Lpc2000

The watchdog reset won't work because the bootloader skips P0.14 
sampling when WDTOF bit is set as indicated in the bootloader 
flowchart.

--- In lpc2000@yahoogroups.com, Leighton Rowe <leightonsrowe@y...> 
wrote:
> How about implementing the watchdog? That's closest
> thing to a hardware reset (without pressing the
> switch). 
> 
> You might run into a few issues using the watchdog
> timer, especially if it's an lpc2114 or lower...I'm
> not sure which lpc has the improved version of
> watchdog timer though. 
> 
> --- Richard <richas@y...> wrote:
> > Hmmm,
> >    Branching to 0x00 is not the same as a reset, IOW
> > you will not end 
> > up in the bootloader that samples P0.14 and enters
> > ISP mode etc.
> > 
> > Rich
> > 
> > --- In lpc2000@yahoogroups.com, "lpc2100"
> > <lpc2100@y...> wrote:
> > > Owen 
> > > 
> > > Try this sequence from your program which needs to
> > be updated.
> > > 
> > > Make bootloader vectors visible 
> > > Write 0x0 to the MEMMAP (0xE01FC040)
> > > 
> > > Select P0.14 as output. You may want to do a
> > read-modify-write here.
> > > Write 0x4000 to the IODIR (0xE0028008)
> > > 
> > > Make P0.14 Low
> > > Write 0x4000 to the IOCLR (0xE002800C)
> > > 
> > > Branch to address 0x0 in ARM mode.
> > > 
> > > This should invoke the bootloader in ISP mode.
> > Update the code via 
> > > serial ISP and the next reset should execute the
> > new code.
> > > 
> > > Hope this works for you.
> > > 
> > > Tom
> > > 
> > > 
> > > --- In lpc2000@yahoogroups.com, Owen Mooney
> > <ojm@s...> wrote:
> > > > I am building a product that will be encapulated
> > in a blob of 
> > epoxy.
> > > > 
> > > > I live in the real world so I know that with any
> > new product 
> > > firmware 
> > > > upgrades are almost inevitable. These can be
> > loaded into
> > > > a LPC2106 PROVIDED that the P0.14 can be
> > accessed Tricky from 
> > > inside the 
> > > > blob.
> > > > 
> > > > Is it possible to to activate the code that does
> > the boot loading 
> > > from 
> > > > within my old program, ie jump to some location
> > like we do for 
> > IAP 
> > > > programming
> > > > 
> > > > Thanks
> > > > 
> > > > Owen Mooney
> > 
> > 
> 
> 
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