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Diffstat (limited to 'avr/tmp/lcd.h')
| -rw-r--r-- | avr/tmp/lcd.h | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/avr/tmp/lcd.h b/avr/tmp/lcd.h new file mode 100644 index 00000000..9ec85b5f --- /dev/null +++ b/avr/tmp/lcd.h @@ -0,0 +1,265 @@ +#ifndef LCD_H
+#define LCD_H
+/*************************************************************************
+ Title : C include file for the HD44780U LCD library (lcd.c)
+ Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
+ File: $Id: lcd.h,v 1.13.2.2 2006/01/30 19:51:33 peter Exp $
+ Software: AVR-GCC 3.3
+ Hardware: any AVR device, memory mapped mode only for AT90S4414/8515/Mega
+***************************************************************************/
+
+/**
+ @defgroup pfleury_lcd LCD library
+ @code #include <lcd.h> @endcode
+
+ @brief Basic routines for interfacing a HD44780U-based text LCD display
+
+ Originally based on Volker Oth's LCD library,
+ changed lcd_init(), added additional constants for lcd_command(),
+ added 4-bit I/O mode, improved and optimized code.
+
+ Library can be operated in memory mapped mode (LCD_IO_MODE=0) or in
+ 4-bit IO port mode (LCD_IO_MODE=1). 8-bit IO port mode not supported.
+
+ Memory mapped mode compatible with Kanda STK200, but supports also
+ generation of R/W signal through A8 address line.
+
+ @author Peter Fleury pfleury@gmx.ch http://jump.to/fleury
+
+ @see The chapter <a href="http://homepage.sunrise.ch/mysunrise/peterfleury/avr-lcd44780.html" target="_blank">Interfacing a HD44780 Based LCD to an AVR</a>
+ on my home page.
+
+*/
+
+/*@{*/
+
+#if (__GNUC__ * 100 + __GNUC_MINOR__) < 303
+#error "This library requires AVR-GCC 3.3 or later, update to newer AVR-GCC compiler !"
+#endif
+
+#include <inttypes.h>
+#include <avr/pgmspace.h>
+
+/**
+ * @name Definitions for MCU Clock Frequency
+ * Adapt the MCU clock frequency in Hz to your target.
+ */
+#define XTAL 4000000 /**< clock frequency in Hz, used to calculate delay timer */
+
+
+/**
+ * @name Definition for LCD controller type
+ * Use 0 for HD44780 controller, change to 1 for displays with KS0073 controller.
+ */
+#define LCD_CONTROLLER_KS0073 0 /**< Use 0 for HD44780 controller, 1 for KS0073 controller */
+
+/**
+ * @name Definitions for Display Size
+ * Change these definitions to adapt setting to your display
+ */
+#define LCD_LINES 4 /**< number of visible lines of the display */
+#define LCD_DISP_LENGTH 20 /**< visibles characters per line of the display */
+#define LCD_LINE_LENGTH 0x40 /**< internal line length of the display */
+#define LCD_START_LINE1 0x00 /**< DDRAM address of first char of line 1 */
+#define LCD_START_LINE2 0x40 /**< DDRAM address of first char of line 2 */
+#define LCD_START_LINE3 0x14 /**< DDRAM address of first char of line 3 */
+#define LCD_START_LINE4 0x54 /**< DDRAM address of first char of line 4 */
+#define LCD_WRAP_LINES 0 /**< 0: no wrap, 1: wrap at end of visibile line */
+
+
+#define LCD_IO_MODE 1 /**< 0: memory mapped mode, 1: IO port mode */
+#if LCD_IO_MODE
+/**
+ * @name Definitions for 4-bit IO mode
+ * Change LCD_PORT if you want to use a different port for the LCD pins.
+ *
+ * The four LCD data lines and the three control lines RS, RW, E can be on the
+ * same port or on different ports.
+ * Change LCD_RS_PORT, LCD_RW_PORT, LCD_E_PORT if you want the control lines on
+ * different ports.
+ *
+ * Normally the four data lines should be mapped to bit 0..3 on one port, but it
+ * is possible to connect these data lines in different order or even on different
+ * ports by adapting the LCD_DATAx_PORT and LCD_DATAx_PIN definitions.
