Recent Posts

21

preenfm2 and preenfm3 / Re: PFM3 not booting unless I press reset button on bottom of PCB [Solved]

« Last post by matrix12x on February 24, 2024, 06:01:34 PM »

I think it's solved.

ahh, I'm wondering if a jumper fell off those pins. looking at the build docs, those 2 right most pins should have a jumper. My PCB does not have this legend on the silkscreen.

https://github.com/Ixox/preenfm3/wiki/build/pfm3_back.jpg
 

22

preenfm2 and preenfm3 / Re: filtering USB +5V line

« Last post by matrix12x on February 23, 2024, 10:31:59 PM »

So while I had my PFM3 open for the booting issues I had, I decided to try out filtering the USB lines using the circuit from the link above.

it helps so much when operating from USB. The digital whine I would get when powering via USB is now inaudible. I'm very happy with this solution.

I probably should have measured the pre and post filter noise on my scope for completeness.

Of note, I was previously trying out a ferrite on the USB cable and it was not helpful for the USB induced noises I was hearing.

23

preenfm2 and preenfm3 / Re: PFM3 not booting unless I press reset button on bottom of PCB

« Last post by matrix12x on February 23, 2024, 09:04:51 PM »

"first obvious thing would be to downgrade to the "official" firmware again and see if it works there"
I just tried putting P3_1.02 and have the same issue. (good point thought) I kind of figured it was not the VOSIM OS. I'm wondering what type of hardware issue might cause this.


"Can you enter the bootloader mode with pressing the Menu button on power up?"
Not on initial power up (I.e. plugging in the DC power). I have to hit the reset button first (and hold menu or whatever) to get to boot loader.

So if I plug in power and I don't hit the reset button the screen stays black and the red led next to the microprocessor never blinks. The blue led and yellow LED stay lit.

[edit] new datapoint, I went to do the DFU style boot loader update where you tie boot0 pins with vcc on back side of the main PCB. I jumpered the right most two boot0 pins and powered on by connecting the DC power... and now everything is working normally.....
To be clear, I did not update in DFU mode yet, just jumpered those 2 pins and plugged in power and it consistently boots fine. Super weird.

24

preenfm2 and preenfm3 / Re: How to save mixer setting as default

« Last post by Toltekradiation on February 23, 2024, 06:31:34 PM »

Save your mixer as the default mixer 
Menu>Mixer>Defl>Save

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preenfm2 and preenfm3 / Re: Released an EP featuring a bunch of PreenFM2

« Last post by Toltekradiation on February 23, 2024, 06:28:37 PM »

cool, thanks for posting !

26

preenfm2 and preenfm3 / Re: PFM3 not booting unless I press reset button on bottom of PCB

« Last post by Toltekradiation on February 23, 2024, 06:24:31 PM »

yes, as Lokki said, try the official firmware, but i would be surprised if it was that as i never encounter such issue while coding.
Can you enter the bootloader mode with pressing the Menu button on power up ?

27

preenfm2 and preenfm3 / Re: PFM3 not booting unless I press reset button on bottom of PCB

« Last post by lokki on February 23, 2024, 05:23:02 PM »

first obvious thing would be to downgrade to the "official" firmware again and see if it works there

28

preenfm2 and preenfm3 / PFM3 not booting unless I press reset button on bottom of PCB

« Last post by matrix12x on February 23, 2024, 01:45:03 AM »

I recently updated to VOSIM 3 and my PFM3 is not booting unless I press reset button on bottom of PCB.


It may not be VOSIM that is causing this issue. It seemed to be fine after the update, but this not booting thing seems to be happening today.

Any thing I should try out to narrow down the issue?


I'm powering over USB and its the USB power source I always use.
[edit] I used an external power supply also and had exactly the same issue.

29

preenfm2 and preenfm3 / Released an EP featuring a bunch of PreenFM2

« Last post by thejewk on February 20, 2024, 07:44:12 PM »

https://braneunderscore.bandcamp.com/album/1

Got my PreenFM2 last year and I've been putting it to good use.  Here's my minimal techno EP where it's used on every track to some extent.

30

preenfm2 and preenfm3 / How to save mixer setting as default

« Last post by Seteef on February 20, 2024, 07:43:54 AM »

Hi there,

I'm trying to figure out how I can have my preenfm3 start up with a mixer page that I save, so that it is only responding to midi channel 1 (for example).
Here's what I'm trying to accomplish:
I use the preen with my Hapax sequencer, but whenever I change to my instrument that is on midi channel 2, the preen plays the instrument on midi channel 2.
I can change this manually in the mixer page, but I'd like to have it start up with a mixer page by default that only uses one midi channel.
I can't for the life of me figure out how to save the mixer settings to do this. The documentation doesn't seem to mention this, and I can't really figure out how the mixer settings I save in the menu page effect the init mixers settings that are there when I turn on the preen.
Does this make sense?
Thanks!