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/*! \file include/sys/lcd.h
\brief Internal Interface: LCD control and constants
\author Eddie C. Dost <ecd@skynet.be>
*/
/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License
* at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* The Original Code is legOS code, released October 17, 1999.
*
* The Initial Developer of the Original Code is Markus L. Noga.
* Portions created by Markus L. Noga are Copyright (C) 1999
* Markus L. Noga. All Rights Reserved.
*
* Contributor(s): Markus L. Noga <markus@noga.de>
*/
#ifndef __sys_lcd_h__
#define __sys_lcd_h__
#ifdef __cplusplus
extern "C" {
#endif
#include <config.h>
#include <rom/lcd.h>
///////////////////////////////////////////////////////////////////////
//
// Definitions
//
///////////////////////////////////////////////////////////////////////
// Offsets and size of the LCD shadow buffer used to speed up
// lcd_refresh()
//
#define LCD_SHORT_CMD 0
#define LCD_LONG_CMD 3
#define LCD_DATA_OFFSET 5
#define LCD_DATA_SIZE 9
// PCF8566 LCD driver commands
//
#define LCD_MODE_SET 0x40
#define LCD_ENABLE 0x08
#define LCD_DISABLE 0x00
// LCD i2c bus constants
//
#define LCD_DEV_ID 0x7c
#define I2C_WRITE 0
#define I2C_READ 1
#define SCL 5
#define SDA 6
///////////////////////////////////////////////////////////////////////
//
// Variables
//
///////////////////////////////////////////////////////////////////////
extern unsigned char display_memory[]; //!< LCD display data buffer
///////////////////////////////////////////////////////////////////////
//
// Functions
//
///////////////////////////////////////////////////////////////////////
//! initialize LCD driver
extern void lcd_init(void);
//! power on LCD display, also called from lcd_init()
extern void lcd_power_on(void);
//! power off LCD display
extern void lcd_power_off(void);
//! show LCD display contents to the world
/*! display updates are realized exclusively by calling this function.
*/
extern void lcd_refresh(void);
//! show LCD display contents to the world
/*! display updates are realized on a byte basis by calling this
function: the complete display will be updated after 9 calls.
*/
extern void lcd_refresh_next_byte(void)
#ifdef CONF_RCX_COMPILER
__attribute__ ((rcx_interrupt))
#endif
;
#ifdef __cplusplus
}
#endif
#endif // __sys_lcd_h__
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