471 lines
16 KiB
C
471 lines
16 KiB
C
/*! \file lcd.c \brief Character LCD driver for HD44780/SED1278 displays. */
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//*****************************************************************************
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//
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// File Name : 'lcd.c'
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// Title : Character LCD driver for HD44780/SED1278 displays
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// (usable in mem-mapped, or I/O mode)
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// Author : Pascal Stang
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// Created : 11/22/2000
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// Revised : 4/30/2002
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// Version : 1.1
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// Target MCU : Atmel AVR series
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// Editor Tabs : 4
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//
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// This code is distributed under the GNU Public License
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// which can be found at http://www.gnu.org/licenses/gpl.txt
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//
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//*****************************************************************************
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#include <avr/io.h>
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#include <avr/pgmspace.h>
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#include "global.h"
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#include "timer.h"
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#include "lcd.h"
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// custom LCD characters
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unsigned const char __attribute__ ((progmem)) LcdCustomChar[] =
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{
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0x00, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x1F, 0x00, // 0. 0/5 full progress block
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0x00, 0x1F, 0x10, 0x10, 0x10, 0x10, 0x1F, 0x00, // 1. 1/5 full progress block
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0x00, 0x1F, 0x18, 0x18, 0x18, 0x18, 0x1F, 0x00, // 2. 2/5 full progress block
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0x00, 0x1F, 0x1C, 0x1C, 0x1C, 0x1C, 0x1F, 0x00, // 3. 3/5 full progress block
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0x00, 0x1F, 0x1E, 0x1E, 0x1E, 0x1E, 0x1F, 0x00, // 4. 4/5 full progress block
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0x00, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00, // 5. 5/5 full progress block
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0x03, 0x07, 0x0F, 0x1F, 0x0F, 0x07, 0x03, 0x00, // 6. rewind arrow
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0x00, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00, // 7. stop block
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0x1B, 0x1B, 0x1B, 0x1B, 0x1B, 0x1B, 0x1B, 0x00, // 8. pause bars
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0x18, 0x1C, 0x1E, 0x1F, 0x1E, 0x1C, 0x18, 0x00, // 9. fast-forward arrow
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0x00, 0x04, 0x04, 0x0E, 0x0E, 0x1F, 0x1F, 0x00, // 10. scroll up arrow
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0x00, 0x1F, 0x1F, 0x0E, 0x0E, 0x04, 0x04, 0x00, // 11. scroll down arrow
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 12. blank character
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0x00, 0x0E, 0x19, 0x15, 0x13, 0x0E, 0x00, 0x00, // 13. animated play icon frame 0
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0x00, 0x0E, 0x15, 0x15, 0x15, 0x0E, 0x00, 0x00, // 14. animated play icon frame 1
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0x00, 0x0E, 0x13, 0x15, 0x19, 0x0E, 0x00, 0x00, // 15. animated play icon frame 2
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0x00, 0x0E, 0x11, 0x1F, 0x11, 0x0E, 0x00, 0x00, // 16. animated play icon frame 3
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};
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/*************************************************************/
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/********************** LOCAL FUNCTIONS **********************/
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/*************************************************************/
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void lcdInitHW(void)
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{
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// initialize I/O ports
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// if I/O interface is in use
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#ifdef LCD_PORT_INTERFACE
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// initialize LCD control lines
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cbi(LCD_CTRL_PORT, LCD_CTRL_RS);
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cbi(LCD_CTRL_PORT, LCD_CTRL_RW);
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cbi(LCD_CTRL_PORT, LCD_CTRL_E);
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// initialize LCD control lines to output
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sbi(LCD_CTRL_DDR, LCD_CTRL_RS);
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sbi(LCD_CTRL_DDR, LCD_CTRL_RW);
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sbi(LCD_CTRL_DDR, LCD_CTRL_E);
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// initialize LCD data port to input
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// initialize LCD data lines to pull-up
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#ifdef LCD_DATA_4BIT
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outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit)
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outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit)
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#else
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outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit)
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outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit)
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#endif
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#else
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// enable external memory bus if not already enabled
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sbi(MCUCR, SRE); // enable bus interface
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#endif
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}
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void lcdBusyWait(void)
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{
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// wait until LCD busy bit goes to zero
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// do a read from control register
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#ifdef LCD_PORT_INTERFACE
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cbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "control"
