Making own JTAG for ARM processor

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patlas

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Hi,

I want to make my own JTAG for ARM processor Does somebody know where may I find some information of this protocol?
I think that AVR processor will be good for that solution but I can't find any valuable information of JTAG ARM protocol
 

I didn't express my idea as clearly as I want to
I want to "invent" my own JTAG to ARM processors based for example on AVR
Some "block" diagram:
USB/RS232/... -> AVR/STM32 (heart of my programmer) -> programming ARM family
 

I have been thinking about STM32f10x and simple veriosion of LPC
I want to write almost whole code as PC interface, AVR/STM will be only a data receiver and connector to ARM processor. Thats projecdt gave me my university professor so I've to do it
 

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