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]

Macro Definition Documentation

◆ BIAS_MAX

#define BIAS_MAX (7U)

maximum possible bias value

Definition at line 46 of file pcd8544_internal.h.

◆ CMD_DISABLE

#define CMD_DISABLE (0x24)

set LCD into power down mode

Definition at line 53 of file pcd8544_internal.h.

◆ CMD_ENABLE_H

#define CMD_ENABLE_H (0x20)

ON using horizontal addressing.

Definition at line 54 of file pcd8544_internal.h.

◆ CMD_ENABLE_V

#define CMD_ENABLE_V (0x22)

ON using vertical addressing.

Definition at line 55 of file pcd8544_internal.h.

◆ CMD_EXT_BIAS

#define CMD_EXT_BIAS (0x10)

select BIAS value

Definition at line 67 of file pcd8544_internal.h.

◆ CMD_EXT_CONTRAST

#define CMD_EXT_CONTRAST (0x80)

set contrast, OR with [0 - 127]

Definition at line 68 of file pcd8544_internal.h.

◆ CMD_EXT_TEMP

#define CMD_EXT_TEMP (0x04)

select temperature coefficient

Definition at line 66 of file pcd8544_internal.h.

◆ CMD_EXTENDED

#define CMD_EXTENDED (0x21)

enter extended instruction set mode

Definition at line 56 of file pcd8544_internal.h.

◆ CMD_MODE_ALLON

#define CMD_MODE_ALLON (0x09)

display 'black' screen

Definition at line 60 of file pcd8544_internal.h.

◆ CMD_MODE_BLANK

#define CMD_MODE_BLANK (0x08)

display nothing

Definition at line 58 of file pcd8544_internal.h.

◆ CMD_MODE_INVERSE

#define CMD_MODE_INVERSE (0x0d)

display inverted memory content

Definition at line 61 of file pcd8544_internal.h.

◆ CMD_MODE_NORMAL

#define CMD_MODE_NORMAL (0x0c)

display memory content

Definition at line 59 of file pcd8544_internal.h.

◆ CMD_SET_X

#define CMD_SET_X (0x80)

set 7-bit x address, OR with X value

Definition at line 64 of file pcd8544_internal.h.

◆ CMD_SET_Y

#define CMD_SET_Y (0x40)

set 3-bit y address, OR with Y value

Definition at line 63 of file pcd8544_internal.h.

◆ CONTRAST_MAX

#define CONTRAST_MAX (127U)

maximum possible contrast value

Definition at line 44 of file pcd8544_internal.h.

◆ MODE_CMD

#define MODE_CMD (0)

we are sending a command

Definition at line 36 of file pcd8544_internal.h.

◆ MODE_DTA

#define MODE_DTA (1)

we are sending some data

Definition at line 37 of file pcd8544_internal.h.

◆ RESET_DELAY

#define RESET_DELAY (5000) /* keep reset low for 5ms */

Delay for resetting the device.

Definition at line 30 of file pcd8544_internal.h.

◆ TEMP_MAX

#define TEMP_MAX (3U)

maximum possible temp coefficient

Definition at line 45 of file pcd8544_internal.h.