1 files changed, 45 insertions, 0 deletions

diff --git a/firmware/target/arm/tcc77x/kernel-tcc77x.c b/firmware/target/arm/tcc77x/kernel-tcc77x.c
new file mode 100644
index 0000000000..17c6ff0734
--- /dev/null
+++ b/firmware/target/arm/tcc77x/kernel-tcc77x.c
@@ -0,0 +1,45 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Copyright (C) 2008 by Rob Purchase
+*
+* 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 "kernel.h"
+#include "timer.h"
+#include "thread.h"
+
+void tick_start(unsigned int interval_in_ms)
+{
+    /* configure Timer T-Clock to 2Mhz (clock source 4 (Xin) divided by 6) */
+    PCLKCFG4 = (1 << 31) | (4 << 28) | (5 << 16);
+
+    /* disable Timer0 */
+    TCFG0 &= ~1;
+
+    /* set counter reference value based on 1Mhz tick */
+    TREF0 = interval_in_ms * 1000;
+
+    /* Timer0 = reset to 0, divide=2, IRQ enable, enable (continuous) */
+    TCFG0 = (1<<8) | (0<<4) | (1<<3) | 1;
+
+    /* Unmask timer IRQ */
+    IEN |= TIMER0_IRQ_MASK;
+}
+
+/* NB: Since we are using a single timer IRQ, tick tasks are dispatched as
+       part of the central timer IRQ processing in timer-tcc77x.c */