121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
/*
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* Copyright (C) 2019 Max Regan
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "Bsp/SystemTime.h"
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#include "Bsp/Drivers/LowPower.h"
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#include "Bsp/macros.h"
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#include "Mcu.h"
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uint32_t wakeups = 0;
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namespace BSP {
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using BSP::ReturnCode;
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GpioPin *LowPower::m_timing_pin = nullptr;
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ReturnCode LowPower::init()
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{
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m_timing_pin = nullptr;
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return ReturnCode::OK;
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}
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ReturnCode LowPower::init(GpioPin &timing_pin)
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{
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m_timing_pin = &timing_pin;
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m_timing_pin->write(0);
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return ReturnCode::OK;
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}
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ReturnCode LowPower::enable_debug()
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{
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/* Enable Clocks */
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// FIXME for all boards
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// SET(RCC->APB2ENR, RCC_APB2ENR_DBGEN);
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// SET(RCC->APB2SMENR, RCC_APB2SMENR_DBGSMEN);
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SET(DBGMCU->CR, DBGMCU_CR_DBG_STOP);
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SET(DBGMCU->CR, DBGMCU_CR_DBG_SLEEP);
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SET(DBGMCU->CR, DBGMCU_CR_DBG_STANDBY);
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return ReturnCode::OK;
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}
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ReturnCode LowPower::disable_debug()
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{
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CLR(DBGMCU->CR, DBGMCU_CR_DBG_STOP);
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CLR(DBGMCU->CR, DBGMCU_CR_DBG_SLEEP);
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CLR(DBGMCU->CR, DBGMCU_CR_DBG_STANDBY);
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#if defined(STM32L0XX)
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CLR(RCC->APB2SMENR, RCC_APB2SMENR_DBGSMEN);
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#elif defined(STM32L4XX)
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#else
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#error "Unsupported device type"
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#endif
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return ReturnCode::OK;
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}
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ReturnCode LowPower::sleep()
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{
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// TODO: unimplemented
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return ReturnCode::FAIL;
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}
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ReturnCode LowPower::stop()
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{
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#if defined(STM32L0XX)
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SET(PWR->CR, PWR_CR_CWUF); // clear wakeup flag
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while(PWR->CSR & PWR_CSR_WUF) {};
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// Enter stop mode when the CPU enters deepsleep
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CLR(PWR->CR, PWR_CR_PDDS);
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#elif defined(STM32L4XX)
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SET(PWR->SCR, PWR_SCR_CWUF1); // clear wakeup flag
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while(PWR->SR1 & PWR_SR1_WUF1) {};
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// Enter stop mode 1 when the CPU enters deepsleep
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SET_TO(PWR->CR1, PWR_CR1_LPMS, 1 << PWR_CR1_LPMS_Pos);
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#else
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#error "Unsupported device type"
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#endif
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CLR(RCC->CFGR, RCC_CFGR_STOPWUCK); // MSI oscillator is wake-up from stop clock
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SET(SCB->SCR, SCB_SCR_SLEEPDEEP_Msk); // low-power mode = stop mode
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if (m_timing_pin != nullptr) {
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m_timing_pin->write(1);
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__WFI(); // enter low-power mode (Wake from interrupt)
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m_timing_pin->write(0);
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} else{
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__WFI();
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}
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wakeups++;
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return ReturnCode::OK;
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}
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}
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