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Re: [TUTORIAL] LattePanda Bios Reflash Save LP from red light

Posted: Mon Sep 30, 2019 4:59 pm
by guadalupeescoto
Hello,
I am following your tutorial and it is very good explained.
When i want to erase the chip a get this message

Possible protection is enabled. Press "Unprotect" and check datasheet
Erasing memory...

Do you know what is the cause.
Thank you.

Re: [TUTORIAL] LattePanda Bios Reflash Save LP from red light

Posted: Tue Oct 08, 2019 8:28 am
by LattePanda
Hi guadalupeescoto,

could you please take a pic of this message? we don't have this problem always.
did you connect power when reflashing? Please disconnect it if you do.

Re: [TUTORIAL] LattePanda Bios Reflash Save LP from red light

Posted: Fri Nov 08, 2019 6:33 pm
by janlugt
I have the same issue. I tried with both ASProgrammer and the CH341A program. I have tried reading the contents of the bios multiple times, and I get different results, so my guess something is getting corrupted somewhere (or maybe a bad chip?).
On AsProgrammer, I get the following error:

Code: Select all

Программатор SPI, I2C, Microwire FLASH/EEPROM v1.4.1
http://forum.easyelectronics.ru/viewtopic.php?f=17&t=10947
asprogrammer@inbox.ru
Current programmer: CH341
10:24:29
Possible protection is enabled. Press "Unprotect" and check datasheet
Erasing memory...
Done
Execution time: 0:00:00
Current programmer: CH341
10:27:27
Possible protection is enabled. Press "Unprotect" and check datasheet
Erasing memory...
Done
Execution time: 0:00:00
Current programmer: CH341
10:27:45
Possible protection is enabled. Press "Unprotect" and check datasheet
Erasing memory...
Done
Execution time: 0:00:00
Current programmer: CH341
Old SREG: 00100000(0x20), 10101010(0xAA)
New SREG: 01010101(0x55), 01000101(0x45)
Current programmer: CH341
Old SREG: 10100000(0xA0), 00010001(0x11)
New SREG: 10101010(0xAA), 01010101(0x55)
For the other program, I took a screenshot.