diff options
Diffstat (limited to 'drv_NULL.c')
| -rw-r--r-- | drv_NULL.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drv_NULL.c b/drv_NULL.c new file mode 100644 index 0000000..35459b6 --- /dev/null +++ b/drv_NULL.c @@ -0,0 +1,195 @@ +/* $Id: drv_NULL.c 975 2009-01-18 11:16:20Z michael $ + * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_NULL.c $ + * + * NULL driver (for testing) + * + * Copyright (C) 2004 Michael Reinelt <michael@reinelt.co.at> + * Copyright (C) 2004 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. + * + */ + +/* + * + * exported fuctions: + * + * struct DRIVER drv_NULL + * + */ + +#include "config.h" + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "debug.h" +#include "cfg.h" +#include "plugin.h" +#include "widget.h" +#include "widget_text.h" +#include "widget_bar.h" +#include "drv.h" +#include "drv_generic_text.h" + + +static char Name[] = "NULL"; + + +/****************************************/ +/*** hardware dependant functions ***/ +/****************************************/ + +static void drv_NULL_write(const __attribute__ ((unused)) + int row, const __attribute__ ((unused)) + int col, const __attribute__ ((unused)) + char *data, const __attribute__ ((unused)) + int len) +{ + /* empty */ +} + + +static void drv_NULL_defchar(const __attribute__ ((unused)) + int ascii, const __attribute__ ((unused)) + unsigned char *matrix) +{ + /* empty */ +} + + +static int drv_NULL_start(const char *section) +{ + char *s; + + s = cfg_get(section, "Size", "20x4"); + if (s == NULL || *s == '\0') { + error("%s: no '%s.Size' entry from %s", Name, section, cfg_source()); + free(s); + return -1; + } + if (sscanf(s, "%dx%d", &DCOLS, &DROWS) != 2 || DROWS < 1 || DCOLS < 1) { + error("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source()); + free(s); + return -1; + } + free(s); + + return 0; +} + + +/****************************************/ +/*** plugins ***/ +/****************************************/ + +/* none at the moment... */ + + +/****************************************/ +/*** widget callbacks ***/ +/****************************************/ + +/* using drv_generic_text_draw(W) */ +/* using drv_generic_text_bar_draw(W) */ + + +/****************************************/ +/*** exported functions ***/ +/****************************************/ + + +/* list models */ +int drv_NULL_list(void) +{ + printf("NULL driver for testing purposes"); + return 0; +} + + +/* initialize driver & display */ +int drv_NULL_init(const char *section, const __attribute__ ((unused)) + int quiet) +{ + WIDGET_CLASS wc; + int ret; + + info("%s: %s", Name, "$Rev: 975 $"); + + /* display preferences */ + XRES = 6; /* 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 */ + GOTO_COST = 2; /* number of bytes a goto command requires */ + + /* real worker functions */ + drv_generic_text_real_write = drv_NULL_write; + drv_generic_text_real_defchar = drv_NULL_defchar; + + /* start display */ + if ((ret = drv_NULL_start(section)) != 0) + return ret; + + /* initialize generic text driver */ + if ((ret = drv_generic_text_init(section, Name)) != 0) + return ret; + + /* initialize generic bar driver */ + if ((ret = drv_generic_text_bar_init(1)) != 0) + return ret; + + /* add fixed chars to the bar driver */ + drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */ + drv_generic_text_bar_add_segment(255, 255, 255, '*'); /* asterisk */ + + /* register text widget */ + wc = Widget_Text; + wc.draw = drv_generic_text_draw; + widget_register(&wc); + + /* register bar widget */ + wc = Widget_Bar; + wc.draw = drv_generic_text_bar_draw; + widget_register(&wc); + + /* register plugins */ + /* none at the moment... */ + + return 0; +} + + +/* close driver & display */ +int drv_NULL_quit(const __attribute__ ((unused)) + int quiet) +{ + + info("%s: shutting down.", Name); + drv_generic_text_quit(); + + return (0); +} + + +DRIVER drv_NULL = { + .name = Name, + .list = drv_NULL_list, + .init = drv_NULL_init, + .quit = drv_NULL_quit, +}; |