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#ifdef LCD_DATA_4BIT
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outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit)
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outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit)
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#else
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outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit)
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outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit)
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#endif
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sbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "read"
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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while(inb(LCD_DATA_PIN) & 1<<LCD_BUSY)
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{
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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#ifdef LCD_DATA_4BIT // do an extra clock for 4 bit reads
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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#endif
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}
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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// leave data lines in input mode so they can be most easily used for other purposes
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#else
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// memory bus read
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// sbi(MCUCR, SRW); // enable RAM waitstate
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// wait until LCD busy bit goes to zero
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while( (*((volatile unsigned char *) (LCD_CTRL_ADDR))) & (1<<LCD_BUSY) );
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// cbi(MCUCR, SRW); // disable RAM waitstate
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#endif
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}
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void lcdControlWrite(u08 data)
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{
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// write the control byte to the display controller
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#ifdef LCD_PORT_INTERFACE
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lcdBusyWait(); // wait until LCD not busy
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cbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "control"
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cbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "write"
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#ifdef LCD_DATA_4BIT
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// 4 bit write
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)|0xF0); // set data I/O lines to output (4bit)
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outb(LCD_DATA_POUT, (inb(LCD_DATA_POUT)&0x0F) | (data&0xF0) ); // output data, high 4 bits
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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outb(LCD_DATA_POUT, (inb(LCD_DATA_POUT)&0x0F) | (data<<4) ); // output data, low 4 bits
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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#else
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// 8 bit write
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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outb(LCD_DATA_DDR, 0xFF); // set data I/O lines to output (8bit)
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outb(LCD_DATA_POUT, data); // output data, 8bits
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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#endif
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// leave data lines in input mode so they can be most easily used for other purposes
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#ifdef LCD_DATA_4BIT
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outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit)
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outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit)
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#else
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outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit)
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outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit)
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#endif
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#else
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// memory bus write
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//sbi(MCUCR, SRW); // enable RAM waitstate
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lcdBusyWait(); // wait until LCD not busy
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*((volatile unsigned char *) (LCD_CTRL_ADDR)) = data;
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//cbi(MCUCR, SRW); // disable RAM waitstate
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#endif
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}
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u08 lcdControlRead(void)
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{
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// read the control byte from the display controller
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register u08 data;
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#ifdef LCD_PORT_INTERFACE
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lcdBusyWait(); // wait until LCD not busy
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#ifdef LCD_DATA_4BIT
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outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit)
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outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit)
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#else
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outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit)
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outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit)
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#endif
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cbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "control"
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sbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "read"
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#ifdef LCD_DATA_4BIT
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// 4 bit read
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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data = inb(LCD_DATA_PIN)&0xF0; // input data, high 4 bits
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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data |= inb(LCD_DATA_PIN)>>4; // input data, low 4 bits
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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#else
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// 8 bit read
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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data = inb(LCD_DATA_PIN); // input data, 8bits
