CVS: blob/include/blob/arch shannon.h,1.6,1.7

[Russ D. <ru...@us...>]

Update of /cvsroot/blob/blob/include/blob/arch
In directory usw-pr-cvs1:/tmp/cvs-serv19527

Modified Files:
	shannon.h 
Log Message:
added led diag gpio and instructions for shannon

Index: shannon.h
===================================================================
RCS file: /cvsroot/blob/blob/include/blob/arch/shannon.h,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -d -r1.6 -r1.7
--- shannon.h	15 Jan 2002 01:59:34 -0000	1.6
+++ shannon.h	26 Feb 2002 08:39:57 -0000	1.7
@@ -39,9 +39,37 @@
 
 
 /* GPIO for the LED */
-#define LED_GPIO		(0x00000000) /* safe mode: no GPIO, no LED */
-
+#define LED_GPIO		(0x00040000) /* GPIO 18, codec (ucb1300) reset */
 
+/* to connect this up, you'll need an LED and a resistor (100ohm - 1k will probably do)
+ *
+ *             o o o  =\ =o o o o            o o    ___________ \
+ *           33| |  \   \ |//|               | |  1////-33 \ \ \ |/--\o
+ *           --+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-- |||| --+-+-+-+-+-+-+
+ *           | : : : : : : : : : : : : : : : : : | |||| | : : : : : : :
+ *           --+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-- |||| --+-+-+-+-+-+-+
+ * <-- front 34o o o o o|o o   J601  o|||||||| o  2|||| 34o J600o|o|o|o       back -->
+ *             |       /   /\       /\o|o|o|o|     ||||   |      | | |
+ *                         ||       ||
+ *                         ||       ||
+ *                       GPIO18     GND
+ *
+ * This is supposed to be ascii art of the daughter board rotated 90 degrees clockwise.
+ * An LED and resistor should be connected between the two vias indicated by GPIO18 and
+ * GND. These vias are on either side of the J601 silk label. The circuit should be connected
+ * as shown below (other interpretations sholud work as well).
+ *
+ *
+ *                        |\ |
+ *    GPIO18 o---/\/\/\---| >|---------o GND 
+ *                        |/ |
+ *
+ *                 R1      D1
+ *
+ *
+ * A little excessive description maybe, but I don't want anyone blowing up their tux :)
+ *
+ */
 /* Shannon memory layout is a bit precious because we want to be able
  * to load blob at the correct location for both 8 and 32MB
  * SODIMMs. We assume that the following amount of memory is at least