PreenFM > preenfm2 and preenfm3

[solved] PreenFM2 r6 no boot after build

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Blaise:
Hi ! :)

I just finished my preenfm2 r6 build from van daal electronics, and when i power it, it does nothing. No audio, not even noises or cracks, and the OLED stays black.


--- Quote ---Latest beta version : 2.20b1

If you have a PCB R6 SMD, you need this version to get any sound out of the preenfm2.
If you flash the PCB for the first time, please follow the steps here :
https://github.com/Ixox/preenfm2/tree/master/flash
And use the dfu file attached to the release.
--- End quote ---

Do I need to do this or is my PCB already flashed to the latest version ?

Cant wait to hear the synth :)
Ty

Xavier:

Hi,

2 possibilities.
1. You put a jumper on Boot0 on the PCB
2. The firmware is not flashed

If the answer to 1 is "No", so you have to follow the steps you mentioned to flash bootlaoder and firmware.
But don't use 2.20b1. It was the first one that support the new DAC, use 2.21 instead :
https://github.com/Ixox/preenfm2/releases

Blaise:
Ok so now every cell in the screen is lit when i power it normally, but if I hold a button i can access bootloader v1.11.

I guess next step is to install the firmware ?

I've been following these instructions : http://ixox.fr/preenfm2/preenfm/upgrade-firmware/

On my USB key there's a single folder called "pfm2" with DX7, scala folders and some .bnk files. And also a p2_2.12.bin file.
But when i press the flash button in bootloader mode it doesnt show any option.
Also i cant see my usb stick after pressing ENG in bootloader mode

As you mentioned the latest firmware is 2.21, i've downloaded the pfm2_2.21.zip from your github and copied it at the root of my USB key, but pressing flash still doesnt show any files on the synth.

Thank you for your time :)

matrix12x:
Sounds like a USB stick issue. You may want to try a different USB stick.

Blaise:
Just to be sure i updated to bootloader 1.13 from the version 2.20 folder, and i tried to install firmware v2.21 with a different USB stick. It looks like it worked, but not totally.

Now when i power the synth normally it doesnt boot. I have to start it in bootloader mode, press the flash button, screen says "no /pfm2 folder, rebooting" and after reboot it works perfectly.
Also it looks like the synth is running 2.20, but im sure i put the p2_2.21.bin file in the /pfm2 folder on the USB key.

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