+++ /dev/null
-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction. Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License. This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
- * Copyright 2001 Bernardo Innocenti <bernie@codewiz.org>
- *
- * -->
- *
- * \version $Id$
- *
- * \author Bernardo Innocenti <bernie@develer.com>
- * \author Stefano Fedrigo <aleph@develer.com>
- *
- * \brief LCD low-level hardware macros
- */
-
-#ifndef HW_LCD_H
-#define HW_LCD_H
-
-#include <appconfig.h>
-//#include <hw.h>
-
-#include <cpu/attr.h>
-#include <cpu/irq.h>
-#include <cpu/types.h>
-
-#include <cfg/macros.h> /* BV() */
-#include <cfg/debug.h>
-
-#include <avr/io.h>
-#include <stdbool.h>
-#include <inttypes.h>
-
-/**
- * \name LCD I/O pins/ports
- * @{
- */
-#define LCD_RS BV(PG3)
-#define LCD_RW BV(PG0)
-#define LCD_E BV(PG2)
-#define LCD_DB0 BV(PA0)
-#define LCD_DB1 BV(PA1)
-#define LCD_DB2 BV(PA2)
-#define LCD_DB3 BV(PA3)
-#define LCD_DB4 BV(PA4)
-#define LCD_DB5 BV(PA5)
-#define LCD_DB6 BV(PA6)
-#define LCD_DB7 BV(PA7)
-/*@}*/
-
-/**
- * \name DB high nibble (DB[4-7])
- * @{
- */
-#define LCD_PORT PORTG
-#define LCD_DB_PORT PORTA
-#define LCD_PIN PING
-#define LCD_DB_PIN PINA
-#define LCD_DDR DDRG
-#define LCD_DB_DDR DDRA
-
-#if CONFIG_LCD_4BIT
- #define LCD_MASK (LCD_DB7 | LCD_DB6 | LCD_DB5 | LCD_DB4)
- #define LCD_SHIFT 4
-#else
- #define LCD_MASK (uint8_t)0xff
- #define LCD_SHIFT 0
-#endif
-/*@}*/
-
-/**
- * \name LCD bus control macros
- * @{
- */
-#define LCD_CLR_RS (LCD_PORT &= ~LCD_RS)
-#define LCD_SET_RS (LCD_PORT |= LCD_RS)
-#define LCD_CLR_RD (LCD_PORT &= ~LCD_RW)
-#define LCD_SET_RD (LCD_PORT |= LCD_RW)
-#define LCD_CLR_E (LCD_PORT &= ~LCD_E)
-#define LCD_SET_E (LCD_PORT |= LCD_E)
-
-#if CONFIG_LCD_4BIT
- #define LCD_WRITE_H(x) (LCD_DB_PORT = (LCD_DB_PORT & ~LCD_MASK) | (((x) >> (4 - LCD_SHIFT)) & LCD_MASK))
- #define LCD_WRITE_L(x) (LCD_DB_PORT = (LCD_DB_PORT & ~LCD_MASK) | (((x) << LCD_SHIFT) & LCD_MASK))
- #define LCD_READ_H ((LCD_DB_PIN & LCD_MASK) >> (4 - LCD_SHIFT))
- #define LCD_READ_L ((LCD_DB_PIN & LCD_MASK) >> LCD_SHIFT)
-#else
- #define LCD_WRITE(x) (LCD_DB_PORT = (x))
- #define LCD_READ (LCD_DB_PIN)
-#endif
-/*@}*/
-
-/** Set data bus direction to output (write to display) */
-#define LCD_DB_OUT (LCD_DB_DDR |= LCD_MASK)
-
-/** Set data bus direction to input (read from display) */
-#define LCD_DB_IN (LCD_DB_DDR &= ~LCD_MASK)
-
-/** Delay for write (Enable pulse width, 220ns) */
-#define LCD_DELAY_WRITE \
- do { \
- NOP; \
- NOP; \
- NOP; \
- NOP; \
- NOP; \
- } while (0)
-
-/** Delay for read (Data ouput delay time, 120ns) */
-#define LCD_DELAY_READ \
- do { \
- NOP; \
- NOP; \
- NOP; \
- NOP; \
- } while (0)
-
-
-INLINE void lcd_bus_init(void)
-{
- cpuflags_t flags;
- IRQ_SAVE_DISABLE(flags);
-
- LCD_PORT = (LCD_PORT & ~(LCD_E | LCD_RW)) | LCD_RS;
- LCD_DDR |= LCD_RS | LCD_RW | LCD_E;
-
- /*
- * Data bus is in output state most of the time:
- * LCD r/w functions assume it is left in output state
- */
- LCD_DB_OUT;
-
-
- IRQ_RESTORE(flags);
-}
-
-#endif /* HW_LCD_H */
projects / bertos.git / blobdiff