New Platform: TI CC2538 Development Kit

This commit adds cpu, platform and example files,
providing support for running Contiki on TI's cc2538 DK

cpu/cc2538/dev/sys-ctrl.c

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * \addtogroup cc2538-sys-ctrl
+ * @{
+ *
+ * \file
+ * Implementation of the cc2538 System Control driver
+ */
+#include "reg.h"
+#include "cpu.h"
+#include "dev/sys-ctrl.h"
+
+#include <stdint.h>
+/*---------------------------------------------------------------------------*/
+void
+sys_ctrl_init()
+{
+  uint32_t val;
+
+  /*
+   * Desired Clock Ctrl configuration:
+   * 32KHz source: RC
+   * System Clock: 32 MHz
+   * Power Down Unused
+   * I/O Div: 16MHz
+   * Sys Div: 16MHz
+   * Rest: Don't care
+   */
+
+  val = SYS_CTRL_CLOCK_CTRL_OSC32K | SYS_CTRL_CLOCK_CTRL_OSC_PD
+      | SYS_CTRL_CLOCK_CTRL_IO_DIV_16MHZ | SYS_CTRL_CLOCK_CTRL_SYS_DIV_16MHZ;
+  REG(SYS_CTRL_CLOCK_CTRL) = val;
+
+  while((REG(SYS_CTRL_CLOCK_STA) & SYS_CTRL_CLOCK_STA_OSC) != 0);
+}
+/*---------------------------------------------------------------------------*/
+void
+sys_ctrl_reset()
+{
+  REG(SYS_CTRL_PWRDBG) = SYS_CTRL_PWRDBG_FORCE_WARM_RESET;
+}
+
+/**
+ * @}
+ * @}
+ */