fix nrf51822 i2c & spi conflict

Dependencies:   BLE_API eMPL_MPU6050 nRF51822

Fork of Seeed_Tiny_BLE_Flash by Darren Huang

Revision:
5:b8c02645e6af
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-src/api/LowPowerTicker.h	Tue Nov 17 07:48:56 2015 +0000
@@ -0,0 +1,44 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2015 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_LOWPOWERTICKER_H
+#define MBED_LOWPOWERTICKER_H
+
+#include "platform.h"
+#include "Ticker.h"
+
+#if DEVICE_LOWPOWERTIMER
+
+#include "lp_ticker_api.h"
+
+namespace mbed {
+
+/** Low Power Ticker
+ */
+class LowPowerTicker : public Ticker {
+
+public:
+    LowPowerTicker() : Ticker(get_lp_ticker_data()) {
+    }
+
+    virtual ~LowPowerTicker() {
+    }
+};
+
+} // namespace mbed
+
+#endif
+
+#endif