diff --git a/platform/mbxxx/clock.c b/platform/mbxxx/clock.c
new file mode 100644
index 000000000..2a01eb8b7
--- /dev/null
+++ b/platform/mbxxx/clock.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2010, STMicroelectronics.
+ * 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. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * This file is part of the Contiki OS
+ *
+ */
+/*---------------------------------------------------------------------------*/
+/**
+* \file
+*			Clock for STM32W.
+* \author
+*			Salvatore Pitrulli <salvopitru@users.sourceforge.net>
+*/
+/*---------------------------------------------------------------------------*/
+
+/*
+ * File customized for mbxxx platform. It uses systick timer to control button
+ * status without interrupts, as well as for system clock.
+ */
+
+#include PLATFORM_HEADER
+#include "hal/error.h"
+#include "hal/hal.h"
+#include "dev/stm32w-systick.h"
+
+#include "sys/clock.h"
+#include "sys/etimer.h"
+#include "dev/button-sensor.h"
+#include "uart1.h"
+#include "dev/leds.h"
+#include "dev/stm32w-radio.h"
+
+#define DEBUG DEBUG_NONE
+#include "net/uip-debug.h"
+
+// The value that will be load in the SysTick value register.
+#define RELOAD_VALUE 24000-1   // 1 ms with a 24 MHz clock
+
+static volatile clock_time_t count;
+static volatile unsigned long current_seconds = 0;
+static unsigned int second_countdown = CLOCK_SECOND;
+
+/*---------------------------------------------------------------------------*/
+void SysTick_Handler(void)
+{
+
+  count++;
+
+  if(button_sensor.status(SENSORS_READY)){
+    button_sensor.value(0); // sensors_changed is called inside this function.
+  }
+
+  if(etimer_pending()) {
+    etimer_request_poll();
+  }
+  
+  if (--second_countdown == 0) {
+    current_seconds++;
+    second_countdown = CLOCK_SECOND;
+  }
+  
+}
+
+/*---------------------------------------------------------------------------*/
+
+void clock_init(void)
+{ 
+  
+  ATOMIC(
+  
+  //Counts the number of ticks.  
+  count = 0;
+  
+  SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
+  SysTick_SetReload(RELOAD_VALUE);
+  SysTick_ITConfig(ENABLE);
+  SysTick_CounterCmd(SysTick_Counter_Enable);
+  
+  )
+}
+
+/*---------------------------------------------------------------------------*/
+
+clock_time_t clock_time(void)
+{
+  return count;
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Delay the CPU for a multiple of TODO
+ */
+void clock_delay(unsigned int i)
+{
+  for (; i > 0; i--) {		/* Needs fixing XXX */
+    unsigned j;
+    for (j = 50; j > 0; j--)
+      asm ("nop");
+  }
+}
+
+/*---------------------------------------------------------------------------*/
+/**
+ * Wait for a multiple of 1 ms.
+ *
+ */
+void clock_wait(clock_time_t i)
+{
+  clock_time_t start;
+
+  start = clock_time();
+  while(clock_time() - start < (clock_time_t)i);
+}
+/*---------------------------------------------------------------------------*/
+
+unsigned long clock_seconds(void)
+{
+  return current_seconds;
+}
+
+void sleep_seconds(int seconds)
+{
+  uint32_t quarter_seconds = seconds * 4;
+  uint8_t radio_on;
+
+
+  halPowerDown();
+  radio_on = stm32w_radio_is_on();
+  stm32w_radio_driver.off();
+
+  halSleepForQsWithOptions(&quarter_seconds, 0);
+
+
+  ATOMIC(
+
+  halPowerUp();
+
+  // Update OS system ticks.
+  current_seconds += seconds - quarter_seconds / 4 ; // Passed seconds
+  count += seconds * CLOCK_SECOND - quarter_seconds * CLOCK_SECOND / 4 ;
+
+  if(etimer_pending()) {
+    etimer_request_poll();
+  }
+
+  SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
+  SysTick_SetReload(RELOAD_VALUE);
+  SysTick_ITConfig(ENABLE);
+  SysTick_CounterCmd(SysTick_Counter_Enable);
+
+  )
+
+  stm32w_radio_driver.init();
+  if(radio_on){
+	  stm32w_radio_driver.on();
+  }
+
+  uart1_init(115200);
+  leds_init();
+  rtimer_init();
+
+  PRINTF("WakeInfo: %04x\r\n", halGetWakeInfo());
+
+
+}