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questions about jtag/bdm

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threepointone:
I'm currently working on a DAP that will run rockbox, and I'm stuck at one important point in the development process: programming the coldfire chip. I've always been a PIC person, and I haven't ever gotten around to working with chips with JTAG/BDM. Hopefully, some of the developers can help me on this: can the coldfire mcf5250 be programmed via JTAG, or is it necessary to use BDM? If I must use BDM, has anyone ever attempted to actually construct the DIY Coldfire BDM interface (the one with the programmable logic IC)? My project is fairly simple and, at least for now, mostly based on the iRiver hardware, so I don't anticipate lots of low-level software debugging--thus, I'm not yet willing to go for the P&E bdm wiggler. Is it possible to use some of the 68k BDM interfaces with the coldfire chips, or are their protocols completely different?

Thanks for the help! I'll update on my project after it gets further along; if anyone's interested, it's an audiophile DAP that's in its planning stages at head-fi.

LinusN:
No, I haven't tried to build my own wiggler. The 68k BDM variants are not compatible.

threepointone:
so one last question: what about jtag? I know it definitely doesn't have the debugging capabilities, but that might be fine for my purposes.

Thanks again.

threepointone:
I have very, very VERY good news!!! After almost two days scouring the Internet, I've found the solution!!!!!

http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&thread.id=624

The one and only easy-to-build,

LinusN:
Looks really nice! Thanks for the tip!

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