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targets/TARGET_NUVOTON/TARGET_NUC472/sleep.c
- Committer:
- amithy
- Date:
- 2017-11-09
- Revision:
- 178:c26431f84b0d
- Parent:
- 159:612c381a210f
- Child:
- 160:d5399cc887bb
File content as of revision 178:c26431f84b0d:
/* 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 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); } 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) // NOTE: NUC472's CLK_Idle() will also disable HIRC/HXT. SYS_UnlockReg(); SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; CLK->PWRCTL &= ~CLK_PWRCTL_PDEN_Msk; __WFI(); SYS_LockReg(); } __NOP(); __NOP(); __NOP(); __NOP(); } static void mbed_exit_sleep(struct sleep_s *obj) { // TODO: TO BE CONTINUED (void)obj; } #endif