start of the tsc2100 driver.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14816 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 64 insertions, 0 deletions

diff --git a/firmware/drivers/tsc2100.c b/firmware/drivers/tsc2100.c
new file mode 100644
index 0000000..19da33e
--- /dev/null
+++ b/firmware/drivers/tsc2100.c
@@ -0,0 +1,64 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2007 by Jonathan Gordon
+ *
+ * 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 "system.h"
+#include "spi.h"
+#include "tsc2100.h"
+
+/* Read X, Y, Z1, Z2 touchscreen coordinates. */
+void tsc2100_read_values(short *x, short* y, short *z1, short *z2)
+{
+    int page = 0, address = 0;
+    unsigned short command = 0x8000|(page << 11)|(address << 5);
+    unsigned char out[] = {command >> 8, command & 0xff};
+    unsigned char in[8];
+    spi_block_transfer(out, sizeof(out), in, sizeof(in));
+
+    *x = (in[0]<<8)|in[1];
+    *y = (in[2]<<8)|in[3];
+    *z1 = (in[4]<<8)|in[5];
+    *z2 = (in[6]<<8)|in[7];
+}
+
+short tsc2100_readreg(int page, int address)
+{
+    unsigned short command = 0x8000|(page << 11)|(address << 5);
+    unsigned char out[] = {command >> 8, command & 0xff};
+    unsigned char in[2];
+    spi_block_transfer(out, sizeof(out), in, sizeof(in));
+    return (in[0]<<8)|in[1];
+}
+
+
+void tsc2100_writereg(int page, int address, short value)
+{
+    unsigned short command = 0x8000|(page << 11)|(address << 5);
+    unsigned char out[4] = {command >> 8, command & 0xff,
+                            value >> 8,   value & 0xff};
+    spi_block_transfer(out, sizeof(out), NULL, 0);
+}
+
+void tsc2100_keyclick(void)
+{
+    // 1100 0100 0001 0000
+    short val = 0xC410;
+    tsc2100_writereg(TSAC2_PAGE, TSAC2_ADDRESS, val);
+}