Well, never mind, I rebooted the target and the host systems, did a "repo sync" of my chromeos setup, did a full firmware rebuild (described in the care and feeding doc) then did a flash of the coreboot firmware, followed by a flash of the ec firmware and the target system automatically booted successfully after the ec firmware flash.

Perhaps it could have been an issue with unsynchronized ec and coreboot firmware?

Anyway, I no longer have a flashing issue.

--Charles

On 07/08/2018 01:34 PM, Charles Marslett wrote:

Hi folks, I have, for the first time ever, tried to flash the EC firmware on a Google Grunt EVT platform. I have succeeded in the past flashing the coreboot image but the command sequence to flash the EC is somewhat different. Here is the output I see:

(cr) ((8ccc569...)) cmarslett@5000G ~/trunk/src/scripts $ ../platform/ec/util/flash_ec --board=grunt --image=../../grunt-build/ec.bin
INFO: Using servo_micro.
INFO: Using ec image : ../../grunt-build/ec.bin
INFO: Flashing chip npcx_spi.
1+0 records in
1+0 records out
16252928 bytes (16 MB, 16 MiB) copied, 0.0563104 s, 289 MB/s
flashrom v0.9.9 : 622128c : Jul 05 2018 14:19:12 UTC on Linux 4.15.0-24-generic (x86_64)
Calibrating delay loop... OK.
Raiden: Serial number SNCQ01007 matched device bus=0x02,address=0x05 | Servo Micro
Erasing and writing flash chip... Verifying flash... VERIFY FAILED at 0x00000000! Expected=0x5e, Read=0xff, failed byte count from 0x00000000-0x00ffffff: 0xc32c8
Your flash chip is in an unknown state.
Get help on IRC at irc.freenode.net (channel #flashrom) or
mail flashrom@flashrom.org with FAILED: your board name in the subject line!
-------------------------------------------------------------------------------
DO NOT REBOOT OR POWEROFF!
FAILED
INFO: Restoring servo settings...

I did not reboot or poweroff, but it did finally shut down (at least all the LEDs went off).

What do you recommentd next?

Thanks,
Charles Marslett