Enable button interrupts in the MSP432 demos in order to test code paths when an MCU exits low power mode for a reason other than a tick interrupt.

FreeRTOS/Demo/CORTEX_M4F_MSP432_LaunchPad_IAR_CCS_Keil/SimplyBlinkyDemo/main_blinky.c

@@ -121,6 +121,9 @@
 #include "task.h"
 #include "semphr.h"
 
+/* TI includes. */
+#include "gpio.h"
+
 /* Priorities at which the tasks are created. */
 #define mainQUEUE_RECEIVE_TASK_PRIORITY		( tskIDLE_PRIORITY + 2 )
 #define	mainQUEUE_SEND_TASK_PRIORITY		( tskIDLE_PRIORITY + 1 )
@@ -159,6 +162,13 @@ void main_blinky( void );
  */
 static void prvConfigureClocks( void );
 
+/* 
+ * Configure a button to generate interrupts (for test purposes).  This is done
+ * to test waking on an interrupt other than the systick interrupt in tickless
+ * idle mode.
+ */
+static void prvConfigureButton( void );
+
 /*-----------------------------------------------------------*/
 
 /* The queue used by both tasks. */
@@ -177,6 +187,9 @@ void main_blinky( void )
 	/* The full demo configures the clocks for maximum frequency, wheras this
 	blinky demo uses a slower clock as it also uses low power features. */
 	prvConfigureClocks();
+	
+	/* Configure a button to generate interrupts (for test purposes). */
+	prvConfigureButton();
 
 	/* Create the queue. */
 	xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( uint32_t ) );
@@ -286,9 +299,37 @@ static void prvConfigureClocks( void )
 }
 /*-----------------------------------------------------------*/
 
-void vPreSleepProcessing( uint32_t ulExpectedIdleTime )
+static void prvConfigureButton( void )
+{
+volatile uint8_t ucPin;
+
+	/* Configure button S1 to generate interrupts.  This is done to test the
+	code path were low power mode is exited for a reason other than a tick
+	interrupt. */
+	GPIO_setAsInputPinWithPullUpResistor( GPIO_PORT_P1, GPIO_PIN1 );
+	GPIO_enableInterrupt( GPIO_PORT_P1, GPIO_PIN1 );
+	Interrupt_enableInterrupt( INT_PORT1 );
+}
+/*-----------------------------------------------------------*/
+
+void PORT1_IRQHandler( void )
 {
+static volatile uint32_t ux = 0;
+	
+	/* This is the handler for interrupt generated by the button.  The 
+	interrupt is only used to bring the MCU out of low power mode.  It
+	doesn't perform any other function.  The ux increment is just to
+	have something to set breakpoints on and check the interrupt is
+	executing. */
+	ux++;
+	
+	/* Clear the interrupt. */
+	( void ) P1->IV;
+}
+/*-----------------------------------------------------------*/
 
+void vPreSleepProcessing( uint32_t ulExpectedIdleTime )
+{
 }
 /*-----------------------------------------------------------*/
 

FreeRTOS/Demo/CORTEX_M4F_MSP432_LaunchPad_IAR_CCS_Keil/system/IAR/msp432_startup_ewarm.c

@@ -100,6 +100,7 @@ extern void SVC_Handler( void );
 extern void vUART_Handler( void );
 extern void vT32_0_Handler( void );
 extern void vT32_1_Handler( void );
+extern void PORT1_IRQHandler( void );
 //*****************************************************************************
 //
 // The entry point for the application startup code.
@@ -188,7 +189,7 @@ __root const uVectorEntry __vector_table[] @ ".intvec" =
     IntDefaultHandler,                      // DMA_INT2 ISR
     IntDefaultHandler,                       // DMA_INT1 ISR
     IntDefaultHandler,                      // DMA_INT0 ISR
-    IntDefaultHandler,                      // PORT1 ISR
+    PORT1_IRQHandler,                      // PORT1 ISR
     IntDefaultHandler,                      // PORT2 ISR
     IntDefaultHandler,                      // PORT3 ISR
     IntDefaultHandler,                      // PORT4 ISR