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Make HAL & US tickers idle safe #4808

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Merged
merged 1 commit into from
Aug 14, 2017
Merged

Make HAL & US tickers idle safe #4808

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14 changes: 13 additions & 1 deletion targets/TARGET_STM/sleep.c
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Original file line number Diff line number Diff line change
Expand Up @@ -34,23 +34,32 @@
#include "sleep_api.h"
#include "rtc_api_hal.h"
#include "hal_tick.h"
#include "mbed_critical.h"

extern void HAL_SuspendTick(void);
extern void HAL_ResumeTick(void);

void hal_sleep(void)
{
// Disable IRQs
core_util_critical_section_enter();

// Stop HAL tick to avoid to exit sleep in 1ms
HAL_SuspendTick();
// Request to enter SLEEP mode
HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);

// Restart HAL tick
HAL_ResumeTick();

// Enable IRQs
core_util_critical_section_exit();
}

void hal_deepsleep(void)
{
// Disable IRQs
core_util_critical_section_enter();

// Stop HAL tick
HAL_SuspendTick();
uint32_t EnterTimeUS = us_ticker_read();
Expand Down Expand Up @@ -82,6 +91,9 @@ void hal_deepsleep(void)
// Restart HAL tick
HAL_ResumeTick();

// Enable IRQs
core_util_critical_section_exit();

// After wake-up from STOP reconfigure the PLL
SetSysClock();

Expand Down