Move avr drivers.

[bertos.git] / drv / lcd_hd44.c

diff --git a/drv/lcd_hd44.c b/drv/lcd_hd44.c
old mode 100755 (executable)
new mode 100644 (file)
index ecfea36..9c5c477
--- a/drv/lcd_hd44.c
+++ b/drv/lcd_hd44.c
@@ -1,8 +1,33 @@
-/*!
+/**
  * \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 2005 Develer S.r.l. (http://www.develer.com/)
- * This file is part of DevLib - See README.devlib for information.
+ *
  * -->
  *
  * \brief LM044L type LCD hardware module (impl.)
@@ -14,6 +39,18 @@
 
 /*#*
  *#* $Log$
+ *#* Revision 1.5  2007/10/01 18:59:27  batt
+ *#* Set to const col_address; add static assert check on array dimension.
+ *#*
+ *#* Revision 1.4  2007/10/01 10:46:09  batt
+ *#* Add light LCD position computation.
+ *#*
+ *#* Revision 1.3  2006/09/20 19:55:01  marco
+ *#* Added CONFIG_LCD_4BIT.
+ *#*
+ *#* Revision 1.2  2006/07/19 12:56:25  bernie
+ *#* Convert to new Doxygen style.
+ *#*
  *#* Revision 1.1  2005/11/04 18:00:42  bernie
  *#* Import into DevLib.
  *#*
@@ -34,8 +71,8 @@
  *#*/
 
 #include "lcd_hd44.h"
-#include "lcd_bus_pz.h"
-#include <arch_config.h>
+#include "hw_lcd.h"
+#include <cfg/arch_config.h>
 #include <drv/timer.h>
 
 #if defined(LCD_READ_H) && defined(LCD_READ_L) && defined(LCD_WRITE_H) && defined(LCD_WRITE_L)
@@ -46,10 +83,12 @@
        #error Incomplete or missing LCD_READ/LCD_WRITE macros
 #endif
 
-/*! Flag di stato del display */
+/** Flag di stato del display */
 #define LCDF_BUSY  BV(7)
 
-/*!
+#if CONFIG_LCD_ADDRESS_FAST == 1
+#define lcd_address(x) lcd_address[x]
+/**
  * Addresses of LCD display character positions, expanded
  * for faster access (DB7 = 1).
  */
@@ -96,8 +135,28 @@ static const uint8_t lcd_address[] =
 };
 
 STATIC_ASSERT(countof(lcd_address) == LCD_ROWS * LCD_COLS);
+#else  /* CONFIG_LCD_ADDRESS_FAST == 0 */
 
-/*!
+static const uint8_t col_address[] =
+{
+       0x80,
+       0xC0,
+#if LCD_ROWS > 2
+       0x94,
+       0xD4
+#endif
+};
+STATIC_ASSERT(countof(col_address) == LCD_ROWS);
+/**
+ * Addresses of LCD display character positions, calculated runtime to save RAM
+ */
+static uint8_t lcd_address(uint8_t addr)
+{
+       return col_address[addr / LCD_COLS] + addr % LCD_COLS;
+}
+#endif /* CONFIG_LCD_ADDRESS_FAST */
+
+/**
  * Current display position. We remember this to optimize
  * LCD output by avoiding to set the address every time.
  */
@@ -181,7 +240,7 @@ INLINE uint8_t lcd_dataRead(void)
        /* Read data */
        LCD_SET_E;
        LCD_DELAY_READ;
-       data |= LCD_READ;
+       data = LCD_READ;
        LCD_CLR_E;
        LCD_DELAY_READ;
 
@@ -260,7 +319,7 @@ extern uint8_t Emul_LCDReadData(void);
 #endif /* ARCH_EMUL */
 
 
-/*!
+/**
  * Wait until the LCD busy flag clears.
  */
 void lcd_waitBusy(void)
@@ -274,7 +333,7 @@ void lcd_waitBusy(void)
 }
 
 
-/*!
+/**
  * Move the cursor to \a addr, only if not already there.
  */
 void lcd_moveTo(uint8_t addr)
@@ -282,13 +341,13 @@ void lcd_moveTo(uint8_t addr)
        if (addr != lcd_current_addr)
        {
                lcd_waitBusy();
-               lcd_regWrite(lcd_address[addr]);
+               lcd_regWrite(lcd_address(addr));
                lcd_current_addr = addr;
        }
 }
 
 
-/*!
+/**
  * Write a value in LCD data register, waiting for the busy flag.
  */
 void lcd_setReg(uint8_t val)
@@ -298,7 +357,7 @@ void lcd_setReg(uint8_t val)
 }
 
 #include <cfg/debug.h>
-/*!
+/**
  * Write the character \a c on display address \a addr.
  *
  * NOTE: argh, the HD44 lcd type is a bad beast: our
@@ -308,7 +367,7 @@ void lcd_setReg(uint8_t val)
 void lcd_putc(uint8_t addr, uint8_t c)
 {
        if (addr != lcd_current_addr)
-               lcd_setReg(lcd_address[addr]);
+               lcd_setReg(lcd_address(addr));
 
        lcd_waitBusy();
        lcd_dataWrite(c);
@@ -320,11 +379,11 @@ void lcd_putc(uint8_t addr, uint8_t c)
 
        /* If we are at the end of a row put the cursor at the beginning of the next */
        if (!(lcd_current_addr % LCD_COLS))
-               lcd_setReg(lcd_address[lcd_current_addr]);
+               lcd_setReg(lcd_address(lcd_current_addr));
 }
 
 
-/*!
+/**
  * Remap the glyph of a character.
  *
  * glyph - bitmap of 8x8 bits.
@@ -345,7 +404,7 @@ void lcd_remapChar(const char *glyph, char code)
        }
 
        /* Move back to original address */
-       lcd_setReg(lcd_address[lcd_current_addr]);
+       lcd_setReg(lcd_address(lcd_current_addr));
 }
 
 
@@ -388,8 +447,9 @@ void lcd_hw_init(void)
        lcd_regWrite(LCD_CMD_CLEAR);
        timer_delay(2);
 
-       //lcd_regWrite(LCD_CMD_RESET_DDRAM); 4 bit mode doesn't allow char reprogramming
-
+#if !CONFIG_LCD_4BIT
+       lcd_regWrite(LCD_CMD_RESET_DDRAM); // 4 bit mode doesn't allow char reprogramming
+#endif
        lcd_regWrite(LCD_CMD_DISPLAYMODE);
        timer_delay(2);
 }