Messages

1876

preenfm2 and preenfm3 / Re: PreenFM2 USB issues.. (Windows 7 / 64bit)

« on: January 07, 2014, 11:45:51 AM »

Yes the usb cable is the most sensitive part to build.
I would love a CERB40 with 2 aditional pins instead of the mini usb connector.

Thanks for the feedback, i'll add the D+, D- information somewhere.

Xavier

1877

preenfm2 and preenfm3 / Re: Display doesnt work

« on: January 07, 2014, 11:44:19 AM »

Aouch... 

Here is a LCD wiring schema.

green = GND
red = 5V
dark grey/blue = variable resistor output, LCD contrast

I think what you think is #12 is actually #13.

Xavier

1878

preenfm2 and preenfm3 / Re: TubBells DX7 Patch demo

« on: January 05, 2014, 11:25:10 PM »

I had to implement all DX7 algos to be able to read the preset. PreenFM algo from 10 to 27 are the same as the 32 DX7 algos.
DX7 algos can be different only because of the place of the feedback (See attached picture).
As the PreenFM2 does'nt have feedback it needs less algo. High feedback value can be simulated by selecting a different waveform of the operator.

What i'll try to do is to have the presets sounding better (not closer the DX7), at least by removing the digital noise that occure in too many presets...

Bad sounding DX7 preset can often be solved by manually decreasing modulation indexes and frequency of the oscilators in the highest positioned operator. Press ENG + MENU to have a quick look at the algo. Operator 5 & 6 are often guilty.
Reseting "fine tune" in the oscillator can also help.

Keep in mind that many presets use corner case or even bug of the DX7 to sound as they do. I learnt that by studying Hexter code (http://dssi.sourceforge.net/hexter.html)
The PreenFM2 will never be able to emulate that

Xavier

1879

preenfm2 and preenfm3 / Re: MIDI Sustain Pedal?

« on: January 05, 2014, 02:11:45 PM »

I hope it's OK now in 0.9o.

Xavier

1880

preenfm2 and preenfm3 / Re: Color Tests

« on: January 04, 2014, 09:05:41 PM »

Nice and interesting thread... thanks a lot for sharing :-)
I like a lot the rainbow ones... unique !

Xavier

1881

preenfm2 and preenfm3 / Re: Help

« on: January 04, 2014, 12:18:26 PM »

Hi Tenchi,

Here are all the LCD connections.
Please check them all.

(Sorry i changed the color signification since last picture).
Check green point are linked together and to the ground.
Check red ones are 5V.
And that the grey/blue one (LCD pin 3) change when you turn the variable contrast resistor.

Then your multimeter into shortcut detector.
Check every orange connection from the CERB40 pins to the LCD pins on the other side.

And let me know the result,

Xavier

1882

preenfm2 and preenfm3 / Re: [Fixed] Flashing the Bootloader in a Mac with Mavericks

« on: January 04, 2014, 10:49:15 AM »

Yep - success! Worked for me too. After installing Xcode 3.2.6 and fiddling with the commands it finally worked. Thanks! :-)

Great.. 
Thanks for the feedback... I have no idea why xcode is required.
Do you remember the result of "dfu-util -l" before installing xcode ?

1883

preenfm2 and preenfm3 / Re: Flashing the Bootloader in a Mac with Mavericks

« on: January 03, 2014, 06:33:18 PM »

Oh yeah !!!!! 

1884

preenfm2 and preenfm3 / Re: Flashing the Bootloader in a Mac with Mavericks

« on: January 03, 2014, 06:22:42 PM »

Congrats it's done 

To enter bootloader, you must press one of the button while powering on the PreenFM.
Release the button when you see "BootLoader v1.10" on the LCD.
You have then several  choices :

1. Press "Eng"  and your USB stick will appear on your computer after a couple of second.
You can then copy the future firmware on the USB stick that way (copy them in the '/pfm2/' firmware).

2. Press 'Op' and you can select one of the firmware from the USB stick to flash.

So you won't have never agin to fight with dfu-util :-)


Xavier

1885

preenfm2 and preenfm3 / Re: Flashing the Bootloader in a Mac with Mavericks

« on: January 03, 2014, 05:59:03 PM »

The link to the last firmware is at the top right of this page.
Direct download to the last firmware :
https://dl.dropboxusercontent.com/u/41654198/preenfm2/firmwares/pfm2_0.9n.zip
Unzip the file.

In the terminal, move to the directory where you extracted the files (using cd command).
Run the dfu-util commands from this directory.

Xavier

1886

preenfm2 and preenfm3 / Re: Flashing the Bootloader in a Mac with Mavericks

« on: January 03, 2014, 05:45:00 PM »

Good... One step furhter ;-)

When your PreenFM is visible in DFU mode with 'dfu-util -l'
You just have to copy and past the content of the cmd iles in your terminal.

Or copy the following :

Code: [Select]

dfu-util -a0 -d 0x0483:0xdf11 -D p2_boot_1.10.bin -R -s 0x8000000for the bootloader...

And :

Code: [Select]

dfu-util -a0 -d 0x0483:0xdf11 -D p2_09no.bin -R -s 0x8040000for the firmware.

Xavier

1887

preenfm2 and preenfm3 / Re: Help

« on: January 03, 2014, 03:25:00 PM »

Also, did you remove JMP3?
Once flashed you remove that jumper so it boots as normal.

Yes, he did that right, he has the midi and audio working.
That really is a LCD problem only now.

Xavier

1888

preenfm2 and preenfm3 / Re: Flashing the Bootloader in a Mac with Mavericks

« on: January 03, 2014, 03:23:08 PM »

I don´t see the orange led flashing

Normal because you used the JMP3 solution. The PreenFM2 direcly entered DFU mode.

and the dfu-util does not list the device when I perform the dfu-util -l command. Nor does it perform the boot loader update with the command described in the instructions because it says there is no dfu device.
Any pointers as to where to go from here?

Be sure your dfu-util version is at least 0.6.
If dfu-util does not see your device, it can be a problem from your internal PCB->CERB40 cable.

To know if your cable is OK, let me know if you have midi over usb working ? (must be enable in the setup).

1889

preenfm2 and preenfm3 / Re: PCB Only/BOM problem reports

« on: January 03, 2014, 01:30:58 PM »

If they were in the Kits they are OK ;-)

The last digits are maybe the date : <Year><week number>.

Xavoer

1890

preenfm2 and preenfm3 / Re: Help

« on: January 03, 2014, 01:25:59 PM »

I just noticed you didn't install last bootloader and firmware.

You should install them.
Specially the bootloader 1.10, that makes firmware from USB Stick possible without opening the PreenFM2.

Xavier