1 files changed, 97 insertions, 0 deletions

diff --git a/firmware/target/arm/tcc77x/m200/button-m200.c b/firmware/target/arm/tcc77x/m200/button-m200.c
new file mode 100644
index 0000000000..fec745ae99
--- /dev/null
+++ b/firmware/target/arm/tcc77x/m200/button-m200.c
@@ -0,0 +1,97 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Dave Chapman
+ *
+ * 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 "cpu.h"
+#include "button.h"
+#include "adc.h"
+
+/* 
+
+Results of button testing (viewing ADC values whilst pressing buttons):
+
+HOLD:  GPIOB & 0x0200 (0=hold active, 0x0200 = hold inactive)
+
+ADC[1]: (approx values)
+
+Idle        - 0x3ff
+MENU        - unknown
+
+REPEAT/AB   - 0x03?
+LEFT        - 0x07?-0x08?
+SELECT      - 0x0c?
+RIGHT       - 0x11?
+
+PLAY/PAUSE  - 0x17?-0x018?
+VOL UP      - 0x1e?-0x01f?
+VOL DOWN    - 0x26?
+
+*/
+
+void button_init_device(void)
+{
+    /* Nothing to do */
+}
+
+int button_read_device(void)
+{
+    int btn = BUTTON_NONE;
+    int adc;
+ 
+    /* TODO - determine how to detect BUTTON_MENU - it doesn't appear to 
+              be connected to a GPIO or to an ADC 
+     */
+
+    adc = adc_read(ADC_BUTTONS);
+
+    if (adc < 0x384) {
+        if (adc < 0x140) {
+            if (adc < 0x96) {
+                if (adc < 0x50) {
+                    btn |= BUTTON_REPEATAB;   /* 0x00..0x4f */
+                } else {
+                    btn |= BUTTON_LEFT;       /* 0x50..0x95 */
+                }
+            } else {
+                if (adc < 0xe0) {
+                    btn |= BUTTON_SELECT;     /* 0x96..0xdf */
+                } else {
+                    btn |= BUTTON_RIGHT;      /* 0xe0..0x13f */
+                }
+            }
+        } else {
+            if (adc < 0x208) {
+                if (adc < 0x1b0) {
+                    btn |= BUTTON_PLAYPAUSE;  /* 0x140..0x1af */
+                } else {
+                    btn |= BUTTON_VOLUP;      /* 0x1b0..0x207 */
+                }
+            } else {
+                btn |= BUTTON_VOLDOWN;        /* 0x209..0x383 */
+            }
+        }
+    }
+
+    return btn;
+}
+
+bool button_hold(void)
+{
+    return (GPIOB & 0x200)?false:true;
+}