It seems that I am unable to utilize any of the StellarisWare Watchdog functions when I disconnect the JTAG debugger from our custom board. I have put in some debug code to spit stuff out a UART to tell how far I am getting in our SW and have narrowed it down to the first Watchdog access.
On EK-LM4F232 eval board (rev A3 processor) I am able to load code which uses the watchdog and then plug into a USB power adapter (cell phone charger converter) and have everything work as expected. I am not sure if this is an equivalent test as the demo board has an onboard debugger chip which could be doing something that allows this to work.
Looking through the errata, I don't see anything which could be causing the problem but to be safe I have made sure I am performing the work around for each of the stated errata.
Anyone else having this problem? Anything I can do to get this working (other than disabling watchdog access)?