1v test signal fails

[veepee78]

hi

calibrated 0.1v succesfully, but when I switch to 1v, signal behaves weirdly. Signal disappears or it's way too high, I'll have to scroll long time to the bottom. It's behaves like it's too sensitive. When I see the bottom, c6 doesn't do anything to it. Though it looks sharp already. Any tips what to check for that?

And thanks for fun kit!

[bobydunkel]

Try 060 firmware. You have option to auto center trace.

Best regards,
boby

[veepee78]

thanks for the tip, didn't notice new firmware earlier.

Tried to install new firmware, I was not able to connect. Tried also to different baud rates but I did not get any response from board. I happen to have another stm chip that I tried to connect and it connected immediately.

So any tips to solve connection problems..? Uart pins are good solder, as are jp1 and jp2. Display stays white when powering on.

[bobydunkel]

Connect RX -> TX , and TX -> RX , GND -> GND

I used PL2303 , USB to Serial, Windows 10 driver, older driver 3.3.3.114

Best regards,
boby

[veepee78]

It was connected like that. I used ftdi usb adapter.

[bobydunkel]

It was connected like that. I used ftdi usb adapter.

FTDI has some drivers issue with "counterfeited" FTDI chips. Are you sure you have original FTDI chip ?

If you have non original chip and use new FTDI drivers , FTDI chip is usless after that. You have to reflash it.


Best regards,
boby

[veepee78]

I'm not sure about the origin, but as I said it worked just fine with another device (storm32) that has stm chip..

[bobydunkel]

I'm not sure about the origin, but as I said it worked just fine with another device (storm32) that has stm chip..

Then according to this : http://www.olliw.eu/storm32bgc-wiki/How ... h_firmware

You can't use that adapter to update DSO138

Find another adapter...

Best regards,
boby

[dunk8888]

my pl2302 worked fine to update the ds0138

[veepee78]

I have ordered pl2303, let's see if that makes a difference. Might take a while..