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--- snippets:watchdog [2013/04/09 16:32] – ba
+++ snippets:watchdog [2017/11/07 22:26] (current) – external edit 127.0.0.1
@@ Line 18: / Line 18: @@
   * A reset during a file function can corrupt a file system
   * When inserting the in line C-nodes the following warnings are generated.\\ This warning can be ignored, because it is about a disabled part of the block diagram. {{:snippets:errorsnwarnings:inline_c_node_not_supported.png?direct|}}
+====== check if a reset was caused by the watchdog ======
+The following snippet can be used to check if the last reset was caused by the watchdog.\\
+{{:snippets:watchdog_check.png?|}}\\ drag and drop this [[VI snippet]] into a LabVIEW block diagram.\\
+The bit 14 of the reset regiter is 1, when a watchdog reset occured.
+The bit is 0 when the reset was caused by other reasons.
+The bit is 0 when it has been read. Hence it can only be read once per reset.
+====== save last programm state ======
+With this snippet you can write and read a memory space that is not initialized at boot time:\\
+{{:snippets:non_resetted_memory.png?|}}\\ drag and drop this [[VI snippet]] into a LabVIEW block diagram.\\
+The value read is undefined, when there was a power loss.
+When a watchdog event occured or a reset signal was applied the value ramains the same as bevore the reset.
+The memory space is written and read by the following functions:
+ - Mass storage device
+ - Format file system
+ - Firmware update
+The usable memory space is 16bytes long. With U32 an I32 Values 4 values can be written at the following locations:
+xFF800000
+xFF800004
+xFF800008
+xFF80000C

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