From f57473f6a80c5776474fe300bb599f7f86389507 Mon Sep 17 00:00:00 2001
From: reinelt <>
Date: Sun, 18 Dec 2005 16:18:36 +0000
Subject: [lcd4linux @ 2005-12-18 16:18:34 by reinelt] GPO's added again

---
 drv_generic_gpio.c | 159 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 drv_generic_gpio.c

(limited to 'drv_generic_gpio.c')

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;
+}
-- 
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