From 295367686ec9855c4d90f68a6003e819fef8e7ab Mon Sep 17 00:00:00 2001
From: Marcoen Hirschberg <marcoen@gmail.com>
Date: Fri, 29 Dec 2006 02:49:12 +0000
Subject: merge a big part of the unofficial gigabeat cvs back. Includes
 working bootloader and rockbox with audio.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11850 a1c6a512-1295-4272-9138-f99709370657
---
 .../target/arm/gigabeat/meg-fx/button-meg-fx.c     | 141 +++++++++++++++------
 1 file changed, 105 insertions(+), 36 deletions(-)

(limited to 'firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c')

diff --git a/firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c
index 88a1b4de09..210febb7db 100644
--- a/firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c
@@ -27,58 +27,127 @@
 #include "adc.h"
 #include "system.h"
 
+static bool headphones_detect;
+
+static int const remote_buttons[] =
+{
+    BUTTON_NONE,    /* Headphones connected - remote disconnected */
+    BUTTON_SELECT,
+    BUTTON_MENU,    /* could be changed to BUTTON_A */
+    BUTTON_LEFT,
+    BUTTON_RIGHT,
+    BUTTON_UP,      /* could be changed to BUTTON_VOL_UP */
+    BUTTON_DOWN,    /* could be changed to BUTTON_VOL_DOWN */
+    BUTTON_NONE,    /* Remote control attached - no buttons pressed */
+    BUTTON_NONE,    /* Nothing in the headphone socket */
+};
+
+
+
+
+
 void button_init_device(void)
 {
     /* Power, Remote Play & Hold switch */
 }
 
-bool button_hold(void)
+
+
+inline bool button_hold(void)
 {
     return (GPGDAT & (1 << 15));
 }
 
-int button_read_device(void)
-{
-    int btn = BUTTON_NONE;
-    int touchpad = GPJDAT;
-    int buttons = GPGDAT;
-
-    /* Check for hold first */
-    if (buttons & (1 << 15))
-        return btn;
 
-    /* the side buttons */
-    if (buttons & (1 << 0))
-        btn |= BUTTON_POWER;
-
-    if (buttons & (1 << 1))
-        btn |= BUTTON_MENU;
-
-    if (buttons & (1 << 2))
-        btn |= BUTTON_VOL_UP;
-
-    if (buttons & (1 << 3))
-        btn |= BUTTON_VOL_DOWN;
-
-    if (buttons & (1 << 4))
-        btn |= BUTTON_A;
 
+int button_read_device(void)
+{
+    int btn;
+    int touchpad;
+    int buttons;
+    static int lastbutton;
+    unsigned short remote_adc;
+
+    /* Check for hold first - exit if asserted with no button pressed */
+    if (button_hold())
+        return BUTTON_NONE;
+
+    /* See header for ADC values when remote control buttons are pressed */
+    /* Only one button can be sensed at a time on the remote. */
+    /* Need to filter the remote button because the ADC is so fast */
+    remote_adc = adc_read(ADC_HPREMOTE);
+    btn = remote_buttons[(remote_adc + 64) / 128];
+    if (btn != lastbutton)
+    {
+        /* if the buttons dont agree twice in a row, then its none */
+        lastbutton = btn;
+        btn = BUTTON_NONE;
+    }
+        
+    /* 
+     * Code can be added that overrides the side buttons when the remote is
+     *  plugged in: Check for remote_adc > 64 && remote_adc < 930 then skip
+     *  reading the side and touch volume buttons, right, left, up, down, etc.
+     *  but keep reading the Power and 'A'.
+     * For now, the buttons from remote and side and touch are used together.
+     */
+
+    
+    /* the side buttons - Check before doing all of the work on each bit */
+    buttons = GPGDAT & 0x1F;
+    if (buttons)
+    {
+        if (buttons & (1 << 0))
+            btn |= BUTTON_POWER;
+
+        if (buttons & (1 << 1))
+            btn |= BUTTON_MENU;
+
+        if (buttons & (1 << 2))
+            btn |= BUTTON_VOL_UP;
+
+        if (buttons & (1 << 3))
+            btn |= BUTTON_VOL_DOWN;
+
+        if (buttons & (1 << 4))
+            btn |= BUTTON_A;
+    }
+    
     /* the touchpad */
-    if (touchpad & (1 << 0))
-        btn |= BUTTON_UP;
+    touchpad = GPJDAT & 0x10C9;
+    if (touchpad)
+    {
+        if (touchpad & (1 << 0))
+            btn |= BUTTON_UP;
 
-    if (touchpad & (1 << 12))
-        btn |= BUTTON_RIGHT;
+        if (touchpad & (1 << 12))
+            btn |= BUTTON_RIGHT;
 
-    if (touchpad & (1 << 6))
-        btn |= BUTTON_DOWN;
+        if (touchpad & (1 << 6))
+            btn |= BUTTON_DOWN;
 
-    if (touchpad & (1 << 7))
-        btn |= BUTTON_LEFT;
-
-    if (touchpad & (1 << 3))
-        btn |= BUTTON_SELECT;
+        if (touchpad & (1 << 7))
+            btn |= BUTTON_LEFT;
 
+        if (touchpad & (1 << 3))
+            btn |= BUTTON_SELECT;
+    }
+    
     return btn;
 }
 
+
+
+bool headphones_inserted(void)
+{
+    unsigned short remote_adc = adc_read(ADC_HPREMOTE);
+    if (remote_adc != ADC_READ_ERROR)
+    {
+        /* If there is nothing in the headphone socket, the ADC reads high */
+        if (remote_adc < 940)
+            headphones_detect = true;
+        else
+            headphones_detect = false;
+    }
+    return headphones_detect;
+}
-- 
cgit v1.2.3