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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#endif
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// leave data lines in input mode so they can be most easily used for other purposes
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#else
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//sbi(MCUCR, SRW); // enable RAM waitstate
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lcdBusyWait(); // wait until LCD not busy
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data = *((volatile unsigned char *) (LCD_CTRL_ADDR));
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//cbi(MCUCR, SRW); // disable RAM waitstate
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#endif
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return data;
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}
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void lcdDataWrite(u08 data)
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{
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// write a data byte to the display
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#ifdef LCD_PORT_INTERFACE
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lcdBusyWait(); // wait until LCD not busy
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sbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "data"
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cbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "write"
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#ifdef LCD_DATA_4BIT
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// 4 bit write
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)|0xF0); // set data I/O lines to output (4bit)
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outb(LCD_DATA_POUT, (inb(LCD_DATA_POUT)&0x0F) | (data&0xF0) ); // output data, high 4 bits
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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outb(LCD_DATA_POUT, (inb(LCD_DATA_POUT)&0x0F) | (data<<4) ); // output data, low 4 bits
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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#else
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// 8 bit write
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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outb(LCD_DATA_DDR, 0xFF); // set data I/O lines to output (8bit)
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outb(LCD_DATA_POUT, data); // output data, 8bits
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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#endif
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// leave data lines in input mode so they can be most easily used for other purposes
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#ifdef LCD_DATA_4BIT
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outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit)
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outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit)
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#else
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outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit)
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outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit)
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#endif
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#else
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// memory bus write
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//sbi(MCUCR, SRW); // enable RAM waitstate
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lcdBusyWait(); // wait until LCD not busy
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*((volatile unsigned char *) (LCD_DATA_ADDR)) = data;
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//cbi(MCUCR, SRW); // disable RAM waitstate
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#endif
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}
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u08 lcdDataRead(void)
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{
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// read a data byte from the display
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register u08 data;
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#ifdef LCD_PORT_INTERFACE
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lcdBusyWait(); // wait until LCD not busy
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#ifdef LCD_DATA_4BIT
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outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit)
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outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit)
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#else
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outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit)
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outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit)
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#endif
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sbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "data"
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sbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "read"
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#ifdef LCD_DATA_4BIT
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// 4 bit read
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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data = inb(LCD_DATA_PIN)&0xF0; // input data, high 4 bits
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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data |= inb(LCD_DATA_PIN)>>4; // input data, low 4 bits
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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#else
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// 8 bit read
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sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line
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LCD_DELAY; // wait
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LCD_DELAY; // wait
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data = inb(LCD_DATA_PIN); // input data, 8bits
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cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line
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#endif
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// leave data lines in input mode so they can be most easily used for other purposes
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#else
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// memory bus read
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//sbi(MCUCR, SRW); // enable RAM waitstate
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lcdBusyWait(); // wait until LCD not busy
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data = *((volatile unsigned char *) (LCD_DATA_ADDR));
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//cbi(MCUCR, SRW); // disable RAM waitstate
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#endif
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return data;
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}