+ *
+ */
+#define LCD_PORT PORTD /**< port for the LCD lines */
+#define LCD_DATA0_PORT LCD_PORT /**< port for 4bit data bit 0 */
+#define LCD_DATA1_PORT LCD_PORT /**< port for 4bit data bit 1 */
+#define LCD_DATA2_PORT LCD_PORT /**< port for 4bit data bit 2 */
+#define LCD_DATA3_PORT LCD_PORT /**< port for 4bit data bit 3 */
+#define LCD_DATA0_PIN 0 /**< pin for 4bit data bit 0 */
+#define LCD_DATA1_PIN 1 /**< pin for 4bit data bit 1 */
+#define LCD_DATA2_PIN 2 /**< pin for 4bit data bit 2 */
+#define LCD_DATA3_PIN 3 /**< pin for 4bit data bit 3 */
+#define LCD_RS_PORT LCD_PORT /**< port for RS line */
+#define LCD_RS_PIN 5 /**< pin for RS line */
+#define LCD_RW_PORT LCD_PORT /**< port for RW line */
+#define LCD_RW_PIN 7 /**< pin for RW line */
+#define LCD_E_PORT LCD_PORT /**< port for Enable line */
+#define LCD_E_PIN 4 /**< pin for Enable line */
+
+#elif defined(__AVR_AT90S4414__) || defined(__AVR_AT90S8515__) || defined(__AVR_ATmega64__) || \
+ defined(__AVR_ATmega8515__)|| defined(__AVR_ATmega103__) || defined(__AVR_ATmega128__) || \
+ defined(__AVR_ATmega161__) || defined(__AVR_ATmega162__)
+/*
+ * memory mapped mode is only supported when the device has an external data memory interface
+ */
+#define LCD_IO_DATA 0xC000 /* A15=E=1, A14=RS=1 */
+#define LCD_IO_FUNCTION 0x8000 /* A15=E=1, A14=RS=0 */
+#define LCD_IO_READ 0x0100 /* A8 =R/W=1 (R/W: 1=Read, 0=Write */
+#else
+#error "external data memory interface not available for this device, use 4-bit IO port mode"
+
+#endif
+
+
+/**
+ * @name Definitions for LCD command instructions
+ * The constants define the various LCD controller instructions which can be passed to the
+ * function lcd_command(), see HD44780 data sheet for a complete description.
+ */
+
+/* instruction register bit positions, see HD44780U data sheet */
+#define LCD_CLR 0 /* DB0: clear display */
+#define LCD_HOME 1 /* DB1: return to home position */
+#define LCD_ENTRY_MODE 2 /* DB2: set entry mode */
+#define LCD_ENTRY_INC 1 /* DB1: 1=increment, 0=decrement */
+#define LCD_ENTRY_SHIFT 0 /* DB2: 1=display shift on */
+#define LCD_ON 3 /* DB3: turn lcd/cursor on */
+#define LCD_ON_DISPLAY 2 /* DB2: turn display on */
+#define LCD_ON_CURSOR 1 /* DB1: turn cursor on */
+#define LCD_ON_BLINK 0 /* DB0: blinking cursor ? */
+#define LCD_MOVE 4 /* DB4: move cursor/display */
+#define LCD_MOVE_DISP 3 /* DB3: move display (0-> cursor) ? */
+#define LCD_MOVE_RIGHT 2 /* DB2: move right (0-> left) ? */
+#define LCD_FUNCTION 5 /* DB5: function set */
+#define LCD_FUNCTION_8BIT 4 /* DB4: set 8BIT mode (0->4BIT mode) */
+#define LCD_FUNCTION_2LINES 3 /* DB3: two lines (0->one line) */
+#define LCD_FUNCTION_10DOTS 2 /* DB2: 5x10 font (0->5x7 font) */
+#define LCD_CGRAM 6 /* DB6: set CG RAM address */
+#define LCD_DDRAM 7 /* DB7: set DD RAM address */
+#define LCD_BUSY 7 /* DB7: LCD is busy */
+
+/* set entry mode: display shift on/off, dec/inc cursor move direction */
+#define LCD_ENTRY_DEC 0x04 /* display shift off, dec cursor move dir */
+#define LCD_ENTRY_DEC_SHIFT 0x05 /* display shift on, dec cursor move dir */
+#define LCD_ENTRY_INC_ 0x06 /* display shift off, inc cursor move dir */
