-
Notifications
You must be signed in to change notification settings - Fork 0
/
lcd.h
executable file
·319 lines (264 loc) · 11.7 KB
/
lcd.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
#ifndef LCD_H
#define LCD_H
/*************************************************************************
Title : C include file for the HD44780U LCD library (lcd.c)
Author: Peter Fleury <[email protected]> http://tinyurl.com/peterfleury
File: $Id: lcd.h,v 1.14.2.4 2015/01/20 17:16:07 peter Exp $
Software: AVR-GCC 4.x
Hardware: any AVR device, memory mapped mode only for AVR with
memory mapped interface (AT90S8515/ATmega8515/ATmega128)
***************************************************************************/
/**
@mainpage
Collection of libraries for AVR-GCC
@author Peter Fleury [email protected] http://tinyurl.com/peterfleury
@copyright (C) 2015 Peter Fleury, GNU General Public License Version 3
@file
@defgroup pfleury_lcd LCD library <lcd.h>
@code #include <lcd.h> @endcode
@brief Basic routines for interfacing a HD44780U-based character LCD display
LCD character displays can be found in many devices, like espresso machines, laser printers.
The Hitachi HD44780 controller and its compatible controllers like Samsung KS0066U have become an industry standard for these types of displays.
This library allows easy interfacing with a HD44780 compatible display and can be
operated in memory mapped mode (LCD_IO_MODE defined as 0 in the include file lcd.h.) or in
4-bit IO port mode (LCD_IO_MODE defined as 1). 8-bit IO port mode is not supported.
Memory mapped mode is compatible with old Kanda STK200 starter kit, but also supports
generation of R/W signal through A8 address line.
@see The chapter <a href=" http://homepage.hispeed.ch/peterfleury/avr-lcd44780.html" target="_blank">Interfacing a HD44780 Based LCD to an AVR</a>
on my home page, which shows example circuits how to connect an LCD to an AVR controller.
@author Peter Fleury [email protected] http://tinyurl.com/peterfleury
@version 2.0
@copyright (C) 2015 Peter Fleury, GNU General Public License Version 3
*/
#include <inttypes.h>
#include <avr/pgmspace.h>
/**
* @name Definition for LCD controller type
* Use 0 for HD44780 controller, change to 1 for displays with KS0073 controller.
*/
#ifndef LCD_CONTROLLER_KS0073
#define LCD_CONTROLLER_KS0073 0 /**< Use 0 for HD44780 controller, 1 for KS0073 controller */
#endif
/**
* @name Definitions for Display Size
* Change these definitions to adapt setting to your display
*
* These definitions can be defined in a separate include file \b lcd_definitions.h instead modifying this file by
* adding -D_LCD_DEFINITIONS_FILE to the CDEFS section in the Makefile.
* All definitions added to the file lcd_definitions.h will override the default definitions from lcd.h
*
*/
#ifndef LCD_LINES
#define LCD_LINES 2 /**< number of visible lines of the display */
#endif
#ifndef LCD_DISP_LENGTH
#define LCD_DISP_LENGTH 16 /**< visibles characters per line of the display */
#endif
#ifndef LCD_LINE_LENGTH
#define LCD_LINE_LENGTH 0x40 /**< internal line length of the display */
#endif
#ifndef LCD_START_LINE1
#define LCD_START_LINE1 0x00 /**< DDRAM address of first char of line 1 */
#endif
#ifndef LCD_START_LINE2
#define LCD_START_LINE2 0x40 /**< DDRAM address of first char of line 2 */
#endif
#ifndef LCD_START_LINE3
#define LCD_START_LINE3 0x14 /**< DDRAM address of first char of line 3 */
#endif
#ifndef LCD_START_LINE4
#define LCD_START_LINE4 0x54 /**< DDRAM address of first char of line 4 */
#endif
#ifndef LCD_WRAP_LINES
#define LCD_WRAP_LINES 0 /**< 0: no wrap, 1: wrap at end of visibile line */
#endif
#define LCD_IO_MODE 1 /**< 0: memory mapped mode, 1: IO port mode */
#if LCD_IO_MODE
#ifndef LCD_PORT
#define LCD_PORT PORTD /**< port for the LCD lines */
#endif
#ifndef LCD_DATA0_PORT
#define LCD_DATA0_PORT PORTD /**< port for 4bit data bit 0 */
#endif
#ifndef LCD_DATA1_PORT
#define LCD_DATA1_PORT PORTD /**< port for 4bit data bit 1 */
#endif
#ifndef LCD_DATA2_PORT
#define LCD_DATA2_PORT PORTD /**< port for 4bit data bit 2 */
#endif
#ifndef LCD_DATA3_PORT
#define LCD_DATA3_PORT PORTD /**< port for 4bit data bit 3 */
#endif
#ifndef LCD_DATA0_PIN
#define LCD_DATA0_PIN PD2 /**< pin for 4bit data bit 0 */
#endif
#ifndef LCD_DATA1_PIN
#define LCD_DATA1_PIN PD3 /**< pin for 4bit data bit 1 */
#endif
#ifndef LCD_DATA2_PIN
#define LCD_DATA2_PIN PD4 /**< pin for 4bit data bit 2 */
#endif
#ifndef LCD_DATA3_PIN
#define LCD_DATA3_PIN PD5 /**< pin for 4bit data bit 3 */
#endif
#ifndef LCD_RS_PORT
#define LCD_RS_PORT PORTD /**< port for RS line */
#endif
#ifndef LCD_RS_PIN
#define LCD_RS_PIN PD6 /**< pin for RS line */
#endif
#ifndef LCD_RW_PORT
#define LCD_RW_PORT PORTD /**< port for RW line */
#endif
#ifndef LCD_RW_PIN
#define LCD_RW_PIN PD7 /**< pin for RW line */
#endif
#ifndef LCD_E_PORT
#define LCD_E_PORT PORTB /**< port for Enable line */
#endif
#ifndef LCD_E_PIN
#define LCD_E_PIN PB0 /**< pin for Enable line */
#endif
#endif
/**
* @name Definitions of delays
* Used to calculate delay timers.
* Adapt the F_CPU define in the Makefile to the clock frequency in Hz of your target
*
* These delay times can be adjusted, if some displays require different delays.\n
* These definitions can be defined in a separate include file \b lcd_definitions.h instead modifying this file by
* adding \b -D_LCD_DEFINITIONS_FILE to the \b CDEFS section in the Makefile.
* All definitions added to the file lcd_definitions.h will override the default definitions from lcd.h
*/
#ifndef LCD_DELAY_BOOTUP
#define LCD_DELAY_BOOTUP 16000 /**< delay in micro seconds after power-on */
#endif
#ifndef LCD_DELAY_INIT
#define LCD_DELAY_INIT 5000 /**< delay in micro seconds after initialization command sent */
#endif
#ifndef LCD_DELAY_INIT_REP
#define LCD_DELAY_INIT_REP 64 /**< delay in micro seconds after initialization command repeated */
#endif
#ifndef LCD_DELAY_INIT_4BIT
#define LCD_DELAY_INIT_4BIT 64 /**< delay in micro seconds after setting 4-bit mode */
#endif
#ifndef LCD_DELAY_BUSY_FLAG
#define LCD_DELAY_BUSY_FLAG 4 /**< time in micro seconds the address counter is updated after busy flag is cleared */
#endif
#ifndef LCD_DELAY_ENABLE_PULSE
#define LCD_DELAY_ENABLE_PULSE 1 /**< enable signal pulse width in micro seconds */
#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
@return none
*/
extern void lcd_clrscr(void);
/**
@brief Set cursor to home position
@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 progmem_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