> maybe you should remove the unit from the board and use it alone.
> The serial can be connected with applied cable directly on the unit too.
> Use jumpers to activate the reset and boot, then remove reset jumper,
> and after 30 seconds remove boot jumper.
>
> If it continues to run a program after that procedure, you have a broken unit.
> If not, the boot key is not correctly wired on the "Regler Board".
The boot-key is correctly wired on the CC2-ReglerBoard
I have uploaded the OS many times on CC2-Units mounted on the
CC2-ReglerBoard. So there can not be the problem.
The only different thing is that the reset takes about one second more time
because of the onboard watchdog-circuit.
But this would only mean that you must press the boot-key a little bit longer.
> > > Tnx Martin for your response, the unit doesn't show a blank screen, it just stays in hostmodus
> > > (when it was in hostmodus before I go through the bootroutine)
> > > or it resets and runs a programm (when the unit was running a programm).
> > > Whatever I do, I never get a blank screen.
Bart, here you misunderstood Martin. There will never be a blank screen !!
(Only, if you press boot before connecting the supply)
If you try to set the boot-mode there will be no new message.
You will further see the last message.
e.g. the unit was in hostmode before you set the boot-mode there will
further displayed the message "HOSTMODE".
If you try to set the boot-mode and the message in the display dosen't
change then you are in the boot-mode.
> > > >
> > > > The voltage level of the boot line seems to be OK for me.
> > > > TTL-low level is below 0,8 Volt. And 2,5 Volt is definitely more than this.
> > > >
The boot-pin(BSL) is shared with the address-bus for the RAM and FLASH.
So you will measure 2,5 volts, but in real there are 0 and 5 volts, because
there is activity on the address-bus.
regards André H.
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Re: Bootstrap modus (von bart meijer - 3.04.2003 15:41)Re: Bootstrap modus (von bart meijer - 3.04.2003 18:19)