[U-Boot-Users] Extremely tiny footprint

Laurent Pinchart laurent.pinchart at technotrade.biz
Mon Mar 5 09:24:32 CET 2007

Hi Andreas,

>  >[...] not even the Abatron distributor.
> You are talking to *sales people* when you have a technical problem???

The French distributor have a technical support service.

> Neither Abatron nor the BDI, JTAG, U-Boot or whatever is your problem...
> I have to admit that I haven't worked with the BDI1000/2000 yet but I
> know from many people that they use it very successfully.

I have used the BDI2000 successfully for several tasks, but it failed for 
flash programming.

> > I'm still trying to solve the issue, which involves sending hardware
> > samples, NDAs, ... 
> Have you taken a look onto your JTAG signals? Are you using RTCK (on
> ARM)? Have you configured it properly?
> Have you configured the system and JTAG reset behaviour properly?

I have (I'm using an MPC8248 processor by the way). JTAG works fine. Boundary 
scan works, debugging works, programming the flash memory through pure JTAG 
works. Only the fast flash programming mode fails.

> Did you know that an not properly terminated JTAG signals (especially
> pull-up and pull-down resistors and reset connection) can cause LOTS of
> problem in the field even when JTAG never seems to be used?
> Do you use the same scan loop also for other devices on your board?
> Are those devices' JTAG signals connected in parallel or correct serial
> order? Did you configure such scan loop for your BDI?

No other devices, just the MPC8248.

> And why don't you tell us which processor you are using?

I asked for help regarding the BDI200 problem in the past. This thread was 
initially about something completely different, and the processor type was 

> > > The BDI2000 is perfectly scriptable with  expect,  so  what  are  you
> > > missing?
> >
> > The ability to make it fit in the bed of nails. It would involve
> > designing a new mechanical test bed. We obviously can't integrate the BDI
> > in the test bed PCB.
> You could use another JTAG debugger, probably a much smaller device like
> the Rowley CrossConnect Light.

As far as I know, it doesn't support the PowerPC architecture. Another problem 
is that our test bed currently has no USB connectivity.

Best regards,

Laurent Pinchart

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