First of all you need to buy a Tiao Jtag tool, and you cannot read or write all in one time, you need to split the files.... (because mmi restart self every 5min.)
First of all you need to buy a Tiao Jtag tool, and you cannot read or write all in one time, you need to split the files.... (because mmi restart self every 5min.)
Ok, I already place the order for Tiao but I hope that segger can read too. I try on portions, I read first the IPL, next fpga and so on. It reads but it reads incorrectly. On the first page eprst use segger and he manage to read.
I was try also a year ago with segger but never done, when you get your Tiao all will be fine!
tehnosoftex (24th June, 2017)
Today i had some strange experience with one MMI 3GP unit.
I was able to write both flash chips but, when Y17 (flash chip 2) i was able to write only on portions of 256k each.
I used 5Mgh TCK, do not check write status (really slow write w/o this) and use unlock bypass mode.
Used TIAO USB JTAG with TopJTAG Flash.
This way i flashed the IPL in one pass, FPGA on three passes and emg ifs on 19 passes
Anyone have idea what is not right. Flash chip 1 is ok, 2 MB pieces and the 5-6 min timeout is ok.
Regards.
Today get my tiao usb but cannot see any device in jtag chain. With segger I identify correctly the renesas sh4 and can read. There is some settings that I must do to use tiao?
Ofcourse without boot settings or files its not possible to communicate...
I use topjtag flash programmer with the same settings like for segger but I chose tiao adapter from top jtag. I try all jumper settings on tiao, same result, no device find on jtag chain. On segger top jtag identifies at once the renesas mcu on jtag chain. I use r7785b bsdl file
I managed at last to communicate, Ive chose tiao interface type a instead of type b and it works
What about a24? To read both flashes need a0-a24 connected but according the connection from first page I connect only a0-a23, and can read only a half of firmware.
Sorry. Wrong post..
Last edited by rendezo; 12th September, 2017 at 09:18 PM.
Hi mates, any news?
anyone done similar things for bmw cic and have flash and v850 files? I have done some extracting from spdatens and need someone to confirm that Im doing something right .
Can someone help me how to proceed?aaa.jpg
did you succeed? I did something similar
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