Add code to the idle hook to test low power mode operation.

Demo/msp430_GCC/FreeRTOSConfig.h

@@ -65,7 +65,7 @@
  *----------------------------------------------------------*/
 
 #define configUSE_PREEMPTION		1
-#define configUSE_IDLE_HOOK			0
+#define configUSE_IDLE_HOOK			1
 #define configUSE_TICK_HOOK			0
 #define configCPU_CLOCK_HZ			( ( unsigned portLONG ) 7995392 ) /* Clock setup from main.c in the demo application. */
 #define configTICK_RATE_HZ			( ( portTickType ) 1000 )

Demo/msp430_GCC/main.c

@@ -132,6 +132,9 @@ static portSHORT prvCheckOtherTasksAreStillRunning( void );
  */
 static void prvSetupHardware( void );
 
+/* Used to detect the idle hook function stalling. */
+static volatile unsigned portLONG ulIdleLoops = 0UL;
+
 /*-----------------------------------------------------------*/
 
 /*
@@ -201,6 +204,7 @@ portTickType xDelayPeriod = mainNO_ERROR_CHECK_DELAY;
 static portSHORT prvCheckOtherTasksAreStillRunning( void )
 {
 static portSHORT sNoErrorFound = pdTRUE;
+static unsigned portLONG ulLastIdleLoops = 0UL;
 
 	/* The demo tasks maintain a count that increments every cycle of the task
 	provided that the task has never encountered an error.  This function 
@@ -223,6 +227,13 @@ static portSHORT sNoErrorFound = pdTRUE;
 	{
 		sNoErrorFound = pdFALSE;
 	}
+
+	if( ulLastIdleLoops == ulIdleLoops )
+	{
+		sNoErrorFound = pdFALSE;
+	}
+
+	ulLastIdleLoops = ulIdleLoops;
 	
 	return sNoErrorFound;
 }
@@ -251,6 +262,15 @@ static void prvSetupHardware( void )
 }
 /*-----------------------------------------------------------*/
 
+void vApplicationIdleHook( void );
+void vApplicationIdleHook( void )
+{
+	/* Simple put the CPU into lowpower mode. */
+	_BIS_SR( LPM3_bits );
+	ulIdleLoops++;
+}
+/*-----------------------------------------------------------*/
+
 
 
 

Demo/msp430_GCC/serial/serial.c

@@ -83,8 +83,8 @@ static xQueueHandle xCharsForTx;
 static volatile portSHORT sTHREEmpty;
 
 /* Interrupt service routines. */
-interrupt (UART1RX_VECTOR) vRxISR( void );
-interrupt (UART1TX_VECTOR) vTxISR( void );
+interrupt (UART1RX_VECTOR) wakeup vRxISR( void );
+interrupt (UART1TX_VECTOR) wakeup vTxISR( void );
 
 /*-----------------------------------------------------------*/
 
@@ -208,7 +208,7 @@ signed portBASE_TYPE xReturn;
 /*
  * UART RX interrupt service routine.
  */
-interrupt (UART1RX_VECTOR) vRxISR( void )
+interrupt (UART1RX_VECTOR) wakeup vRxISR( void )
 {
 signed portCHAR cChar;
 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
@@ -232,7 +232,7 @@ portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
 /*
  * UART Tx interrupt service routine.
  */
-interrupt (UART1TX_VECTOR) vTxISR( void )
+interrupt (UART1TX_VECTOR) wakeup vTxISR( void )
 {
 signed portCHAR cChar;
 portBASE_TYPE xTaskWoken = pdFALSE;