diff options
author | reinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f> | 2005-12-18 16:18:36 +0000 |
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committer | reinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f> | 2005-12-18 16:18:36 +0000 |
commit | 0a40256cd918d386d0a7b9955322cf9aa0f9da8b (patch) | |
tree | 819babba1e548bbcd9fffef6875593e7ade8b57b /drv_generic_gpio.c | |
parent | 59524120cfc433dbf1095cf095d8035d21e69784 (diff) | |
download | lcd4linux-0a40256cd918d386d0a7b9955322cf9aa0f9da8b.tar.gz |
[lcd4linux @ 2005-12-18 16:18:34 by reinelt]
GPO's added again
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@602 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
Diffstat (limited to 'drv_generic_gpio.c')
-rw-r--r-- | drv_generic_gpio.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drv_generic_gpio.c b/drv_generic_gpio.c new file mode 100644 index 0000000..4e3a811 --- /dev/null +++ b/drv_generic_gpio.c @@ -0,0 +1,159 @@ +/* $Id: drv_generic_gpio.c,v 1.1 2005/12/18 16:18:36 reinelt Exp $ + * + * generic driver helper for GPO's + * + * 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_generic_gpio.c,v $ + * Revision 1.1 2005/12/18 16:18:36 reinelt + * GPO's added again + * + */ + +/* + * + * exported variables: + * + * extern int GPIS, GPOS; number of Inputs and Outputs + * + * + * these functions must be implemented by the real driver: + * + * void (*drv_generic_gpio_real_set) (const int num, const int val); + * sets GPO num to val + * + * int (*drv_generic_gpio_real_get) (const int num); + * reads GPI num + * + * + * exported fuctions: + * + * int drv_generic_gpio_init(const char *section, const char *driver); + * initializes the generic GPIO driver + * + * int drv_generic_gpio_clear(void); + * resets all GPO's + * + * int drv_generic_gpio_draw(WIDGET * W); + * 'draws' GPO widget + * calls drv_generic_gpio_real_set() + * + * int drv_generic_gpio_quit(void); + * closes the generic GPIO driver + * + */ + +#include "config.h" + +#include <stdio.h> + +#include "debug.h" +#include "plugin.h" +#include "widget.h" +#include "widget_gpo.h" + +#include "drv_generic_gpio.h" + +#ifdef WITH_DMALLOC +#include <dmalloc.h> +#endif + +#define MAX_GPOS 32 + + +static char *Section = NULL; +static char *Driver = NULL; + +static int GPO[MAX_GPOS]; + +int GPOS = 0; +int GPIS = 0; + + +int drv_generic_gpio_init(const char *section, const char *driver) +{ + WIDGET_CLASS wc; + + Section = (char *) section; + Driver = (char *) driver; + + if (GPIS <= 0 && GPOS <= 0) { + error("%s: Huh? gpio_init(GPIS=%d, GPOS=%d)", Driver, GPIS, GPOS); + } + + /* reset all GPO's */ + drv_generic_gpio_clear(); + + /* register gpo widget */ + wc = Widget_GPO; + wc.draw = drv_generic_gpio_draw; + widget_register(&wc); + + + /* register plugins */ + /* Fixme */ + + return 0; +} + + +int drv_generic_gpio_clear(void) +{ + int i; + + /* init GPO bufferr */ + for (i = 0; i < MAX_GPOS; i++) { + GPO[i] = 0; + } + + /* really clear GPO's */ + for (i = 0; i < GPOS; i++) { + drv_generic_gpio_real_set(i, 0); + } + + return 0; +} + + +int drv_generic_gpio_draw(WIDGET * W) +{ + WIDGET_GPO *gpo = W->data; + int num = gpo->num; + int val = gpo->val; + + if (num < 0 || num >= GPOS) { + error("%s: gpio_draw(%d): GPO out of range (0..%d)", Driver, num + 1, GPOS); + return -1; + } + + if (GPO[num] != val) { + drv_generic_gpio_real_set(num, val); + GPO[num] = val; + } + + return 0; +} + + +int drv_generic_gpio_quit(void) +{ + return 0; +} |