Import Mbed OS hard-float snapshot

targets/TARGET_NXP/TARGET_LPC11U6X/rtc_api.c

@@ -0,0 +1,64 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 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.
+ */
+#include "rtc_api.h"
+
+#if DEVICE_RTC
+
+void rtc_init(void)
+{
+    // Enables clock for RTC
+    LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 30);
+
+    // Software reset
+    LPC_RTC->CTRL |= 1;
+
+    LPC_RTC->COUNT = 0;
+
+    // Enabled RTC
+    LPC_RTC->CTRL |= (1 << 7);
+    // clear reset
+    LPC_RTC->CTRL &= ~1;
+}
+
+void rtc_free(void)
+{
+    LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 30);
+    LPC_RTC->CTRL &= ~(1 << 7);
+}
+
+int rtc_isenabled(void)
+{
+    return (((LPC_RTC->CTRL) & 0x80) != 0);
+}
+
+time_t rtc_read(void)
+{
+    return (time_t)LPC_RTC->COUNT;
+}
+
+void rtc_write(time_t t)
+{
+    // Disabled RTC
+    LPC_RTC->CTRL &= ~(1 << 7);
+
+    // Set count
+    LPC_RTC->COUNT = t;
+
+    //Enabled RTC
+    LPC_RTC->CTRL |= (1 << 7);
+}
+
+#endif