1 files changed, 11 insertions, 3 deletions
diff --git a/nuttx/arch/pjrc-8051/src/up_initialize.c b/nuttx/arch/pjrc-8051/src/up_initialize.c
index 20d2e8122..ae297d585 100644
--- a/nuttx/arch/pjrc-8051/src/up_initialize.c
+++ b/nuttx/arch/pjrc-8051/src/up_initialize.c
@@ -51,9 +51,13 @@
  * Private Data
  ************************************************************/
 
-/* TRUE if processing an interrupt */
+/* This is the top of the stack containing the interrupt stack frame.  It
+ * is set when processing an interrupt.  It is also cleared when the
+ * interrupt returns so this can also be used like a boolean indication that
+ * we are in an interrupt.
+ */
 
-boolean g_ininterrupt;
+ubyte g_irqtos;
 
 /************************************************************
  * Private Functions
@@ -87,12 +91,16 @@ void up_initialize(void)
 {
  /* Initialize global variables */
 
-  g_ininterrupt = FALSE;
+  g_irqtos = 0;
 
   /* Initialize the interrupt subsystem */
 
+  up_irqinitialize();
+
   /* Initialize the system timer interrupt */
 
+  up_timerinit();
+
   /* Initialize the serial console support */
 }