Add STEPPER_ISR_ENABLED() to HALs

Some also get a `HAL_timer_interrupt_enabled` function.

Marlin/src/HAL/HAL_AVR/HAL_AVR.h

 
 #define ENABLE_STEPPER_DRIVER_INTERRUPT()  SBI(TIMSK1, OCIE1A)
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() CBI(TIMSK1, OCIE1A)
+#define STEPPER_ISR_ENABLED() TEST(TIMSK1, OCIE1A)
 
 #define ENABLE_TEMPERATURE_INTERRUPT()  SBI(TIMSK0, OCIE0B)
 #define DISABLE_TEMPERATURE_INTERRUPT() CBI(TIMSK0, OCIE0B)

Marlin/src/HAL/HAL_DUE/HAL_timers_Due.cpp

 }
 
 void HAL_timer_enable_interrupt(const uint8_t timer_num) {
-  const tTimerConfig *pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
   pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_IER = TC_IER_CPCS;
 }
 
 void HAL_timer_disable_interrupt(const uint8_t timer_num) {
-  const tTimerConfig *pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
   pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_IDR = TC_IDR_CPCS;
 }
 
+void HAL_timer_interrupt_enabled(const uint8_t timer_num) {
+  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
+  return pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_IER == TC_IER_CPCS;
+}
+
 #if 0
   void HAL_timer_set_count(const uint8_t timer_num, const uint32_t count) {
-    const tTimerConfig *pConfig = &TimerConfig[timer_num];
+    const tTimerConfig * const pConfig = &TimerConfig[timer_num];
     TC_SetRC(pConfig->pTimerRegs, pConfig->channel, count);
   }
 
   void HAL_timer_isr_prologue(const uint8_t timer_num) {
-    const tTimerConfig *pConfig = &TimerConfig[timer_num];
+    const tTimerConfig * const pConfig = &TimerConfig[timer_num];
     TC_GetStatus(pConfig->pTimerRegs, pConfig->channel);
   }
 #endif

Marlin/src/HAL/HAL_DUE/HAL_timers_Due.h

 
 #define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(STEP_TIMER_NUM)
 #define DISABLE_STEPPER_DRIVER_INTERRUPT()  HAL_timer_disable_interrupt(STEP_TIMER_NUM)
+#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
 
 #define ENABLE_TEMPERATURE_INTERRUPT()  HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
 #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
 void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
 
 FORCE_INLINE static void HAL_timer_set_count(const uint8_t timer_num, const hal_timer_t count) {
-  const tTimerConfig *pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
   pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_RC = count;
 }
 
 FORCE_INLINE static hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
-  const tTimerConfig *pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
   return pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_RC;
 }
 
 FORCE_INLINE static void HAL_timer_set_current_count(const uint8_t timer_num, const hal_timer_t count) {
-  const tTimerConfig *pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
   pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_CV = count;
 }
 
 FORCE_INLINE static hal_timer_t HAL_timer_get_current_count(const uint8_t timer_num) {
-  const tTimerConfig *pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
   return pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_CV;
 }
 
 void HAL_timer_enable_interrupt(const uint8_t timer_num);
 void HAL_timer_disable_interrupt(const uint8_t timer_num);
+bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
 
 //void HAL_timer_isr_prologue(const uint8_t timer_num);
 
 FORCE_INLINE static void HAL_timer_isr_prologue(const uint8_t timer_num) {
-  const tTimerConfig *pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
   // Reading the status register clears the interrupt flag
   pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_SR;
 }

Marlin/src/HAL/HAL_LPC1768/HAL_timers.cpp

   }
 }
 
+bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
+  switch (timer_num) {
+    case 0: return NVIC_GetActive(TIMER0_IRQn);
+    case 1: return NVIC_GetActive(TIMER1_IRQn);
+  }
+  return false;
+}
+
 void HAL_timer_isr_prologue(const uint8_t timer_num) {
   switch (timer_num) {
     case 0: SBI(LPC_TIM0->IR, 0); break; // Clear the Interrupt

Marlin/src/HAL/HAL_LPC1768/HAL_timers.h

 
 #define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(STEP_TIMER_NUM)
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_disable_interrupt(STEP_TIMER_NUM)
+#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
+
 #define ENABLE_TEMPERATURE_INTERRUPT() HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
 #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
 
 
 void HAL_timer_enable_interrupt(const uint8_t timer_num);
 void HAL_timer_disable_interrupt(const uint8_t timer_num);
+bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
 void HAL_timer_isr_prologue(const uint8_t timer_num);
 
