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library

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Blame information for rev 6

Line No.	Rev	Author	Line
1	6	kaklik	`/! \file lcdconf.h \brief Character LCD driver configuration. /`
2			`//*****************************************************************************`
3			`//`
4			`// File Name : 'lcdconf.h'`
5			`// Title : Character LCD driver for HD44780/SED1278 displays`
6			`// (usable in mem-mapped, or I/O mode)`
7			`// Author : Pascal Stang - Copyright (C) 2000-2002`
8			`// Created : 11/22/2000`
9			`// Revised : 4/30/2002`
10			`// Version : 1.1`
11			`// Target MCU : Atmel AVR series`
12			`// Editor Tabs : 4`
13			`//`
14			`// This code is distributed under the GNU Public License`
15			`// which can be found at http://www.gnu.org/licenses/gpl.txt`
16			`//`
17			`//*****************************************************************************`
18
19			`#ifndef LCDCONF_H`
20			`#define LCDCONF_H`
21
22			`// Define type of interface used to access the LCD`
23			`// LCD_MEMORY_INTERFACE:`
24			`// To use this mode you must supply the necessary hardware to connect the`
25			`// LCD to the CPU's memory bus. The CONTROL and DATA registers of the LCD`
26			`// (HD44780 chip) must appear in the CPU's memory map. This mode is faster`
27			`// than the port interface but requires a little extra hardware to make it`
28			`// work. It is especially useful when your CPU is already configured to`
29			`// use an external memory bus for other purposes (like accessing memory).`
30			`//`
31			`// LCD_PORT_INTERFACE:`
32			`// This mode allows you to connect the control and data lines of the LCD`
33			`// directly to the I/O port pins (no interfacing hardware is needed),`
34			`// but it generally runs slower than the LCD_MEMORY_INTERFACE.`
35			`// Depending on your needs, when using the LCD_PORT_INTERFACE, the LCD may`
36			`// be accessed in 8-bit or 4-bit mode. In 8-bit mode, one whole I/O port`
37			`// (pins 0-7) is required for the LCD data lines, but transfers are faster.`
38			`// In 4-bit mode, only I/O port pins 4-7 are needed for data lines, but LCD`
39			`// access is slower. In either mode, three additional port pins are`
40			`// required for the LCD interface control lines (RS, R/W, and E).`
41
42			`// Enable one of the following interfaces to your LCD`
43			`//#define LCD_MEMORY_INTERFACE`
44			`#define LCD_PORT_INTERFACE`
45
46			`// Enter the parameters for your chosen interface'`
47			`// if you chose the LCD_PORT_INTERFACE:`
48			`#ifdef LCD_PORT_INTERFACE`
49			`#ifndef LCD_CTRL_PORT`
50			`// port and pins you will use for control lines`
51			`#define LCD_CTRL_PORT PORTC`
52			`#define LCD_CTRL_DDR DDRC`
53			`#define LCD_CTRL_RS 2`
54			`#define LCD_CTRL_RW 3`
55			`#define LCD_CTRL_E 4`
56			`#endif`
57			`#ifndef LCD_DATA_POUT`
58			`// port you will use for data lines`
59			`#define LCD_DATA_POUT PORTA`
60			`#define LCD_DATA_PIN PINA`
61			`#define LCD_DATA_DDR DDRA`
62			`// access mode you will use (default is 8bit unless 4bit is selected)`
63			`//#define LCD_DATA_4BIT`
64			`#endif`
65			`#endif`
66
67			`// if you chose the LCD_MEMORY_INTERFACE:`
68			`#ifdef LCD_MEMORY_INTERFACE`
69			`#ifndef LCD_CTRL_ADDR`
70			`// CPU memory address of the LCD control register`
71			`#define LCD_CTRL_ADDR 0x1000`
72			`#endif`
73			`#ifndef LCD_DATA_ADDR`
74			`// CPU memory address of the LCD data register`
75			`#define LCD_DATA_ADDR 0x1001`
76			`#endif`
77			`#endif`
78
79
80			`// LCD display geometry`
81			`// change these definitions to adapt settings`
82			`#define LCD_LINES 4 // visible lines`
83			`#define LCD_LINE_LENGTH 20 // line length (in characters)`
84			`// cursor position to DDRAM mapping`
85			`#define LCD_LINE0_DDRAMADDR 0x00`
86			`#define LCD_LINE1_DDRAMADDR 0x40`
87			`#define LCD_LINE2_DDRAMADDR 0x14`
88			`#define LCD_LINE3_DDRAMADDR 0x54`
89
90			`// LCD delay`
91			`// This delay affects how quickly accesses are made to the LCD controller.`
92			`// The HD44780 LCD controller requires an access time of at least 1us.`
93			`// LCD_DELAY should be scaled to take at least half that time (500us).`
94			`// Each NOP takes 1 CPU clock cycle to execute. Thus, at 4MHz, you should`
95			`// use at least 2 NOPs, at 8MHz at least 4 NOPs, etc.`
96			`// You can also use the delay_us(xx) command for longer access times.`
97
98			`// LCD_DELAY is now automatically set in lcd.h,`
99			`// however, if you define it here, this definition will override the automatic setting`
100
101			`// use this for a fail-safe delay`
102			`//#define LCD_DELAY delay_us(5);`
103
104			`#endif`