I designed an ARM7 board with LPC2478 MCU. Unfortunately, JTAG
doesn't work like one would expect.
I can download code to FLASH, I can start debugging, BUT every
time it comes to the first STR instruction I get "Could not stop
device" ERROR. When I don't step the code it goes to some garbage
I have ONLY ONE physical pull-up/down resistor on my JTAG 2x10
connector (device is ULINK(non2)).
TCK is pulled to +3.3V with 10k resistor.
Signals DBGEN, TMS, TDI, nTRST, RTCK are terminated inside
I saw on some boards that TCK is pulled down? Is this the source
of my problem ?
Hello Ivan Dodig,
Please have a look at support knowledgebase article http://www.keil.com/support/docs/3030.htm
LPC2478 also has this bootcode which causes trouble during single
Thanks for you're help.
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