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CH341a - Questions

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    #16
    Re: CH341a - Questions

    I tried to uptade the driver from chosen location, windows said that this driver not used for this device and I try old device modul from device manager to install the driver therefore windows says this driver can not suitable for amd64 driver I try all version of driver and/or all versiyon program packet (until version 1.31) nothing change ...

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      #17
      Re: CH341a - Questions

      Wrong connected ! Should rotated 180 degrees
      Originally posted by katfish View Post
      Thanks for response.

      Did verify ok after writing the BIN file. Same exact chips. It's been a long time since I've meddled in anything bios related. I seem to recall many moons ago that HP did some strange stuff with DMI I think?? But that's old stuff.

      Maybe I'm putting the adapter board on backwards then. Wasn't able to read the chip at all with pin 1 to pin 1 on the YFT board. With pin 1 on pin 5, it read ok. Or did it? LoL ... I watched a video on some discussion about it. Host claimed it was incorrect.

      Here's a pic ... should the adapter on top be rotated 180 degrees?

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        #18
        Re: CH341a - Questions

        MY PROBLEM WITH THE PROGRAMMER IS THAT AFTER WRITING BIN FILE IT SAY CHIP AND CONTENT MISMACHED , EVEN WITH THE BACKUP BIN IT SHOW MIS MATCH CAN SOMEONE HELP ME ON THIS PLS. MY EMAIL nasirakande@gmail.com

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          #19
          Re: CH341a - Questions

          read the chip, then use the verify option - do it atleast 5 times.
          that will tell if it's reading o.k. - if not then it's probably a bad connection to the chip or adapter.

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            #20
            Re: CH341a - Questions

            btw, happy new year

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              #21
              Re: CH341a - Questions

              Originally posted by stj View Post
              read the chip, then use the verify option - do it atleast 5 times.
              that will tell if it's reading o.k. - if not then it's probably a bad connection to the chip or adapter.
              Tanks for quick response, what i mean is that i was able to backup my bios bin before earasing and writing another bios i downloaded from the internet, but programming the verification faied which so that the bin mismartch with the bios. after that, i try to rewrite my backup bin but the verification still doesnt march . pls friends i need ur assistance cos my laptop is brink

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                #22
                Re: CH341a - Questions

                did you desolder the chip, or use a clip?

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                  #23
                  Re: CH341a - Questions

                  Originally posted by stj View Post
                  did you desolder the chip, or use a clip?
                  i desolderd the chip

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                    #24
                    Re: CH341a - Questions

                    and how many times did you read it - more than once i hope!
                    i think you need to start with a new chip - then we can see if the programmer is good.
                    btw, are you using a socket, or soldering the chip to a header every time?

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                      #25
                      Re: CH341a - Questions

                      thanks for reply, am scared its not my programmer cos i have to write another hp 655 bios which as also result to death of the pc. i have a black ch341a programmer pls help me out

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                        #26
                        Re: CH341a - Questions

                        well lets find out.
                        get a chip, and erase it.
                        then verify that it's erased.
                        then fill it with something - anything.
                        then verify it.

                        then repeat a few times.


                        now a quick lesson for everybody - and i mean everybody.

                        when you dump a chip, dump it atleast 3 times.
                        and if it's using a socket, take it out and put it back between each read.
                        then compare the files - if they dont match you have a bad dump - and a problem.

                        a simple way to compare files is to use a checksum program.
                        https://github.com/sunjw/fhash

                        just to add, the bigest problem with dumping/programming is a poor connection between the chip and programmer.
                        Last edited by stj; 01-03-2018, 02:16 PM.

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                          #27
                          Re: CH341a - Questions

                          Originally posted by stj View Post
                          (...)then compare the files - if they dont match you have a bad dump - and a problem. (...)
                          Recently I've experienced several annoying setbacks using the ‘CH341a - Black Edition' reading S25FL128:
                          - It simply refused to give consistent dump results!
                          After excluding several causes it came to my attention I had to doubt the programmer software.
                          Turns out that the version I was using, v1.30 (and version v1.29) was the problem.
                          Falling back to version v1.27 solve the problem (consecutive dumps were consistent and later dump contents were verified to be right).
                          .

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                            #28
                            Re: CH341a - Questions

                            i wouldnt know, i use 1.18
                            the hardware is now supported by "flashrom" btw,
                            so there is a total of 3 different softwares to use.
                            https://www.flashrom.org/Flashrom

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                              #29
                              Re: CH341a - Questions

                              Originally posted by sadecebel View Post
                              I tried to uptade the driver from chosen location, windows said that this driver not used for this device and I try old device modul from device manager to install the driver therefore windows says this driver can not suitable for amd64 driver I try all version of driver and/or all versiyon program packet (until version 1.31) nothing change ...
                              hi sadecebel, did you manage to solve the problem? same issue here

                              Comment


                                #30
                                Re: CH341a - Questions

                                Originally posted by stj View Post
                                the hardware is now supported by "flashrom" btw,
                                so there is a total of 3 different softwares to use.
                                https://www.flashrom.org/Flashrom
                                Thanks, i was unaware

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