Diff: targets/TARGET_STM/sleep.c

Revision:

160:d5399cc887bb

Parent:

156:95d6b41a828b

--- a/targets/TARGET_STM/sleep.c	Tue Feb 28 17:13:35 2017 +0000
+++ b/targets/TARGET_STM/sleep.c	Tue Mar 14 16:40:56 2017 +0000
@@ -27,52 +27,68 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *******************************************************************************
  */
-#include "sleep_api.h"
-#include "rtc_api_hal.h"
-
 #if DEVICE_SLEEP
 
 #include "cmsis.h"
-
+#include "us_ticker_api.h"
+#include "sleep_api.h"
+#include "rtc_api_hal.h"
+#include "hal_tick.h"
 
-void sleep(void)
+extern void HAL_SuspendTick(void);
+extern void HAL_ResumeTick(void);
+
+void hal_sleep(void)
 {
-    // Stop HAL systick
+    // 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 systick
+
+    // Restart HAL tick
     HAL_ResumeTick();
 }
 
-void deepsleep(void)
+void hal_deepsleep(void)
 {
-    // Stop HAL systick
+    // Stop HAL tick
     HAL_SuspendTick();
+    uint32_t EnterTimeUS = us_ticker_read();
 
     // Request to enter STOP mode with regulator in low power mode
 #if TARGET_STM32L4
-    if (__HAL_RCC_PWR_IS_CLK_ENABLED()) {
-        HAL_PWREx_EnableLowPowerRunMode();
-        HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
+    int pwrClockEnabled = __HAL_RCC_PWR_IS_CLK_ENABLED();
+    int lowPowerModeEnabled = PWR->CR1 & PWR_CR1_LPR;
+    
+    if (!pwrClockEnabled) {
+        __HAL_RCC_PWR_CLK_ENABLE();
+    }
+    if (lowPowerModeEnabled) {
         HAL_PWREx_DisableLowPowerRunMode();
-    } else {
-        __HAL_RCC_PWR_CLK_ENABLE();
+    }
+    
+    HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
+    
+    if (lowPowerModeEnabled) {
         HAL_PWREx_EnableLowPowerRunMode();
-        HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
-        HAL_PWREx_DisableLowPowerRunMode();
+    }
+    if (!pwrClockEnabled) {
         __HAL_RCC_PWR_CLK_DISABLE();
     }
 #else /* TARGET_STM32L4 */
     HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
 #endif /* TARGET_STM32L4 */
 
-    // Restart HAL systick
+    // Restart HAL tick
     HAL_ResumeTick();
 
     // After wake-up from STOP reconfigure the PLL
     SetSysClock();
 
+    TIM_HandleTypeDef TimMasterHandle;
+    TimMasterHandle.Instance = TIM_MST;
+    __HAL_TIM_SET_COUNTER(&TimMasterHandle, EnterTimeUS);
+
 #if DEVICE_LOWPOWERTIMER
     rtc_synchronize();
 #endif