Hi!
Thank you Sergio and Todd. I tried overnight and solved the problem. I removed
the two 22pF capacitors from the DSP crystal and it works fine...The same
problem happened a few days ago when we were debugging a board of ADuC7020.It
failed to start if there were two 18pF capacitors connected between its crystal
and ground. It is quite strange rite?
Regards,
Rongxi
>
> Dear Ronxi Lee!
>
> The same happened to me some time ago while developing some boards.... the
> only thing i could do at that time was to use the reset (do you have a
> manual one?) to keep it pressed while starting the VDSP software, all
> connected (emulator, hardware etc) and release the reset as soon as i could
> see the purple window that says "crosscore VDSP++ bla bla bla...." or if you
> could start the VDSP as simulator, change the jtag frequency to the minimum
> and change the session to "emulator" with all connected again, see what
> happens and let me know ok? your jtag connections are the same as mine and
> if you could se the continuos scan running that means hardware wise is ok!
> so dont worry that much about hardware, try once again what i told you
> otherwise check the jtag application notes where it says which jumpers have
> to be in to reset the dsp and then you remove them , connect the emulator
> and it works as well.. i dont use the jumpers because is a pain in the neck
> to put them and then remove them to connect the emulator every time, i
> rather reset it while starting vdsp, good look !
>
> Sergio
