Re: Cannot access memory at address 0xffff

On Wed, Jul 24, 2013 at 09:04:33AM -0700, garyr wrote:
> If my question is not appropriate for this ng please suggest another.
> 
> A board I've built has a MSP430F1232 on it. I use an Olimex dongle to connect to
> the JTAG. I'm using GCC 4.3.6. When I start msp430-gdbproxy the device is
> recognized. When I run msp430-gdb and try to program the device I get the
> following:
> 
>     (gdb) set remoteaddress 64
>     (gdb) set remotetimeout 999999
>     (gdb) target remote localhost:2000
>     Remote debugging using localhost:2000
>     Cannot access memory at address 0xffff

This is normal for an erased chip.

>     (gdb) monitor reset
>     Resetting target - all methods...done
>     (gdb) erase
>     Erasing all flash memory
>     Erasing target flash - all...
>     MSP430 error: Could not preserve/restore device memory (12)

I always use "monitor erase" from GDB. Not sure if "erase" has the same
effect, since that's a GDB command, whereas anything prefixed with
monitor is sent to the server (gdbproxy) without GDB's interference.

>     (gdb) monitor reset
>     Resetting target - all methods...done
>     (gdb) load pmsa.elf
>     Loading section .text, size 0xa2e lma 0xe000
>     Load failed
> 
> There is nothing else on this board except the uP chip, voltage regulator (3.3
> volts) and a few bypass capacitors. The MSP430 was purchased from Digi-Key a
> couple of weeks ago. I've been very careful handling the chip, wearing a ground
> strap.
> 
> A similar board I built several years ago which also has a MSP430F1232 on it
> works correctly.
> 
> Any suggestions?

MSPDebug should support this chip (let me know if it doesn't work), and
would be easier to use if you just want to program, rather than debug. I
assume you're using an MSP430-JTAG-TINY? If you don't have any luck
getting gdbproxy working, try this:

    mspdebug olimex -j "prog pmsa.elf"

Cheers,
Daniel

-- 
Daniel Beer <[email protected]>    www.dlbeer.co.nz
IRC: inittab (Freenode)    PGP key: 2048D/160A553B

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