Special IDLE for STM32 will execut WFI to sleep until an interrupt occurs

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3324 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 9 insertions, 11 deletions

diff --git a/nuttx/arch/arm/src/common/up_idle.c b/nuttx/arch/arm/src/common/up_idle.c
index ba6affb0e..62557c3a8 100644
--- a/nuttx/arch/arm/src/common/up_idle.c
+++ b/nuttx/arch/arm/src/common/up_idle.c
@@ -62,32 +62,30 @@
  * Name: up_idle
  *
  * Description:
- *   up_idle() is the logic that will be executed when their
- *   is no other ready-to-run task.  This is processor idle
- *   time and will continue until some interrupt occurs to
- *   cause a context switch from the idle task.
+ *   up_idle() is the logic that will be executed when their is no other
+ *   ready-to-run task.  This is processor idle time and will continue until
+ *   some interrupt occurs to cause a context switch from the idle task.
  *
- *   Processing in this state may be processor-specific. e.g.,
- *   this is where power management operations might be
- *   performed.
+ *   Processing in this state may be processor-specific. e.g., this is where
+ *   power management operations might be performed.
  *
  ****************************************************************************/
 
 void up_idle(void)
 {
 #if defined(CONFIG_SUPPRESS_INTERRUPTS) || defined(CONFIG_SUPPRESS_TIMER_INTS)
-  /* If the system is idle and there are no timer interrupts,
-   * then process "fake" timer interrupts. Hopefully, something
-   * will wake up.
+  /* If the system is idle and there are no timer interrupts, then process
+   * "fake" timer interrupts. Hopefully, something will wake up.
    */
 
   sched_process_timer();
-#endif
+#else
 
   /* Sleep until an interrupt occurs to save power */
 
 #if 0
   asm("WFI");  /* For example */
 #endif
+#endif
 }