Import Mbed OS hard-float snapshot

targets/TARGET_NUVOTON/TARGET_M261/sleep.c

@@ -0,0 +1,58 @@
+/* 
+ * Copyright (c) 2019-2020 Nuvoton Technology Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 "sleep_api.h"
+
+#if DEVICE_SLEEP
+
+#include "cmsis.h"
+#include "device.h"
+#include "objects.h"
+#include "PeripheralPins.h"
+#include <stdbool.h>
+
+#if DEVICE_SERIAL
+bool serial_can_deep_sleep(void);
+#endif
+
+/**
+ * Enter idle mode, in which just CPU is halted.
+ */
+void hal_sleep(void)
+{
+    SYS_UnlockReg();
+    CLK_Idle();
+    SYS_LockReg();
+}
+
+/**
+ * Enter power-down mode, in which HXT/HIRC are halted.
+ */
+void hal_deepsleep(void)
+{
+#if DEVICE_SERIAL
+    if (!serial_can_deep_sleep()) {
+        return;
+    }
+#endif
+
+    SYS_UnlockReg();
+    CLK_PowerDown();
+    SYS_LockReg();
+}
+
+#endif