Diff: targets/TARGET_NUVOTON/TARGET_M451/sleep.c

Revision:

153:9398a535854b

Parent:

152:9a67f0b066fc

--- a/targets/TARGET_NUVOTON/TARGET_M451/sleep.c	Thu Dec 15 11:48:27 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,118 +0,0 @@
-/* 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"
-
-void us_ticker_prepare_sleep(struct sleep_s *obj);
-void us_ticker_wakeup_from_sleep(struct sleep_s *obj);
-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 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 deepsleep(void)
-{
-    struct sleep_s sleep_obj;
-    sleep_obj.powerdown = 1;
-    mbed_enter_sleep(&sleep_obj);
-    mbed_exit_sleep(&sleep_obj);
-}
-
-
-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
-    
-    obj->start_us = lp_ticker_read();
-    // Let us_ticker prepare for power-down or reject it.
-    us_ticker_prepare_sleep(obj);
-    
-    // NOTE(STALE): To pass mbed-drivers test, timer requires to be fine-grained, so its implementation needs HIRC rather than LIRC/LXT as its clock source.
-    //       But as CLK_PowerDown()/CLK_Idle() is called, HIRC will be disabled and timer cannot keep counting and alarm. To overcome the dilemma, 
-    //       just make CPU halt and compromise power saving.
-    // NOTE: As CLK_PowerDown()/CLK_Idle() is called, HIRC/HXT will be disabled in normal mode, but not in ICE mode. This may cause confusion in development.
-
-    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();
-    
-    obj->end_us = lp_ticker_read();
-    obj->period_us = (obj->end_us > obj->start_us) ? (obj->end_us - obj->start_us) : (uint32_t) ((uint64_t) obj->end_us + 0xFFFFFFFFu - obj->start_us);
-    // Let us_ticker recover from power-down.
-    us_ticker_wakeup_from_sleep(obj);
-}
-
-void mbed_exit_sleep(struct sleep_s *obj)
-{
-    // TODO: TO BE CONTINUED
-    
-    (void)obj;
-}
-
-#endif