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77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* Copyright (C) 2015 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup drivers_pcd8544
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*
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* @{
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*
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* @file
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* @brief Internal definitions for PCD8544 displays
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*/
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#ifndef PCD8544_INTERNAL_H
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#define PCD8544_INTERNAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Delay for resetting the device
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*/
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#define RESET_DELAY (5000) /* keep reset low for 5ms */
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/**
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* @name Communication modes: command or data
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* @{
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*/
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#define MODE_CMD (0) /**< we are sending a command */
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#define MODE_DTA (1) /**< we are sending some data */
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/** @} */
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/**
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* @name Maximum parameter values
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* @{
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*/
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#define CONTRAST_MAX (127U) /**< maximum possible contrast value */
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#define TEMP_MAX (3U) /**< maximum possible temp coefficient */
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#define BIAS_MAX (7U) /**< maximum possible bias value */
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/** @} */
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/**
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* @name Display commands
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* @{
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*/
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#define CMD_DISABLE (0x24) /**< set LCD into power down mode */
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#define CMD_ENABLE_H (0x20) /**< ON using horizontal addressing */
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#define CMD_ENABLE_V (0x22) /**< ON using vertical addressing */
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#define CMD_EXTENDED (0x21) /**< enter extended instruction set mode */
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#define CMD_MODE_BLANK (0x08) /**< display nothing */
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#define CMD_MODE_NORMAL (0x0c) /**< display memory content */
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#define CMD_MODE_ALLON (0x09) /**< display 'black' screen */
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#define CMD_MODE_INVERSE (0x0d) /**< display inverted memory content */
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#define CMD_SET_Y (0x40) /**< set 3-bit y address, OR with Y value */
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#define CMD_SET_X (0x80) /**< set 7-bit x address, OR with X value */
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#define CMD_EXT_TEMP (0x04) /**< select temperature coefficient */
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#define CMD_EXT_BIAS (0x10) /**< select BIAS value */
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#define CMD_EXT_CONTRAST (0x80) /**< set contrast, OR with [0 - 127] */
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/** @} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* PCD8544_INTERNAL_H */
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/** @} */
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