+#define LCD_ENTRY_INC_SHIFT 0x07 /* display shift on, inc cursor move dir */
+
+/* display on/off, cursor on/off, blinking char at cursor position */
+#define LCD_DISP_OFF 0x08 /* display off */
+#define LCD_DISP_ON 0x0C /* display on, cursor off */
+#define LCD_DISP_ON_BLINK 0x0D /* display on, cursor off, blink char */
+#define LCD_DISP_ON_CURSOR 0x0E /* display on, cursor on */
+#define LCD_DISP_ON_CURSOR_BLINK 0x0F /* display on, cursor on, blink char */
+
+/* move cursor/shift display */
+#define LCD_MOVE_CURSOR_LEFT 0x10 /* move cursor left (decrement) */
+#define LCD_MOVE_CURSOR_RIGHT 0x14 /* move cursor right (increment) */
+#define LCD_MOVE_DISP_LEFT 0x18 /* shift display left */
+#define LCD_MOVE_DISP_RIGHT 0x1C /* shift display right */
+
+/* function set: set interface data length and number of display lines */
+#define LCD_FUNCTION_4BIT_1LINE 0x20 /* 4-bit interface, single line, 5x7 dots */
+#define LCD_FUNCTION_4BIT_2LINES 0x28 /* 4-bit interface, dual line, 5x7 dots */
+#define LCD_FUNCTION_8BIT_1LINE 0x30 /* 8-bit interface, single line, 5x7 dots */
+#define LCD_FUNCTION_8BIT_2LINES 0x38 /* 8-bit interface, dual line, 5x7 dots */
+
+
+#define LCD_MODE_DEFAULT ((1<<LCD_ENTRY_MODE) | (1<<LCD_ENTRY_INC) )
+
+
+
+/**
+ * @name Functions
+ */
+
+
+/**
+ @brief Initialize display and select type of cursor
+ @param dispAttr \b LCD_DISP_OFF display off\n
+ \b LCD_DISP_ON display on, cursor off\n
+ \b LCD_DISP_ON_CURSOR display on, cursor on\n
+ \b LCD_DISP_ON_CURSOR_BLINK display on, cursor on flashing
+ @return none
+*/
+extern void lcd_init(uint8_t dispAttr);
+
+
+/**
+ @brief Clear display and set cursor to home position
+ @param void
+ @return none
+*/
+extern void lcd_clrscr(void);
+
+
+/**
+ @brief Set cursor to home position
+ @param void
+ @return none
+*/
+extern void lcd_home(void);
+
+
+/**
+ @brief Set cursor to specified position
+
+ @param x horizontal position\n (0: left most position)
+ @param y vertical position\n (0: first line)
+ @return none
+*/
+extern void lcd_gotoxy(uint8_t x, uint8_t y);
+
+
+/**
+ @brief Display character at current cursor position
+ @param c character to be displayed
+ @return none
+*/
+extern void lcd_putc(char c);
+
+
+/**
+ @brief Display string without auto linefeed
+ @param s string to be displayed
+ @return none
+*/
+extern void lcd_puts(const char *s);
+
+
+/**
+ @brief Display string from program memory without auto linefeed
+ @param s string from program memory be be displayed
+ @return none
+ @see lcd_puts_P
+*/
+extern void lcd_puts_p(const char *progmem_s);
+
+
+/**
+ @brief Send LCD controller instruction command
+ @param cmd instruction to send to LCD controller, see HD44780 data sheet
+ @return none
+*/
+extern void lcd_command(uint8_t cmd);
+
+
+/**
+ @brief Send data byte to LCD controller
+
+ Similar to lcd_putc(), but without interpreting LF
+ @param data byte to send to LCD controller, see HD44780 data sheet
+ @return none
+*/
+extern void lcd_data(uint8_t data);
+
+
+/**
+ @brief macros for automatically storing string constant in program memory
+*/
+#define lcd_puts_P(__s) lcd_puts_p(PSTR(__s))
+
+/*@}*/
+#endif //LCD_H
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