Mark Gottscho / HardwareTimersLib

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Fork of HardwareTimersLib by Mark Gottscho

Diff: Timer_PIT.cpp

Revision:
9:dff7c891ec77
Parent:
8:23c04123395c
Child:
11:e0442c8b182b
diff -r 23c04123395c -r dff7c891ec77 Timer_PIT.cpp
--- a/Timer_PIT.cpp	Tue Mar 11 02:42:03 2014 +0000
+++ b/Timer_PIT.cpp	Tue Mar 11 03:56:01 2014 +0000
@@ -36,13 +36,14 @@
     if (!__valid)
         return 0;
         
-    // CRITICAL SECTION -- ALL INTERRUPTS MUST BE STOPPED!
-    __disable_irq();
-    uint32_t tick = PIT->CHANNEL[0].CVAL; //counts down
-    uint32_t count = __count;
-    __enable_irq();
-    // END CRITICAL SECTION
-    
+    uint32_t tick;
+    uint32_t count;
+
+    __disable_irq(); //CRITICAL SECTION -- ALL INTERRUPTS MUST BE STOPPED!
+    tick = PIT->CHANNEL[0].CVAL; //counts down
+    count = __count;
+    __enable_irq(); //END CRITICAL SECTION
+        
     //Convert to ticks
     return (__rolloverValue - tick) + count * __rolloverValue;
 }
@@ -69,7 +70,7 @@
 }
 
 void Timer_PIT::__stop_timer() {
-    PIT->MCR |= PIT_MCR_MDIS_MASK; //Setting MDIS bit disables the timer.
+    PIT->CHANNEL[0].TCTRL &= ~PIT_TCTRL_TEN_MASK; //Disable the timer.
 }
 
 void Timer_PIT::__timer_isr() {