Lost JTAG

john2 · ‎2008-03-12

Posted on March 13, 2008 at 05:47

Lost JTAG

john2 · ‎2011-05-17

Posted on May 17, 2011 at 09:50

Hi,

I'm trying to write a bootloader to live in flash bank 1 and switch to bank 0 as appropriate, usual stuff.

I've managed to blow some simple code into bank 1, which runs if I power cycle the board, but I've lost JTAG connectivity. I get the message ''Too many JTAG devices in chain''. Of course, there's only the ARM chip.

I'm using STR912FAW44 and Keil ULINK2, Keil compiler.

Can anybody please help in getting my board back?

Cheers

John

john2 · ‎2011-05-17

Posted on May 17, 2011 at 09:50

Sorted it!

http://www.keil.com/support/docs/3215.htm describes how to wipe the chip and start again.

Pity their search engine didn't find it, but never mind.

Cheers

John