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/* $Id: drv_LCDTerm.c,v 1.5 2006/01/30 06:25:52 reinelt Exp $ * * driver for the LCDTerm serial-to-HD44780 adapter boards * http://www.bobblick.com/techref/projects/lcdterm/lcdterm.html * * Copyright (C) 2005 Michael Reinelt <reinelt@eunet.at> * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * $Log: drv_LCDTerm.c,v $ * Revision 1.5 2006/01/30 06:25:52 reinelt * added CVS Revision * * Revision 1.4 2005/05/08 04:32:44 reinelt * CodingStyle added and applied * * Revision 1.3 2005/01/22 22:57:57 reinelt * LCD-Linux driver added * * Revision 1.2 2005/01/18 06:30:23 reinelt * added (C) to all copyright statements * * Revision 1.1 2005/01/15 13:13:57 reinelt * LCDTerm driver added, take 2 * */ /* * * exported fuctions: * * struct DRIVER drv_LCDTerm * */ #include "config.h" #include <stdlib.h> #include <unistd.h> #include "debug.h" #include "cfg.h" #include "qprintf.h" #include "plugin.h" #include "widget.h" #include "widget_text.h" #include "widget_icon.h" #include "widget_bar.h" #include "drv.h" #include "drv_generic_text.h" #include "drv_generic_serial.h" #define LCD_CLEAR 0x03 #define LCD_CMD 0x12 #define LCD_DATA 0x14 static char Name[] = "LCDTerm"; /****************************************/ /*** hardware dependant functions ***/ /****************************************/ static void drv_LT_clear(void) { char cmd[1]; cmd[0] = LCD_CLEAR; /* clear display */ drv_generic_serial_write(cmd, 1); /* clear screen */ } static int drv_LT_send(const char request, const char value) { char buf[2]; buf[0] = request; buf[1] = value; drv_generic_serial_write(buf, 2); return 0; } static void drv_LT_command(const char cmd) { drv_LT_send(LCD_CMD, cmd); } static void drv_LT_write(const int row, const int col, const char *data, int len) { int pos; /* 16x4 Displays use a slightly different layout */ if (DCOLS == 16 && DROWS == 4) { pos = (row % 2) * 64 + (row / 2) * 16 + col; } else { pos = (row % 2) * 64 + (row / 2) * 20 + col; } drv_LT_command(0x80 | pos); while (len--) { drv_LT_send(LCD_DATA, *data++); } } static void drv_LT_defchar(const int ascii, const unsigned char *matrix) { int i; drv_LT_command(0x40 | 8 * ascii); for (i = 0; i < 8; i++) { drv_LT_send(LCD_DATA, *matrix++ & 0x1f); } } static int drv_LT_start(const char *section, const int quiet) { int rows = -1, cols = -1; char *s; if (drv_generic_serial_open(section, Name, 0) < 0) return -1; s = cfg_get(section, "Size", NULL); if (s == NULL || *s == '\0') { error("%s: no '%s.Size' entry from %s", Name, section, cfg_source()); return -1; } if (sscanf(s, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) { error("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source()); free(s); return -1; } DROWS = rows; DCOLS = cols; /* initialize display */ drv_LT_command(0x29); /* 8 Bit mode, 1/16 duty cycle, 5x8 font */ drv_LT_command(0x08); /* Display off, cursor off, blink off */ drv_LT_command(0x0c); /* Display on, cursor off, blink off */ drv_LT_command(0x06); /* curser moves to right, no shift */ drv_LT_clear(); /* clear display */ if (!quiet) { char buffer[40]; qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); if (drv_generic_text_greet(buffer, "www.bwct.de")) { sleep(3); drv_LT_clear(); } } return 0; } /****************************************/ /*** plugins ***/ /****************************************/ /* none */ /****************************************/ /*** widget callbacks ***/ /****************************************/ /* using drv_generic_text_draw(W) */ /* using drv_generic_text_icon_draw(W) */ /* using drv_generic_text_bar_draw(W) */ /****************************************/ /*** exported functions ***/ /****************************************/ /* list models */ int drv_LT_list(void) { printf("generic"); return 0; } /* initialize driver & display */ int drv_LT_init(const char *section, const int quiet) { WIDGET_CLASS wc; int asc255bug; int ret; info("%s: %s", Name, "$Revision: 1.5 $"); /* display preferences */ XRES = 5; /* pixel width of one char */ YRES = 8; /* pixel height of one char */ CHARS = 8; /* number of user-defineable characters */ CHAR0 = 0; /* ASCII of first user-defineable char */ /* Fixme: */ GOTO_COST = 2; /* number of bytes a goto command requires */ /* real worker functions */ drv_generic_text_real_write = drv_LT_write; drv_generic_text_real_defchar = drv_LT_defchar; /* start display */ if ((ret = drv_LT_start(section, quiet)) != 0) return ret; /* initialize generic text driver */ if ((ret = drv_generic_text_init(section, Name)) != 0) return ret; /* initialize generic icon driver */ if ((ret = drv_generic_text_icon_init()) != 0) return ret; /* initialize generic bar driver */ if ((ret = drv_generic_text_bar_init(0)) != 0) return ret; /* add fixed chars to the bar driver */ /* most displays have a full block on ascii 255, but some have kind of */ /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */ /* char will not be used, but rendered by the bar driver */ cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug); drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */ if (!asc255bug) drv_generic_text_bar_add_segment(255, 255, 255, 255); /* ASCII 255 = block */ /* register text widget */ wc = Widget_Text; wc.draw = drv_generic_text_draw; widget_register(&wc); /* register icon widget */ wc = Widget_Icon; wc.draw = drv_generic_text_icon_draw; widget_register(&wc); /* register bar widget */ wc = Widget_Bar; wc.draw = drv_generic_text_bar_draw; widget_register(&wc); /* register plugins */ /* none */ return 0; } /* close driver & display */ int drv_LT_quit(const int quiet) { info("%s: shutting down.", Name); drv_generic_text_quit(); /* clear display */ drv_LT_clear(); /* say goodbye... */ if (!quiet) { drv_generic_text_greet("goodbye!", NULL); } drv_generic_serial_close(); return (0); } DRIVER drv_LCDTerm = { name:Name, list:drv_LT_list, init:drv_LT_init, quit:drv_LT_quit, };


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