Strange boot failure

[karawin]

Hi,

After a wrong IPR AT command, I broke the software of my brand new ESP8266.
No problem, the flash boot is ok and i flash it with esptool.py. but but...

At power on I receive at 74880 bauds
ets Jan 8 2013,rst cause:2, boot mode:(3,7)

load 0x40100000, len 816, room 16
tail 0
chksum 0x8d
load 0x3ffe8000, len 788, room 8
tail 12
chksum 0xcf
ho 0 tail 12 room 4
load 0x3ffe8314, len 288, room 12
tail 4
chksum 0xcf
csum 0xcf

2nd boot version : 1.2
SPI Speed : 40MHz
SPI Mode : DIO
SPI Flash Size : 8Mbit
jump to run user1


And nothing else.

on reset i receive
ets Jan 8 2013,rst cause:2, boot mode:(3,6)

And nothing else.


It seems that the flash is read only at power on, and then stop.

I checked many other release with the same results.
My configuration has an external power source at 3.3v and all GPIO 2 in fact) are shifted to VCC or ground for flash.

Have I burned the ESP?

[karawin]

It seems that the flash chip is out of service now. Every -flash_verify fails.
Ok, I give up. A brand new ESP with a dying component.
Its time to change my 2$ board.

[ESP_Faye]

Hi,

Could you have a try with our ESP Flash Download Tool http://bbs.espressif.com/viewtopic.php?f=57&t=433?

Here is our latest AT firmware http://bbs.espressif.com/viewtopic.php?f=46&p=5964#p5964.

[karawin]

Hi,

I tried every download tools including yours.
But I had a doubt and needed a verify feature.
This verify worked at the beginning, but now it fails.

Really, i think that the flash chip has gone...

Thanks.
https://www.dropbox.com/s/bztxtxpn6xbnvve/2016-03-13%2011.54.23.jpg?dl=0