Re-design vsprintf so that it does not use so much stack; handle 8051's 2-byte generic pointers.

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@38 42af7a65-404d-4744-a932-0658087f49c3

arch/pjrc-8051/defconfig

@@ -102,6 +102,14 @@ CONFIG_DISABLE_PTHREAD=y
 CONFIG_DISABLE_SIGNALS=y
 CONFIG_DISABLE_MQUEUE=y
 
+#
+# Misc libc settings
+#
+# CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a
+#   little smaller if we do not support fieldwidthes
+#
+CONFIG_NOPRINTF_FIELDWIDTH=y
+
 #
 # Allow for architecture optimized implementations
 #

arch/pjrc-8051/src/up_allocateheap.c

@@ -84,4 +84,4 @@ void up_addregion(void)
 {
   mm_addregion((FAR void*)UP_HEAP2_BASE, UP_HEAP2_END - UP_HEAP2_BASE);
 }
-#endif
+#endif

arch/pjrc-8051/src/up_irq.c

@@ -69,11 +69,15 @@
 
 void up_irqinitialize(void)
 {
+#if 1 /* remove me */
+  IE = 0;
+#else
   /* Enable interrupts globally, but disable all interrupt
    * sources.
    */
 
   IE = 0x80;
+#endif
 }
 
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