1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 #include "sleep_api.h"
18 #include "fsl_mcg_hal.h"
19 #include "fsl_smc_hal.h"
22 smc_power_mode_protection_config_t sleep_config = {true};
23 SMC_HAL_SetProtection(SMC_BASE, &sleep_config);
25 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
29 void deepsleep(void) {
30 mcg_clock_select_t mcg_clock = CLOCK_HAL_GetClkSrcMode(MCG_BASE);
32 smc_power_mode_protection_config_t sleep_config = {true};
33 SMC_HAL_SetProtection(SMC_BASE, &sleep_config);
34 SMC->PMCTRL = SMC_PMCTRL_STOPM(2);
36 //Deep sleep for ARM core:
37 SCB->SCR = 1 << SCB_SCR_SLEEPDEEP_Pos;
41 //Switch back to PLL as clock source if needed
42 //The interrupt that woke up the device will run at reduced speed
43 if (mcg_clock == kMcgClkSelOut) {
44 if (CLOCK_HAL_GetPllStatMode(MCG_BASE) == kMcgPllStatPllClkSel) {
45 while (CLOCK_HAL_GetLock0Mode(MCG_BASE) == kMcgLockUnlocked);
47 CLOCK_HAL_SetClkSrcMode(MCG_BASE, kMcgClkSelOut);