#define	MODE_CMD (0)
	we are sending a command

#define	MODE_DTA (1)
	we are sending some data

Maximum parameter values
#define	CONTRAST_MAX (127U)
	maximum possible contrast value

#define	TEMP_MAX (3U)
	maximum possible temp coefficient

#define	BIAS_MAX (7U)
	maximum possible bias value

Display commands
#define	CMD_DISABLE (0x24)
	set LCD into power down mode

#define	CMD_ENABLE_H (0x20)
	ON using horizontal addressing.

#define	CMD_ENABLE_V (0x22)
	ON using vertical addressing.

#define	CMD_EXTENDED (0x21)
	enter extended instruction set mode

#define	CMD_MODE_BLANK (0x08)
	display nothing

#define	CMD_MODE_NORMAL (0x0c)
	display memory content

#define	CMD_MODE_ALLON (0x09)
	display 'black' screen

#define	CMD_MODE_INVERSE (0x0d)
	display inverted memory content

#define	CMD_SET_Y (0x40)
	set 3-bit y address, OR with Y value

#define	CMD_SET_X (0x80)
	set 7-bit x address, OR with X value

#define	CMD_EXT_TEMP (0x04)
	select temperature coefficient

#define	CMD_EXT_BIAS (0x10)
	select BIAS value

#define	CMD_EXT_CONTRAST (0x80)
	set contrast, OR with [0 - 127]

Communication modes: command or data