Moved driver to 'drivers' subdir

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@189 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 197 insertions, 0 deletions

diff --git a/firmware/drivers/button.c b/firmware/drivers/button.c
new file mode 100644
index 0000000..a1abccd
--- /dev/null
+++ b/firmware/drivers/button.c
@@ -0,0 +1,197 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Daniel Stenberg
+ *
+ * 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.
+ *
+ ****************************************************************************/
+/*
+ * Archos Jukebox Recorder button functions
+ */
+
+#include "config.h"
+#include "sh7034.h"
+#include "button.h"
+
+#ifdef HAVE_RECORDER_KEYPAD
+
+/* AJBR buttons are connected to the CPU as follows:
+ *
+ * ON and OFF are connected to separate port B input pins.
+ *
+ * F1, F2, F3, and UP are connected to the AN4 analog input, each through
+ * a separate voltage divider.  The voltage on AN4 depends on which button
+ * (or none, or a combination) is pressed.
+ *
+ * DOWN, PLAY, LEFT, and RIGHT are likewise connected to AN5. */
+ 
+/* Button voltage levels on AN4 and AN5 */
+#define	LEVEL1		50
+#define	LEVEL2		125
+#define	LEVEL3		175
+#define	LEVEL4		225
+
+/* Number of calls to get_button for a button to stop bouncing
+ * and to be considered held down.
+ * Should really use a hardware timer for this.
+ */
+#define BOUNCE_COUNT	200
+#define HOLD_COUNT		10000
+
+static int last;	/* Last button pressed */
+static int count;	/* Number of calls button has been down */
+
+
+/*
+ *Initialize buttons
+ */
+void button_init()
+{
+#ifndef SIMULATOR
+    /* Set PB4 and PB8 as input pins */
+    PBCR1 &= 0xfffc; /* PB8MD = 00 */
+    PBCR2 &= 0xfcff; /* PB4MD = 00 */
+    PBIOR &= ~(PBDR_BTN_ON|PBDR_BTN_OFF); /* Inputs */
+  
+    /* Set A/D to scan AN4 and AN5.
+     * This needs to be changed to scan other analog pins
+     * for battery level, etc. */
+    ADCSR = 0;
+    ADCR  = 0;
+    ADCSR = ADCSR_ADST | ADCSR_SCAN | 0x5;
+#endif
+    last = BUTTON_NONE;
+    count = 0;
+}
+
+/*
+ * Get button pressed from hardware
+ */
+static int get_raw_button (void)
+{
+    /* Check port B pins for ON and OFF */
+    int data = PBDR;
+    if ((data & PBDR_BTN_ON) == 0)
+        return BUTTON_ON;
+    else if ((data & PBDR_BTN_OFF) == 0)
+        return BUTTON_OFF;
+
+    /* Check AN4 pin for F1-3 and UP */
+    data = ADDRAH;
+    if (data >= LEVEL4)
+        return BUTTON_F3;
+    else if (data >= LEVEL3)
+        return BUTTON_UP;
+    else if (data >= LEVEL2)
+        return BUTTON_F2;
+    else if (data >= LEVEL1)
+        return BUTTON_F1;
+
+    /* Check AN5 pin for DOWN, PLAY, LEFT, RIGHT */
+    data = ADDRBH;
+    if (data >= LEVEL4)
+        return BUTTON_DOWN;
+    else if (data >= LEVEL3)
+        return BUTTON_PLAY;
+    else if (data >= LEVEL2)
+        return BUTTON_LEFT;
+    else if (data >= LEVEL1)
+        return BUTTON_RIGHT;
+  
+    return BUTTON_NONE;
+}
+
+/*
+ * Get the currently pressed button.
+ * Returns one of BUTTON_xxx codes, with possibly a modifier bit set.
+ * No modifier bits are set when the button is first pressed.
+ * BUTTON_HELD bit is while the button is being held.
+ * BUTTON_REL bit is set when button has been released.
+ */
+int button_get(void)
+{
+    int btn = get_raw_button();
+    int ret;
+
+    /* Last button pressed is still down */
+    if (btn != BUTTON_NONE && btn == last) {
+        count++;
+        if (count == BOUNCE_COUNT)
+            return btn;
+        else if (count >= HOLD_COUNT)
+            return btn | BUTTON_HELD;
+        else
+            return BUTTON_NONE;
+    }
+
+    /* Last button pressed now released */
+    if (btn == BUTTON_NONE && last != BUTTON_NONE)
+        ret = last | BUTTON_REL;
+    else
+        ret = BUTTON_NONE;
+    
+    last = btn;
+    count = 0;
+    return ret;
+}
+
+#elif HAVE_PLAYER_KEYPAD
+
+/* The player has all buttons on port pins:
+
+   LEFT:  PC0
+   RIGHT: PC2
+   PLAY:  PC3
+   STOP:  PA11
+   ON:    PA5
+   MENU:  PC1
+*/
+
+void button_init(void)
+{
+    /* set port pins as input */
+    PAIOR &= ~0x820;
+}
+
+int button_get(void)
+{
+    int porta = PADR;
+    int portc = PCDR;
+    int btn = 0;
+    
+    if ( portc & 1 )
+        btn |= BUTTON_LEFT;
+    if ( portc & 2 )
+        btn |= BUTTON_MENU;
+    if ( portc & 4 )
+        btn |= BUTTON_RIGHT;
+    if ( portc & 8 )
+        btn |= BUTTON_PLAY | BUTTON_UP;
+    if ( porta & 0x20 )
+        btn |= BUTTON_ON;
+    if ( porta & 0x800 )
+        btn |= BUTTON_STOP | BUTTON_DOWN;
+
+    return btn;
+}
+
+#endif
+
+
+
+/* -----------------------------------------------------------------
+ * local variables:
+ * eval: (load-file "rockbox-mode.el")
+ * end:
+ */