How to program (Bootloader) a flash(boot) memory through JTAG?

[vishwa]

Hi

How to program (Bootloader) a flash(boot) memory through JTAG and/or using microcontroller.

Any help will be appreciable.


Regards,
Vishwa

 

[tom_hanks]

Re: JTAG Flashing

Hiya,
Usually memories are non-Jtag devices....
U need a BSDL file of microcontroller (a JTAG device) and flash.
after that u need a JTAG EDA tools...XTAG,Green hills or any other JTAG tools..

in that u need to define a link of the JTAG device to flash..
different tools support different laguage..

after that u need to load the signals(pins) of microcontroller with ur programming file..like stapl /pof..
then thru JTAG u will run the write cycle on the flash...
example..
/CS=0,/WR=0,ADDRESS=xxxx,DATA= UR FILE..

THEN JUST DO REQUIRED ACTION DEPENDS UPON THE FLASH..WRITE PROTECT, OR SETTING THE DONE BIT..

ITS IS EASY...JOB..ITS CALLED AS ISP (in system programming)

any more doubts??

tom...




How to program (Bootloader) a flash(boot) memory through JTAG and/or using microcontroller.

 

[buenos]

JTAG Flashing

i think these j-tag modes enable just the programming of parallel flash memories. Some DSPs cans bootload fom spi-memories. If you want to bootload from an Spi device, i don't think, that you can to program via j-tag.
So that types, you can program via simple spi programmers, like ponyprog. I hope, but i'm not shure. knows anybody anything about that?