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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.

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

Posted: Tue Dec 17, 2019 11:20 pm
by janlugt
@LattePanda, could you respond to this thread? If there is no way for me to revive my LattePanda, I'll try to reach out to customer service.

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

Posted: Fri Jan 17, 2020 4:58 am
by janlugt
I ended up buying some chips of eBay, replaced the faulty BIOS chip, and everything works again now.

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

Posted: Sat Apr 18, 2020 7:13 am
by paolo977
Buongiorno ho seguito la guida ma non riesco a leggere L'IC. nel mio caso la sigla è
25LQ64CVIG. ho erronaemente con win10 funzionante aggiornato il bios con un file errato. risultato al riavvio led blue e rosso. ho acquistato il programmatore ma non vuole saperne di funzionare. mi dice chip connesso legge ma i risultati sono tutti F. ho una tlro minipc funzionante con il medesimo chip ...ho provato anche quello ma nulla. parlo da ingnorante ...forse non è compatibile essendo un ic con sigle differente?

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

Posted: Tue Apr 21, 2020 9:49 pm
by Ocelot
janlugt wrote:
Fri Nov 08, 2019 6:33 pm
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.
Try switching the clips (If you use it) around. I found that when I clip on the connector to the programmer a red led lights up. Mess around with your programmer till it works. Also, check if you have the winbond w25q64 chip instead. Hope that helps!
:D

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

Posted: Tue Apr 21, 2020 10:04 pm
by Ocelot
paolo977 wrote:
Sat Apr 18, 2020 7:13 am
Buongiorno ho seguito la guida ma non riesco a leggere L'IC. nel mio caso la sigla è
25LQ64CVIG. ho erronaemente con win10 funzionante aggiornato il bios con un file errato. risultato al riavvio led blue e rosso. ho acquistato il programmatore ma non vuole saperne di funzionare. mi dice chip connesso legge ma i risultati sono tutti F. ho una tlro minipc funzionante con il medesimo chip ...ho provato anche quello ma nulla. parlo da ingnorante ...forse non è compatibile essendo un ic con sigle differente?
I suggest you use AsProgrammer on win10 and use gd25q64. Check to make sure you have good connections. If you have a clip with your programmer ^^^Look at my previous post^^^, make sure that all of your connections are good. It should have a red light if the IC is still connected to the board. Make sure you are using the right bios and press erase, then program with the file. If you read afterwards, it shouldn't be all F. If you boot up and it looks like it's working but you get no HDMI picture, read here http://www.lattepanda.com/topic-f10t1175.html