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how can i build up a JTAG interface for connecting my phone (SAMSUNG OR etc - ARM 7 TO ARM 9 CPU) to my computer? Answered

I want to access my cellphone secure data same as boot area, and repair some errors same as boot error. thanks alot

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sparkyuiop (author)2012-06-05

I'm not an expert on this but I have looked into this before as I'm good with electronics and building stuff and didn't want to shell out for the ORT JTAG or similar device.
What I found it came down to was signal timings (again I know little about this) and the ORT system has a programmed chipset that can read / write commands at the required timings using a software interface written for the user control.
I believe you can RS232 TTL some commands but it will achieve little and Terminal script is complicated.
Some people that have tried the serial way have soft / hard bricked their bootloaders often and been left with the link dead. It is also painfully slow.
I'd recommend the ORT system as their are lot's of updates for a variety of phones and a good user support forum.

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