attachInterruptWakeup() add parameter to define LowPowerMode

Up to now, when configuring pin for wakeup,
if pin has system wakeup capability (able to wakeup from Shutdown),
this capabilty is enable (even if we only want to go in idle, sleep or depsleep).
It has the inconvenient to enable automaticvally pull down on the pin,
on some sTM32 families like L0.

Aim of this patch is to be able to configure pins to wakeup from
 idle, sleep or deepsleep, but without activating System wakeup capability.
It means it will not be able to wake from Shutdown.
And thus there is no pull down activated.

For backward compatibility, default LowPowerMode is SHUTDOWN_MODE

Fixes #19

Author: ABOSTM

keywords.txt

@@ -21,6 +21,11 @@ shutdown	KEYWORD2
 attachInterruptWakeup	KEYWORD2
 enableWakeupFrom	KEYWORD2
 
+IDLE_MODE	LITERAL1
+SLEEP_MODE	LITERAL1
+DEEP_SLEEP_MODE	LITERAL1
+SHUTDOWN_MODE	LITERAL1
+
 #######################################
 # Constants (LITERAL1)
 #######################################

src/STM32LowPower.cpp

@@ -123,13 +123,15 @@ void STM32LowPower::shutdown(uint32_t millis)
   * @param  mode: pin interrupt mode (HIGH, LOW, RISING, FALLING or CHANGE)
   * @retval None
   */
-void STM32LowPower::attachInterruptWakeup(uint32_t pin, voidFuncPtrVoid callback, uint32_t mode)
+void STM32LowPower::attachInterruptWakeup(uint32_t pin, voidFuncPtrVoid callback, uint32_t mode, LP_Mode LowPowerMode)
 {
   // All GPIO for idle (smt32 sleep) and sleep (stm32 stop)
   attachInterrupt(pin, callback, mode);
 
-  // If Gpio is a Wake up pin activate it for deepSleep (standby stm32) and shutdown
-  LowPower_EnableWakeUpPin(pin, mode);
+  if (LowPowerMode == SHUTDOWN_MODE) {
+    // If Gpio is a Wake up pin activate it for deepSleep (standby stm32) and shutdown
+    LowPower_EnableWakeUpPin(pin, mode);
+  }
 }
 
 /**

src/STM32LowPower.h

@@ -49,6 +49,13 @@
 #include "STM32RTC.h"
 #include "Wire.h"
 
+enum LP_Mode : uint8_t {
+  IDLE_MODE,
+  SLEEP_MODE,
+  DEEP_SLEEP_MODE,
+  SHUTDOWN_MODE
+};
+
 typedef void (*voidFuncPtrVoid)( void ) ;
 
 class STM32LowPower {
@@ -77,20 +84,12 @@ class STM32LowPower {
     shutdown((uint32_t)millis);
   }
 
-  void attachInterruptWakeup(uint32_t pin, voidFuncPtrVoid callback, uint32_t mode);
+  void attachInterruptWakeup(uint32_t pin, voidFuncPtrVoid callback, uint32_t mode, LP_Mode LowPowerMode = SHUTDOWN_MODE);
 
   void enableWakeupFrom(HardwareSerial *serial, voidFuncPtrVoid callback);
   void enableWakeupFrom(STM32RTC *rtc, voidFuncPtr callback, void *data = NULL);
 
 private:
-  enum LP_Mode: uint8_t
-  {
-    IDLE_MODE,
-    SLEEP_MODE,
-    DEEP_SLEEP_MODE,
-    SHUTDOWN_MODE
-  };
-
   bool _configured;     // Low Power mode initialization status
   serial_t *_serial;    // Serial for wakeup from deep sleep
   bool _rtc_wakeup;     // Is RTC wakeup?