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| /*! \file lcdconf.h \brief Character LCD driver configuration. */ |
| //***************************************************************************** |
| // |
| // File Name : 'lcdconf.h' |
| // Title : Character LCD driver for HD44780/SED1278 displays |
| // (usable in mem-mapped, or I/O mode) |
| // Author : Pascal Stang - Copyright (C) 2000-2002 |
| // Created : 11/22/2000 |
| // Revised : 4/30/2002 |
| // Version : 1.1 |
| // Target MCU : Atmel AVR series |
| // Editor Tabs : 4 |
| // |
| // This code is distributed under the GNU Public License |
| // which can be found at http://www.gnu.org/licenses/gpl.txt |
| // |
| //***************************************************************************** |
| |
| #ifndef LCDCONF_H |
| #define LCDCONF_H |
| |
| // Define type of interface used to access the LCD |
| // LCD_MEMORY_INTERFACE: |
| // To use this mode you must supply the necessary hardware to connect the |
| // LCD to the CPU's memory bus. The CONTROL and DATA registers of the LCD |
| // (HD44780 chip) must appear in the CPU's memory map. This mode is faster |
| // than the port interface but requires a little extra hardware to make it |
| // work. It is especially useful when your CPU is already configured to |
| // use an external memory bus for other purposes (like accessing memory). |
| // |
| // LCD_PORT_INTERFACE: |
| // This mode allows you to connect the control and data lines of the LCD |
| // directly to the I/O port pins (no interfacing hardware is needed), |
| // but it generally runs slower than the LCD_MEMORY_INTERFACE. |
| // Depending on your needs, when using the LCD_PORT_INTERFACE, the LCD may |
| // be accessed in 8-bit or 4-bit mode. In 8-bit mode, one whole I/O port |
| // (pins 0-7) is required for the LCD data lines, but transfers are faster. |
| // In 4-bit mode, only I/O port pins 4-7 are needed for data lines, but LCD |
| // access is slower. In either mode, three additional port pins are |
| // required for the LCD interface control lines (RS, R/W, and E). |
| |
| // Enable one of the following interfaces to your LCD |
| //#define LCD_MEMORY_INTERFACE |
| #define LCD_PORT_INTERFACE |
| |
| // Enter the parameters for your chosen interface' |
| // if you chose the LCD_PORT_INTERFACE: |
| #ifdef LCD_PORT_INTERFACE |
| #ifndef LCD_CTRL_PORT |
| // port and pins you will use for control lines |
| #define LCD_CTRL_PORT PORTC |
| #define LCD_CTRL_DDR DDRC |
| #define LCD_CTRL_RS 2 |
| #define LCD_CTRL_RW 3 |
| #define LCD_CTRL_E 4 |
| #endif |
| #ifndef LCD_DATA_POUT |
| // port you will use for data lines |
| #define LCD_DATA_POUT PORTA |
| #define LCD_DATA_PIN PINA |
| #define LCD_DATA_DDR DDRA |
| // access mode you will use (default is 8bit unless 4bit is selected) |
| #define LCD_DATA_4BIT |
| #endif |
| #endif |
| |
| // if you chose the LCD_MEMORY_INTERFACE: |
| #ifdef LCD_MEMORY_INTERFACE |
| #ifndef LCD_CTRL_ADDR |
| // CPU memory address of the LCD control register |
| #define LCD_CTRL_ADDR 0x1000 |
| #endif |
| #ifndef LCD_DATA_ADDR |
| // CPU memory address of the LCD data register |
| #define LCD_DATA_ADDR 0x1001 |
| #endif |
| #endif |
| |
| |
| // LCD display geometry |
| // change these definitions to adapt settings |
| #define LCD_LINES 2 // visible lines |
| #define LCD_LINE_LENGTH 16 // line length (in characters) |
| // cursor position to DDRAM mapping |
| #define LCD_LINE0_DDRAMADDR 0x00 |
| #define LCD_LINE1_DDRAMADDR 0x40 |
| #define LCD_LINE2_DDRAMADDR 0x14 |
| #define LCD_LINE3_DDRAMADDR 0x54 |
| |
| // LCD delay |
| // This delay affects how quickly accesses are made to the LCD controller. |
| // The HD44780 LCD controller requires an access time of at least 1us. |
| // LCD_DELAY should be scaled to take at least half that time (500us). |
| // Each NOP takes 1 CPU clock cycle to execute. Thus, at 4MHz, you should |
| // use at least 2 NOPs, at 8MHz at least 4 NOPs, etc. |
| // You can also use the delay_us(xx) command for longer access times. |
| |
| // LCD_DELAY is now automatically set in lcd.h, |
| // however, if you define it here, this definition will override the automatic setting |
| |
| // use this for a fail-safe delay |
| //#define LCD_DELAY delay_us(5); |
| |
| #endif |