Diff: targets/TARGET_NUVOTON/TARGET_M480/sleep.c

Revision:

172:7d866c31b3c5

Child:

176:447f873cad2f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NUVOTON/TARGET_M480/sleep.c	Thu Aug 31 17:27:04 2017 +0100
@@ -0,0 +1,98 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2015-2016 Nuvoton
+ *
+ * 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"
+#include "serial_api.h"
+#include "lp_ticker_api.h"
+
+#if DEVICE_SLEEP
+
+#include "cmsis.h"
+#include "device.h"
+#include "objects.h"
+#include "PeripheralPins.h"
+
+static void mbed_enter_sleep(struct sleep_s *obj);
+static void mbed_exit_sleep(struct sleep_s *obj);
+
+int serial_allow_powerdown(void);
+int spi_allow_powerdown(void);
+int i2c_allow_powerdown(void);
+int pwmout_allow_powerdown(void);
+
+/**
+ * Enter Idle mode.
+ */
+void hal_sleep(void)
+{
+    struct sleep_s sleep_obj;
+    sleep_obj.powerdown = 0;
+    mbed_enter_sleep(&sleep_obj);
+    mbed_exit_sleep(&sleep_obj);
+}
+
+/**
+ * Enter Power-down mode while no peripheral is active; otherwise, enter Idle mode.
+ */
+void hal_deepsleep(void)
+{
+    struct sleep_s sleep_obj;
+    sleep_obj.powerdown = 1;
+    mbed_enter_sleep(&sleep_obj);
+    mbed_exit_sleep(&sleep_obj);
+}
+
+static void mbed_enter_sleep(struct sleep_s *obj)
+{
+    // Check if serial allows entering power-down mode
+    if (obj->powerdown) {
+        obj->powerdown = serial_allow_powerdown();
+    }
+    // Check if spi allows entering power-down mode
+    if (obj->powerdown) {
+        obj->powerdown = spi_allow_powerdown();
+    }
+    // Check if i2c allows entering power-down mode
+    if (obj->powerdown) {
+        obj->powerdown = i2c_allow_powerdown();
+    }
+    // Check if pwmout allows entering power-down mode
+    if (obj->powerdown) {
+        obj->powerdown = pwmout_allow_powerdown();
+    }
+    // TODO: Check if other peripherals allow entering power-down mode
+
+    if (obj->powerdown) {   // Power-down mode (HIRC/HXT disabled, LIRC/LXT enabled)
+        SYS_UnlockReg();
+        CLK_PowerDown();
+        SYS_LockReg();
+    } else { // CPU halt mode (HIRC/HXT enabled, LIRC/LXT enabled)
+        SYS_UnlockReg();
+        CLK_Idle();
+        SYS_LockReg();
+    }
+    __NOP();
+    __NOP();
+    __NOP();
+    __NOP();
+}
+
+static void mbed_exit_sleep(struct sleep_s *obj)
+{
+    (void)obj;
+}
+
+#endif