158 lines
4.1 KiB
C
158 lines
4.1 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2003, 2004, 2005, 2008 Develer S.r.l. (http://www.develer.com/)
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* Copyright 2001 Bernie Innocenti <bernie@codewiz.org>
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*
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* -->
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*
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* \brief LCD low-level hardware macros
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*
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* \author Bernie Innocenti <bernie@codewiz.org>
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* \author Stefano Fedrigo <aleph@develer.com>
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*
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*/
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#ifndef HW_LCD_HD44_H
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#define HW_LCD_HD44_H
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#include "cfg/cfg_lcd_hd44.h" /* CONFIG_LCD_4BIT */
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#include <cpu/types.h>
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#include <cpu/irq.h>
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#warning TODO:This is an example implementation, you must implement it!
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/**
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* \name LCD I/O pins/ports
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* @{
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*/
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#define LCD_RS /* Implement me! */
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#define LCD_RW /* Implement me! */
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#define LCD_E /* Implement me! */
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#define LCD_DB0 /* Implement me! */
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#define LCD_DB1 /* Implement me! */
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#define LCD_DB2 /* Implement me! */
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#define LCD_DB3 /* Implement me! */
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#define LCD_DB4 /* Implement me! */
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#define LCD_DB5 /* Implement me! */
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#define LCD_DB6 /* Implement me! */
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#define LCD_DB7 /* Implement me! */
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/*@}*/
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/**
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* \name DB high nibble (DB[4-7])
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* @{
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*/
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#if CONFIG_LCD_4BIT
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#define LCD_MASK (LCD_DB7 | LCD_DB6 | LCD_DB5 | LCD_DB4)
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#define LCD_SHIFT 4
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#else
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#define LCD_MASK (uint8_t)0xff
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#define LCD_SHIFT 0
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#endif
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/*@}*/
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/**
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* \name LCD bus control macros
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* @{
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*/
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#define LCD_CLR_RS /* Implement me! */
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#define LCD_SET_RS /* Implement me! */
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#define LCD_CLR_RD /* Implement me! */
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#define LCD_SET_RD /* Implement me! */
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#define LCD_CLR_E /* Implement me! */
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#define LCD_SET_E /* Implement me! */
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/* Enter command mode */
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#define LCD_SET_COMMAND() /* Implement me! */
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/* Enter data mode */
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#define LCD_SET_DATA() /* Implement me! */
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#if CONFIG_LCD_4BIT
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#define LCD_WRITE_H(x) ((void)x)/* Implement me! */
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#define LCD_WRITE_L(x) ((void)x)/* Implement me! */
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#define LCD_READ_H ( 0 /* Implement me! */ )
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#define LCD_READ_L ( 0 /* Implement me! */ )
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#else
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#define LCD_WRITE(x) ((void)x)/* Implement me! */
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#define LCD_READ (0 /* Implement me! */ )
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#endif
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/*@}*/
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/** Set data bus direction to output (write to display) */
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#define LCD_DB_OUT /* Implement me! */
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/** Set data bus direction to input (read from display) */
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#define LCD_DB_IN /* Implement me! */
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/** Delay for write (Enable pulse width, 220ns) */
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#define LCD_DELAY_WRITE \
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do { \
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NOP; \
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NOP; \
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NOP; \
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NOP; \
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NOP; \
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} while (0)
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/** Delay for read (Data ouput delay time, 120ns) */
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#define LCD_DELAY_READ \
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do { \
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NOP; \
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NOP; \
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NOP; \
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NOP; \
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} while (0)
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INLINE void lcd_hd44_hw_bus_init(void)
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{
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cpu_flags_t flags;
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IRQ_SAVE_DISABLE(flags);
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/*
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* Here set bus pin!
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* to init a lcd device.
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*
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*/
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/*
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* Data bus is in output state most of the time:
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* LCD r/w functions assume it is left in output state
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*/
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LCD_DB_OUT;
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IRQ_RESTORE(flags);
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}
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#endif /* HW_LCD_HD44_H */
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