1 files changed, 64 insertions, 0 deletions

diff --git a/firmware/drivers/tsc200x.c b/firmware/drivers/tsc200x.c
new file mode 100644
index 0000000000..4af8118d26
--- /dev/null
+++ b/firmware/drivers/tsc200x.c
@@ -0,0 +1,64 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2009 by Jonas Aaberg, Rob Purchase
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "tsc200x.h"
+#include "cpu.h"
+#include "i2c.h"
+
+#define TSC_SLAVE_ADDR 0x90
+#define TSC_REG_READ_X 0x80
+#define TSC_REG_READ_Y 0x90
+
+#ifdef COWON_D2
+#define TSCPRES_GPIO     GPIOC
+#define TSCPRES_GPIO_DIR GPIOC_DIR
+#define TSCPRES_BIT      (1<<26)
+#endif
+
+void tsc200x_init(void)
+{
+    /* Configure GPIOC 26 (TSC pressed) for input */
+    TSCPRES_GPIO_DIR &= ~TSCPRES_BIT;
+}
+
+bool tsc200x_is_pressed(void)
+{
+    return !(TSCPRES_GPIO & TSCPRES_BIT);
+}
+
+bool tsc200x_read_coords(short* x, short* y)
+{
+    int rc = 0;
+    unsigned char x_val[2], y_val[2];
+    
+    rc |= i2c_readmem(TSC_SLAVE_ADDR, TSC_REG_READ_Y, y_val, 2);
+    rc |= i2c_readmem(TSC_SLAVE_ADDR, TSC_REG_READ_X, x_val, 2);
+
+    if (rc >= 0)
+    {
+        /* Keep the 10 most significant bits */
+        *x = ((((short)x_val[0]) << 8) | x_val[1]) >> 6;
+        *y = ((((short)y_val[0]) << 8) | y_val[1]) >> 6;
+        return true;
+    }
+
+    return false;
+}