jtaghowto

Howto get JTAG working with adm5120

first of all you need a jtag hardware interface

There are a lot of parallel cabels on the net that will du the job.

But my way is different, I use the adm5120 itself. Because it is cheap and easyer to replance then my mainboard and my new laptop does not even have ethernet.

modify a 5120 to get jtag interface

• you need a running linux on the adm5120 and the kernel sources
• jtagkernelmodul jtagkernelmodulis the source of the kernelmodul it needs to be compiled for the openwrt kernel you have
• the readid tool is a simple short test program to verify the kernel modul and the hardware interface. it reads out the amd5120 device id

get a gdb commection

• jtagdaemon is the pice between the hardware and gdb, also needs to be compiled for the mipsel to run on the openwrt