mirror of https://github.com/ARMmbed/mbed-os.git
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* mbed Microcontroller Library
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* (C)Copyright TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION 2017 All rights reserved
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "sleep_api.h"
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// number of warm-up cycle = warm-up time to set / input frequency cycle (s)
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// number of 3*10^-6 (s) / (1/12 (MHz)) = 60000 = 0xea60
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#define CG_WUODR_INT ((uint16_t)0xea60)
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void external_losc_enable(void);
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void hal_sleep(void)
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{
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// Set low power consumption mode IDLE
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CG_SetSTBYMode(CG_STBY_MODE_IDLE);
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// Enter idle mode
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__WFI();
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}
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void hal_deepsleep(void)
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{
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// Set low power consumption mode STOP1
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CG_SetSTBYMode(CG_STBY_MODE_STOP1);
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// Setup warm up time
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CG_SetWarmUpTime(CG_WARM_UP_SRC_OSC_EXT_HIGH, CG_WUODR_INT);
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// Enter stop1 mode
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__WFI();
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// Switch over from IHOSC to EHOSC
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external_losc_enable();
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}
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void external_losc_enable(void)
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{
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// Enable high-speed oscillator
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CG_SetFoscSrc(CG_FOSC_OSC_EXT);
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// Select internal(fIHOSC) as warm-up clock
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CG_SetWarmUpTime(CG_WARM_UP_SRC_OSC_INT_HIGH, CG_WUODR_INT);
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// Start warm-up
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CG_StartWarmUp();
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// Wait until EHOSC become stable
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while (CG_GetWarmUpState() != DONE) {
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// Do nothing
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}
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// Set fosc source
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CG_SetFoscSrc(CG_FOSC_OSC_EXT);
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// Wait for <OSCSEL> to become "1"
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while (CG_GetFoscSrc() != CG_FOSC_OSC_EXT) {
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// Do nothing
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}
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// Stop IHOSC
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CG_SetFoscSrc(CG_FOSC_OSC_INT);
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}
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