Lpc2000

Hallo,

we would like to start a lpc2294 after a reset.

We flashed the program with the IAR J-Link, with the debugger the 
program runs.

After removing the J-Link and a reset, the program doesn't work.

When we reconnect the J-Link to check the flash memory we can't go 
with  the single step function through the program.
The first single step goes into the flashloader area.

What's wrong?

101 reasons but most probable that CRC at address 0x14 is wrong.

Ian

--- In lpc2000@yahoogroups.com, "sifiland" <sifiland@y...> wrote:

> 
> Hallo,
> 
> we would like to start a lpc2294 after a reset.
> 
> We flashed the program with the IAR J-Link, with the debugger the 
> program runs.
> 
> After removing the J-Link and a reset, the program doesn't work.
> 
> When we reconnect the J-Link to check the flash memory we can't go 
> with  the single step function through the program.
> The first single step goes into the flashloader area.
> 
> What's wrong?

Il giorno mar, 30-11-2004 alle 17:17 +0000, ian48harry ha scritto:
> 
> 101 reasons but most probable that CRC at address 0x14 is wrong.

Or exception vector table isn't located in flash.

See MEMMAP register.

-- 
FabioDB <fabiodib@...>
Altraqua

CRC is at the address 0x14 falsh.  which I must do, so that one gets 
correct CRC
sifiland

--- In lpc2000@yahoogroups.com, "ian48harry" <ahi93@d...> wrote:
> 
> 101 reasons but most probable that CRC at address 0x14 is wrong.
> 
> Ian
> 
> --- In lpc2000@yahoogroups.com, "sifiland" <sifiland@y...> wrote:
> > 
> > Hallo,
> > 
> > we would like to start a lpc2294 after a reset.
> > 
> > We flashed the program with the IAR J-Link, with the debugger the 
> > program runs.
> > 
> > After removing the J-Link and a reset, the program doesn't work.
> > 
> > When we reconnect the J-Link to check the flash memory we can't 
go 

> > with  the single step function through the program.
> > The first single step goes into the flashloader area.
> > 
> > What's wrong?

It is the two's compliment of the rest of the vector group, 8 32bit 
word, (for the calculation add in 0x00 for address 0x14.  When 
calculated add that value in your download for address 0x14.  
Assuming the P.14 pin not held, the boot process for the LPC2000 
family is to do a CRC on the vector group, if it matches the value in 
0x14 then it will run your code.  If CRC fails it will enter 
bootloader.

See other postings re calculation.

Ian

--- In lpc2000@yahoogroups.com, "sifiland" <sifiland@y...> wrote:
> 
> CRC is at the address 0x14 falsh.  which I must do, so that one 
gets 
> correct CRC
> sifiland
> 
> --- In lpc2000@yahoogroups.com, "ian48harry" <ahi93@d...> wrote:
> > 
> > 101 reasons but most probable that CRC at address 0x14 is wrong.
> > 
> > Ian
> > 
> > --- In lpc2000@yahoogroups.com, "sifiland" <sifiland@y...> wrote:
> > > 
> > > Hallo,
> > > 
> > > we would like to start a lpc2294 after a reset.
> > > 
> > > We flashed the program with the IAR J-Link, with the debugger 
the 

> > > program runs.
> > > 
> > > After removing the J-Link and a reset, the program doesn't work.
> > > 
> > > When we reconnect the J-Link to check the flash memory we can't 
> go 
> > > with  the single step function through the program.
> > > The first single step goes into the flashloader area.
> > > 
> > > What's wrong?