gui won't write settings to witespy kv team minim osd

[Kevin Baker]

Hey guys,

I have gone through 2 minim osd's (both still assumed working, one never hooked to anything but witespy's ftdi), and I can read from it just fine using kvteam gui 2.2.  But when i change the settings and click write, nothing seems to happen and if i read again, it goes back to stock settings.  I also have a black screen through the unit when hooked up properly through mwc 5v power with digital and analog sections bridged via 2 solder blobs (the way witespy sells it), but i will address that after I can properly adjust the settings.  

I followed the setup guide, and it comes pre-flashed.  Everything looks good, and it will not write to either unit, and i have tried 2 different computers, both with all drivers needed, and the gui finds the com port just fine.

Any ideas? Thanks in advance.

[Markus Noll]

check your voltages the FTDI puts out, the ones i got from Paul were labeled and soldered wrong. Instead of 5V they only supplied 3.3V which will cause the problems with writing you describe. 

For the black screen, check the voltage the minim gets....i had the same effect when the board didn't get enough Volts

solution: move the bridge on the FTDI to the 3.3V pads...that should give you 5V and the board will be happy ;)

[Kevin Baker]

Thank you sooo much! The ftdi is in fact putting out 3.3v. The "bridge" looks kind of like a resistor or something, is it literally just a jumper and safe to move to the 3.3v side?

For black screen and lack of voltage, if I am in fact getting 5.03 ish volts from the multiwii, shouldn't that be enough? I'll check, I may not be getting that. If not should I use a bec or something to supply the voltage?

Thanks much,
Kevin Baker

[Markus Noll]

yeah, it is a resistor but with 0 ohm so you can bridge it with a solder blob or anything else

5 volts should be enough for a picture. For testing only connect the Vout to a screen and hook up the FTDI. That should give you just the OSD display on a grey backround

[Kevin Baker]

Thanks so much, I used all your suggestions, and they all worked. Just pulled 5 for power off a bec, and got the ftdi working. I ended up having to use pal as well to get it to work in the end, as it was simply not happy with ntsc off my fat shark 600tvl. Now I just need to figure out getting rssi off my x8r receiver and getting the battery voltage setup figured out.

Thanks again, I really appreciate the replies.

[Abe]

Hi guys, not sure if this is still an active thread since these posts are about 2 years old now. But I'm experiencing the same issues Kevin has been describing with my board. Does the mini minimOSD require just over 5 volts? I checked the voltage and I'm distributing 4.7-4.8 V to my board and experiencing the same issues unfortunately.

any advice would be helpful as its been about a week or so that I've been trying to dig up info on this.

Thanks!

[Kevin Baker]

Abe,

My buddy just recently figured it out... the dtr pin is in fact needed with the micro minim. So i just used my ftdi from rtfquads, included the dtr pin in the mix, and sure enough, the thing flashed just fine. I think it did still give an error or took longer than expected, but it did flash. Hopefully you had not been using the dtr pin and this solves it for you.

See mine in action! https://youtu.be/6qkW5uRbXaE

[Kevin Baker]

Abe, what i just posted was about recento troubles. Make sure you are using dtr pin first, then if still no joy, supply 5v from another source, and between those 2 things, you should get it. Some people say you have to use an older version of the arduino software... I think i used the latest.