Update MPS430X ports so the sleep mode bits are cleared on exit from the tick interrupt.

Update heap_4.c.

Source/portable/CCS/MSP430X/port.c

@@ -213,6 +213,7 @@ interrupt void vTickISREntry( void )
 {
 extern void vPortTickISR( void );
 
+	__bic_SR_register_on_exit( SCG1 + SCG0 + OSCOFF + CPUOFF );
 	#if configUSE_PREEMPTION == 1
 		extern void vPortPreemptiveTickISR( void );
 		vPortPreemptiveTickISR();

Source/portable/CCS/MSP430X/portext.asm

@@ -88,12 +88,6 @@ portRESTORE_CONTEXT .macro
 	pop_x	r15
 	mov.w	r15, &usCriticalNesting
 	popm_x	#12, r15
-		
-	;The last thing on the stack will be the status register.
-    ;Ensure the power down bits are clear ready for the next
-    ;time this power down register is popped from the stack.
-	bic.w   #0xf0, 0( sp )
-		
 	pop.w	sr
 	ret_x
 	.endm

Source/portable/IAR/MSP430X/port.c

@@ -214,6 +214,7 @@ __interrupt __raw void vTickISREntry( void )
 {
 extern void vPortTickISR( void );
 
+	__bic_SR_register_on_exit( SCG1 + SCG0 + OSCOFF + CPUOFF );
 	vPortTickISR();
 }
 

Source/portable/IAR/MSP430X/portext.s43

@@ -95,12 +95,6 @@ portRESTORE_CONTEXT macro
 	pop_x	r15
 	mov.w	r15, &usCriticalNesting
 	popm_x	#12, r15
-		
-	/* The last thing on the stack will be the status register.
-	Ensure the power down bits are clear ready for the next
-	time this power down register is popped from the stack. */
-	bic.w   #0xf0, 0( sp )
-		
 	pop.w	sr
 	reta
 	endm
@@ -122,7 +116,9 @@ portRESTORE_CONTEXT macro
 vPortTickISR:
 
 	/* The sr is not saved in portSAVE_CONTEXT() because vPortYield() needs
-	to save it manually before it gets modified (interrupts get disabled). */
+	to save it manually before it gets modified (interrupts get disabled).
+	Entering through this interrupt means the SR is already on the stack, but
+	this keeps the stack frames identical. */
 	push.w sr
 	portSAVE_CONTEXT
 

Source/portable/MemMang/heap_4.c

@@ -356,7 +356,7 @@ unsigned char *puc;
 }
 
 
-#define INCLUDE_TEST_CODE 1
+#define INCLUDE_TEST_CODE 0
 #if INCLUDE_TEST_CODE == 1
 
 #define heapMAX_TEST_BLOCKS 6
@@ -366,6 +366,7 @@ void vTestHeap4( void )
 void *pvReturned;
 static void *pvUsedBlocks[ heapMAX_TEST_BLOCKS ];
 unsigned long ulIndex = 0, ulSize, ulRandSample;
+size_t xSize1, xSize2, xSize3;
 static const unsigned long ulCombinations[ 6 ][ 3 ] =
 {
 	{ 0, 1, 2 },
@@ -530,13 +531,17 @@ static const unsigned long ulCombinations[ 6 ][ 3 ] =
 	}
 
 	/* Do the same, but using random block sizes. */
-	for( ulRandSample = 0; ulRandSample < 0x5ffff; ulRandSample++ )
+	for( ulRandSample = 0; ulRandSample < 0xffffffUL; ulRandSample++ )
 	{
+		xSize1 = rand();
+		xSize2 = rand();
+		xSize3 = rand();
+
 		for( ulIndex = 0; ulIndex < 6; ulIndex++ )
 		{
-			pvUsedBlocks[ 0 ] = pvPortMalloc( rand() );
-			pvUsedBlocks[ 1 ] = pvPortMalloc( rand() );
-			pvUsedBlocks[ 2 ] = pvPortMalloc( rand() );
+			pvUsedBlocks[ 0 ] = pvPortMalloc( xSize1 );
+			pvUsedBlocks[ 1 ] = pvPortMalloc( xSize2 );
+			pvUsedBlocks[ 2 ] = pvPortMalloc( xSize3 );
 
 			vPortFree( pvUsedBlocks[ ulCombinations[ ulIndex ][ 0 ] ] );
 			vPortFree( pvUsedBlocks[ ulCombinations[ ulIndex ][ 1 ] ] );