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feat(C0): Add C0 LowPower support #88

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Merged
merged 1 commit into from
Jan 23, 2023
Merged

feat(C0): Add C0 LowPower support #88

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5 changes: 5 additions & 0 deletions src/STM32LowPower.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -82,7 +82,12 @@ void STM32LowPower::sleep(uint32_t ms)
if ((ms != 0) || _rtc_wakeup) {
programRtcWakeUp(ms, SLEEP_MODE);
}
#if defined(PWR_LOWPOWERREGULATOR_ON)
LowPower_sleep(PWR_LOWPOWERREGULATOR_ON);
#else
LowPower_sleep(PWR_MAINREGULATOR_ON);
#endif

}

/**
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13 changes: 11 additions & 2 deletions src/low_power.c
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Original file line number Diff line number Diff line change
Expand Up @@ -60,8 +60,11 @@ void LowPower_init()
/* Enable Power Clock */
__HAL_RCC_PWR_CLK_ENABLE();
#endif

#if defined(PWR_CR_DBP) || defined(PWR_CR1_DBP) || defined(PWR_DBPR_DBP)
/* Allow access to Backup domain */
HAL_PWR_EnableBkUpAccess();
#endif

#ifdef __HAL_RCC_WAKEUPSTOP_CLK_CONFIG
/* Ensure that HSI is wake-up system clock */
Expand Down Expand Up @@ -385,7 +388,8 @@ void SystemClock_Decrease(void)
void LowPower_sleep(uint32_t regulator)
{

#if defined(PWR_CSR_REGLPF) || defined(PWR_SR2_REGLPF)
#if defined(PWR_LOWPOWERREGULATOR_ON) && \
(defined(PWR_CSR_REGLPF) || defined(PWR_SR2_REGLPF))
// When LowPower regulator sleep mode is used, it is necessary to decrease CPU Frequency
if (regulator == PWR_LOWPOWERREGULATOR_ON) {
SystemClock_Decrease();
Expand All @@ -402,7 +406,8 @@ void LowPower_sleep(uint32_t regulator)
/* Enter Sleep Mode , wake up is done once User push-button is pressed */
HAL_PWR_EnterSLEEPMode(regulator, PWR_SLEEPENTRY_WFI);

#if defined(PWR_CSR_REGLPF) || defined(PWR_SR2_REGLPF)
#if defined(PWR_LOWPOWERREGULATOR_ON) && \
(defined(PWR_CSR_REGLPF) || defined(PWR_SR2_REGLPF))
// In case of LowPower Regulator used for sleep, restore Main regulator on exit
if (regulator == PWR_LOWPOWERREGULATOR_ON) {
#if defined(__HAL_RCC_PWR_CLK_ENABLE)
Expand Down Expand Up @@ -492,7 +497,11 @@ void LowPower_stop(serial_t *obj)
} else
#endif
{
#if defined(PWR_LOWPOWERREGULATOR_ON)
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
#else
HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON, PWR_STOPENTRY_WFI);
#endif
}

/* Exit Stop mode reset clocks */
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