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/*************************************************************/
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/********************* PUBLIC FUNCTIONS **********************/
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/*************************************************************/
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void lcdInit()
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{
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// initialize hardware
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lcdInitHW();
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// LCD function set
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lcdControlWrite(LCD_FUNCTION_DEFAULT);
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// clear LCD
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lcdControlWrite(1<<LCD_CLR);
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delay(60000); // wait 60ms
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// set entry mode
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lcdControlWrite(1<<LCD_ENTRY_MODE | 1<<LCD_ENTRY_INC);
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// set display to on
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//lcdControlWrite(1<<LCD_ON_CTRL | 1<<LCD_ON_DISPLAY | 1<<LCD_ON_BLINK);
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lcdControlWrite(1<<LCD_ON_CTRL | 1<<LCD_ON_DISPLAY );
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// move cursor to home
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lcdControlWrite(1<<LCD_HOME);
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// set data address to 0
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lcdControlWrite(1<<LCD_DDRAM | 0x00);
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// load the first 8 custom characters
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lcdLoadCustomChar((u08*)LcdCustomChar,0,0);
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lcdLoadCustomChar((u08*)LcdCustomChar,1,1);
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lcdLoadCustomChar((u08*)LcdCustomChar,2,2);
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lcdLoadCustomChar((u08*)LcdCustomChar,3,3);
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lcdLoadCustomChar((u08*)LcdCustomChar,4,4);
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lcdLoadCustomChar((u08*)LcdCustomChar,5,5);
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lcdLoadCustomChar((u08*)LcdCustomChar,6,6);
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lcdLoadCustomChar((u08*)LcdCustomChar,7,7);
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}
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void lcdHome(void)
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{
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// move cursor to home
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lcdControlWrite(1<<LCD_HOME);
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}
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void lcdClear(void)
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{
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// clear LCD
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lcdControlWrite(1<<LCD_CLR);
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}
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void lcdGotoXY(u08 x, u08 y)
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{
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register u08 DDRAMAddr;
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// remap lines into proper order
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switch(y)
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{
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case 0: DDRAMAddr = LCD_LINE0_DDRAMADDR+x; break;
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case 1: DDRAMAddr = LCD_LINE1_DDRAMADDR+x; break;
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case 2: DDRAMAddr = LCD_LINE2_DDRAMADDR+x; break;
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case 3: DDRAMAddr = LCD_LINE3_DDRAMADDR+x; break;
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default: DDRAMAddr = LCD_LINE0_DDRAMADDR+x;
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}
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// set data address
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lcdControlWrite(1<<LCD_DDRAM | DDRAMAddr);
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}
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void lcdLoadCustomChar(u08* lcdCustomCharArray, u08 romCharNum, u08 lcdCharNum)
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{
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register u08 i;
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u08 saveDDRAMAddr;
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// backup the current cursor position
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saveDDRAMAddr = lcdControlRead() & 0x7F;
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// multiply the character index by 8
|
|
lcdCharNum = (lcdCharNum<<3); // each character occupies 8 bytes
|
|
romCharNum = (romCharNum<<3); // each character occupies 8 bytes
|
|
|
|
// copy the 8 bytes into CG (character generator) RAM
|
|
for(i=0; i<8; i++)
|
|
{
|
|
// set CG RAM address
|
|
lcdControlWrite((1<<LCD_CGRAM) | (lcdCharNum+i));
|
|
// write character data
|
|
lcdDataWrite( pgm_read_byte(lcdCustomCharArray+romCharNum+i) );
|
|
}
|
|
|
|
// restore the previous cursor position
|
|
lcdControlWrite(1<<LCD_DDRAM | saveDDRAMAddr);
|
|
|
|
}
|
|
|
|
void lcdPrintData(char* data, u08 nBytes)
|
|
{
|
|
register u08 i;
|
|
|
|
// check to make sure we have a good pointer
|
|
if (!data) return;
|
|
|
|
// print data
|
|
for(i=0; i<nBytes; i++)
|
|
{
|
|
lcdDataWrite(data[i]);
|
|
}
|
|
}
|
|
|
|
#if (!defined(__AVR_AT90USB162__) && !defined(__AVR_AT90USB82__))
|
|
void lcdProgressBar(u16 progress, u16 maxprogress, u08 length)
|
|
{
|
|
u08 i;
|
|
u32 pixelprogress;
|
|
u08 c;
|
|
|
|
// draw a progress bar displaying (progress / maxprogress)
|
|
// starting from the current cursor position
|
|
// with a total length of "length" characters
|
|
// ***note, LCD chars 0-5 must be programmed as the bar characters
|
|
// char 0 = empty ... char 5 = full
|
|
|
|
// total pixel length of bargraph equals length*PROGRESSPIXELS_PER_CHAR;
|
|
// pixel length of bar itself is
|
|
pixelprogress = ((progress*(length*PROGRESSPIXELS_PER_CHAR))/maxprogress);
|
|
|
|
// print exactly "length" characters
|
|
for(i=0; i<length; i++)
|
|
{
|
|
// check if this is a full block, or partial or empty
|
|
// (u16) cast is needed to avoid sign comparison warning
|
|
if( ((i*(u16)PROGRESSPIXELS_PER_CHAR)+5) > pixelprogress )
|
|
{
|
|
// this is a partial or empty block
|
|
if( ((i*(u16)PROGRESSPIXELS_PER_CHAR)) > pixelprogress )
|
|
{
|
|
// this is an empty block
|
|
// use space character?
|
|
c = 0;
|
|
}
|
|
else
|
|
{
|
|
// this is a partial block
|
|
c = pixelprogress % PROGRESSPIXELS_PER_CHAR;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// this is a full block
|
|
c = 5;
|
|
}
|
|
|
|
// write character to display
|
|
lcdDataWrite(c);
|
|
}
|
|
|
|
}
|
|
#endif // #if (!defined(__AVR_AT90USB162__) || !defined(__AVR_AT90USB82__))
|