From 0e6dd7efcd21d48665b5a799fe081a75cdcb960f Mon Sep 17 00:00:00 2001
From: Jens Arnold <amiconn@rockbox.org>
Date: Mon, 27 Nov 2006 02:16:32 +0000
Subject: Moved archos button reading to target tree. * Cleanup of button.[ch].
 * Deactivated serial remote code for recorder FM/V2 as there is no remote
 pin, saving ~500 bytes of code.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11612 a1c6a512-1295-4272-9138-f99709370657
---
 .../target/sh/archos/recorder/button-recorder.c    | 108 +++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100755 firmware/target/sh/archos/recorder/button-recorder.c

(limited to 'firmware/target/sh/archos/recorder/button-recorder.c')

diff --git a/firmware/target/sh/archos/recorder/button-recorder.c b/firmware/target/sh/archos/recorder/button-recorder.c
new file mode 100755
index 0000000000..dc43cce0e0
--- /dev/null
+++ b/firmware/target/sh/archos/recorder/button-recorder.c
@@ -0,0 +1,108 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Jens Arnold
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+#include "system.h"
+#include "button.h"
+#include "backlight.h"
+#include "adc.h"
+
+/*
+ Recorder hardware button hookup
+ ===============================
+
+ F1, F2, F3, UP:           connected to AN4 through a resistor network
+ DOWN, PLAY, LEFT, RIGHT:  likewise connected to AN5
+
+ The voltage on AN4/ AN5 depends on which keys (or key combo) is pressed
+
+ ON:     PB8, low active
+ OFF:    PB4, low active
+*/
+
+void button_init_device(void)
+{
+    /* Set PB4 and PB8 as input pins */
+    PBCR1 &= 0xfffc;  /* PB8MD = 00 */
+    PBCR2 &= 0xfcff;  /* PB4MD = 00 */
+    PBIOR &= ~0x0110; /* Inputs */
+}
+
+int button_read_device(void)
+{
+    int btn = BUTTON_NONE;
+    int data;
+    static int off_button_count = 0;
+
+    /* check F1..F3 and UP */
+    data = adc_read(ADC_BUTTON_ROW1);
+    if (data >= 250)
+    {
+        if (data >= 700)
+            if (data >= 900)
+                btn = BUTTON_F3;
+            else
+                btn = BUTTON_UP;
+        else
+            if (data >= 500)
+                btn = BUTTON_F2;
+            else
+                btn = BUTTON_F1;
+    }
+
+    /* Some units have mushy keypads, so pressing UP also activates
+       the Left/Right buttons. Let's combat that by skipping the AN5
+       checks when UP is pressed. */
+    if(!(btn & BUTTON_UP))
+    {
+        /* check DOWN, PLAY, LEFT, RIGHT */
+        data = adc_read(ADC_BUTTON_ROW2);
+        if (data >= 250)
+        {
+            if (data >= 700)
+                if (data >= 900)
+                    btn |= BUTTON_DOWN;
+                else
+                    btn |= BUTTON_PLAY;
+            else
+                if (data >= 500)
+                    btn |= BUTTON_LEFT;
+                else
+                    btn |= BUTTON_RIGHT;
+        }
+    }
+
+    /* check port B pins for ON and OFF */
+    data = PBDR;
+    if ((data & 0x0100) == 0)
+        btn |= BUTTON_ON;
+
+    if ((data & 0x0010) == 0)
+    {
+        /* When the batteries are low, the low-battery shutdown logic causes
+         * spurious OFF events due to voltage fluctuation on some units.
+         * Only accept OFF when read several times in sequence. */
+        if (++off_button_count > 3)
+            btn |= BUTTON_OFF;
+    }
+    else
+        off_button_count = 0;
+        
+    return btn;
+}
-- 
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