You'll need to change the chip ID (there is a list available on Segger's website), but if you are using a JLink you can also try this and then send the '*erase*' command once you're connected, just as a FYI:

   $ jlinkexe -device nrf52832_xxaa -if swd -speed auto -autoconnect 1


On 11/11/16 18:00, David G. Simmons wrote:
This was the bit I was missing ...

All good now! I guess I should add this to the tutorial.

dg

On Nov 11, 2016, at 11:55 AM, will sanfilippo <[email protected]> wrote:

# Erase the flash
newt debug arduino_zero_blinky

(gdb) mon at91samd chip-erase
chip erased
chip erased
(gdb) x/32wx 0
0x0:    0xffffffff      0xffffffff      0xffffffff      0xffffffff
0x10:   0xffffffff      0xffffffff      0xffffffff      0xffffffff
0x20:   0xffffffff      0xffffffff      0xffffffff      0xffffffff
0x30:   0xffffffff      0xffffffff      0xffffffff      0xffffffff
0x40:   0xffffffff      0xffffffff      0xffffffff      0xffffffff
0x50:   0xffffffff      0xffffffff      0xffffffff      0xffffffff
0x60:   0xffffffff      0xffffffff      0xffffffff      0xffffffff
0x70:   0xffffffff      0xffffffff      0xffffffff      0xffffffff
(gdb) q
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