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authorreinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2005-12-18 16:18:36 +0000
committerreinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2005-12-18 16:18:36 +0000
commit0a40256cd918d386d0a7b9955322cf9aa0f9da8b (patch)
tree819babba1e548bbcd9fffef6875593e7ade8b57b /drv_generic_gpio.c
parent59524120cfc433dbf1095cf095d8035d21e69784 (diff)
downloadlcd4linux-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.c159
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;
+}