From 28d54c6016459ffe93c0be2efea7de27c38d783c Mon Sep 17 00:00:00 2001
From: Marcin Bukat <marcin.bukat@gmail.com>
Date: Mon, 26 Apr 2010 21:40:16 +0000
Subject: Add MPIO HD200 port - new files

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25725 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/coldfire/mpio/hd200/button-hd200.c | 123 +++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 firmware/target/coldfire/mpio/hd200/button-hd200.c

(limited to 'firmware/target/coldfire/mpio/hd200/button-hd200.c')

diff --git a/firmware/target/coldfire/mpio/hd200/button-hd200.c b/firmware/target/coldfire/mpio/hd200/button-hd200.c
new file mode 100644
index 0000000000..b40c3324e1
--- /dev/null
+++ b/firmware/target/coldfire/mpio/hd200/button-hd200.c
@@ -0,0 +1,123 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id:$
+ *
+ * Copyright (C) 2010 Marcin Bukat
+ *
+ * This program 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
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+#include "cpu.h"
+#include "system.h"
+#include "button.h"
+#include "backlight.h"
+#include "adc.h"
+
+void button_init_device(void)
+{
+    /* Set GPIO36, GPIO56 as general purpose inputs */
+    or_l((1<<4)|(1<<24),&GPIO1_FUNCTION);
+    and_l(~((1<<4)|(1<<24)),&GPIO1_ENABLE);
+}
+
+bool button_hold(void)
+{
+    /* GPIO36 active high */
+    return (GPIO1_READ & (1<<4))?true:false;
+}
+
+
+/*
+ * Get button pressed from hardware
+ */
+int button_read_device(void)
+{
+    int btn = BUTTON_NONE;
+    int data = 0;
+    static bool hold_button = false;
+
+    /* for moving average filter */
+    static unsigned short button_filter[4];
+    static unsigned char index;
+
+    bool hold_button_old;
+
+    /* normal buttons */
+    hold_button_old = hold_button;
+    hold_button = button_hold();
+    
+    
+#ifndef BOOTLOADER
+    if (hold_button != hold_button_old)
+        backlight_hold_changed(hold_button);
+#endif
+
+    if (!hold_button)
+    {
+
+        /* simple moving average filter with 4 item window */
+        button_filter[index&0x03] = adc_scan(ADC_BUTTONS);
+        index++;
+        
+        data = (button_filter[0]+button_filter[1] \
+               +button_filter[2]+button_filter[3])>>2;
+
+
+        if (data < 2250) // valid button
+        {
+	    if (data < 900) /* middle */
+            {
+                if (data < 500)
+                {
+                    if (data > 200)
+                        /* 200 - 500 */
+                        btn = BUTTON_REC;
+                }
+                else /* 900 - 500 */
+                    btn = BUTTON_VOL_DOWN;
+            }
+            else /* 2250 - 900 */
+            {
+                if (data < 1600)
+                {
+                    /* 1600 - 900 */
+                    if (data < 1200)
+                        /* 1200 - 900 */
+                        btn = BUTTON_VOL_UP;
+                    else /* 1600 - 1200 */
+                        btn = BUTTON_NEXT;
+                }
+                else /* 1600 - 2250 */
+                {
+                    if (data < 1900)
+                        /* 1900 - 1600 */
+                        btn = BUTTON_PREV;
+                    else /* 1900 - 2250 */
+                        btn = BUTTON_SELECT;
+                }
+	    }	    
+        }
+    }
+
+
+    data = GPIO1_READ;
+
+    /* GPIO56 active high main PLAY/PAUSE/ON */
+    if (!hold_button && ((data & (1<<24))))
+        btn |= BUTTON_PLAY;
+        
+    return btn;
+}
-- 
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