I have a G120 module on a custom board and earlier today the G120 module lost all the application and seemingly too, the firmware and would only boot as a serial port device.
I am using Tera Term to reprogramme Tinybooter but I get a FileTransfer Finished Successfully and the BL Is shown in the output window. The online docs indicate that this is an error.
No matter how many times I try to update Tinybooter it will not work.
This was the same file I used the other day to update the same module.
@ Dave McLaughlin
I had almost the same issue as you. Before replacing the G120 module I decided to try and replace only the serial flash. For some odd reason after replacing the serial flash I was able to update the same module. If you have another G120 that you can take the serial flash from I think you should give it a try, much easier than replacing the module.
The SOIC-8 package is pretty simple to replace with a descent soldering iron.
I am wondering if the load spike I had today may have taken out the memory IC on the board. I found small design fault where the LCD casing may short out the supply which is now fixed.
I see that there is a serial flash device on the board that could potentially be replace if this was the one at fault.
Is there any commands I can issue at the bootloader to check anything?
Just what I asked and you where posting before I finished. I’ll order up a replacement on Monday as I have found a supplier who has the same part number. At least I think it is.
@ Dave - I also have 2 or 3 G120 modules on custom boards that are exhibiting the exact same symptoms – namely “BL” always showing up immediately after transferring the bootloader file. So you’re definitely not alone. The other boards in the same batch are fine and update normally. So there’s definitely something different about some of them. I might give the serial flash replacement a try.
Hello, I have the same problem with G120HDR. I tried to update the firmware with TerraTerm i’t looked finished but didn’t worked. After the R command it answered Bad firmware for B 921600? . Has any solution for this problem?