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Diffstat (limited to 'firmware/target/sh/archos/recorder/button-recorder.c')
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diff --git a/firmware/target/sh/archos/recorder/button-recorder.c b/firmware/target/sh/archos/recorder/button-recorder.c
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+++ b/firmware/target/sh/archos/recorder/button-recorder.c
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+/***************************************************************************
+ * __________ __ ___.
+ * 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;
+}