Thumbs up for the guys at minidso.com/bbs/read.php?tid=301.
As I said, the v4.20 did not work; I will try the others tonight.
Finally it works !
My DSO nano v3 is back to its original firmware, and I was able to save a hard copy to that 2Mb chip and retrieve it on the computer.
FYI : I’ve been using the following files
- 201_L228.hex
- 201AP264.hex
- DS201V4.hex, which is firmware v4.00
Tried also firmware v4.11 and v4.20, but both freeze on startup and the Nano doesn’t boot up. Just in case anyone needs these files, too, I’m attaching them to this post.
Just to avoid further problems as more v3s will ship, maybe a sticky warning post stating that they should NOT update to BenF firmware, and if they do, they need to revert to the v4.00 firmware may help.
DSO Nano v3 Firmware v4.00.zip (88.5 KB)
I wish I had the source for the latest BenF, I could probably make it work, but the latest source is too old for me to bother. I don’t see any way the SD card slot could permanently brick it, either. Still like 50/50 on whether it will be recognized though. 
Just to elaborate on your statement though, you CAN flash BenF, but not if you want to save waveforms/screenshots.
Right… After Stefanu123’s success with miniDSO forum, I thought I would also try and ask for layout and schematic details if available…
http://www.minidso.com/bbs/read.php?tid=304
In short the answer is:
I hope that this can clear up the setup of the flash chip, and if it is possible for people to easily replace it with a card reader.
Lets see next week…ish
Just had a look at the pics again and compared it to the M25PE16 data sheet. The two traces that are visibly shared between the cardslot pads and the flash chip are 6 and 5(on the flash chip), which are Serial Clock and Serial Data Input, respectively. They connect to 3 and 5 on the card slot pads, which are listed as Serial Clock and Serial Data Input for SPI mode, which seems to work in the same serial paged manner. Long story short, the flash chip and the card slot seem to be accessed in the same way, and still be wired correctly for both pin diagrams(both flash chip and card slot).
Upside is the card slot should work in the same manner as the flash chip, downside is you definitely have to pull the flash chip off the board while you’re trying the cardslot, or it will be paging two devices on the same channel, and neither will work.
For me it’s ok as it is right now; guess I’ll use the micro SD slots for other projects…
Made a simple calculation. One hard copy of the signal is 38Kb, which will allow me to save some 50 images to that flash chip, which is more than enough.
If you can stand the firmware, more power to ya. I don’t think I could move away from BenF after using it, with or without waveform saving. It just works so much better. As a point of interest, did they ever add 3-stage acquisition to the stock FW?
I already have a hard time with the original firmware (already posted a “stupid” question).
I managed to receive a V3 which looks exactly like the one pictured on the website, but cannot get it to read/write to the sdcard. There appears to be no internal storage. I’ve tried all of the firmwares posted in this thread and am getting pretty frustrated with it.
Dear friends,
Unfortunately DSO nano V3 with Internal memory(without SDCARD slot) will not support by BenF firmware as soon as.
Can someone clarify something for me? We can use the BenF firmware on the v3 (without SD slot), but will not be able to use the internal 2Mb storage correct?
Yes, it seems correct. Can’t tell which other functions do not work, but I can say for sure saving to that storage doesn’t.