 #endif // _HAL_TIMERS_DUE_H

Marlin/src/HAL/HAL_STM32F1/HAL_timers_Stm32f1.cpp

  * TODO: Calculate Timer prescale value, so we get the 32bit to adjust
  */
 
-void HAL_timer_start(uint8_t timer_num, uint32_t frequency) {
+void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
   nvic_irq_num irq_num;
   switch (timer_num) {
     case 1: irq_num = NVIC_TIMER1_CC; break;
   }
 }
 
-void HAL_timer_enable_interrupt(uint8_t timer_num) {
+void HAL_timer_enable_interrupt(const uint8_t timer_num) {
   switch (timer_num) {
     case STEP_TIMER_NUM:
       timer_enable_irq(STEP_TIMER_DEV, STEP_TIMER_CHAN);
   }
 }
 
-void HAL_timer_disable_interrupt(uint8_t timer_num) {
+void HAL_timer_disable_interrupt(const uint8_t timer_num) {
   switch (timer_num) {
     case STEP_TIMER_NUM:
       timer_disable_irq(STEP_TIMER_DEV, STEP_TIMER_CHAN);
   }
 }
 
+bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
+  switch (timer_num) {
+    case STEP_TIMER_NUM: return bool(TIM_DIER(STEP_TIMER_DEV) & STEP_TIMER_CHAN);
+    case TEMP_TIMER_NUM: return bool(TIM_DIER(TEMP_TIMER_DEV) & TEMP_TIMER_CHAN);
+  }
+  return false;
+}
+
 #endif // __STM32F1__

Marlin/src/HAL/HAL_STM32F1/HAL_timers_Stm32f1.h

 #define STEP_TIMER_DEV TIMER_DEV(STEP_TIMER_NUM)
 #define TEMP_TIMER_DEV TIMER_DEV(TEMP_TIMER_NUM)
 
-
-
 //STM32_HAVE_TIMER(n);
 
 #define HAL_TIMER_RATE         (F_CPU)  // frequency of timers peripherals
 
 #define ENABLE_STEPPER_DRIVER_INTERRUPT() timer_enable_irq(STEP_TIMER_DEV, STEP_TIMER_CHAN)
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() timer_disable_irq(STEP_TIMER_DEV, STEP_TIMER_CHAN)
+#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
 
 #define ENABLE_TEMPERATURE_INTERRUPT() timer_enable_irq(TEMP_TIMER_DEV, TEMP_TIMER_CHAN)
 #define DISABLE_TEMPERATURE_INTERRUPT() timer_disable_irq(TEMP_TIMER_DEV, TEMP_TIMER_CHAN)
 // Public functions
 // --------------------------------------------------------------------------
 
-void HAL_timer_start(uint8_t timer_num, uint32_t frequency);
-void HAL_timer_enable_interrupt(uint8_t timer_num);
-void HAL_timer_disable_interrupt(uint8_t timer_num);
+void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
+void HAL_timer_enable_interrupt(const uint8_t timer_num);
+void HAL_timer_disable_interrupt(const uint8_t timer_num);
+bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
 
 /**
  * NOTE: By default libmaple sets ARPE = 1, which means the Auto reload register is preloaded (will only update with an update event)

Marlin/src/HAL/HAL_TEENSY35_36/HAL_timers_Teensy.cpp

   }
 }
 
+bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
+  switch (timer_num) {
+    case 0: return NVIC_IS_ENABLED(IRQ_FTM0);
+    case 1: return NVIC_IS_ENABLED(IRQ_FTM1);
+  }
+  return false;
+}
+
 void HAL_timer_isr_prologue(const uint8_t timer_num) {
   switch(timer_num) {
     case 0:

Marlin/src/HAL/HAL_TEENSY35_36/HAL_timers_Teensy.h

 
 #define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(STEP_TIMER_NUM)
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_disable_interrupt(STEP_TIMER_NUM)
+#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
+
 #define ENABLE_TEMPERATURE_INTERRUPT() HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
 #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
 
 
 void HAL_timer_enable_interrupt(const uint8_t timer_num);
 void HAL_timer_disable_interrupt(const uint8_t timer_num);
+bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
 
 void HAL_timer_isr_prologue(const uint8_t timer_num);
 
 #endif // _HAL_TIMERS_TEENSY_H
-