Question about USB

[Mmarsh]

Hi Xavier -

I have a question about USB. When I plug the FM2 into my iMac it id not recognized as a MIDI device.  Should it be? It's also not recognized on my PC.

One more: should the USB stick be visible to the Mac or PC as a drive? It would be convenient to have it work this way so that I don't have to partially dissasemble the case to get the USB stick out.

Thanks!

Mike

[Xavier]

Hi Mike,

Your PreenFM2 should be recognized as a "PreenFM mk2" midi device on both mac an PC (and Linux and IOS).

First, Midi USB is disable by default and must be enable menu->Tools->Set->Usb Midi.

If it's still no recognized check with an aditional mini usb cable that you can plug between your computer and directly to the mini usb port of the CERB40.
If it works with this direct cable and not with the PCB->mini usb cable you built, then check the connection of the USB cable.

Making the USB stick visible from the computer is not easy at all as they are 2 different USB connection for the CERB40.
Don't forget that you can use sysex to upgrade firmware.
But I agree it would be better to see the USB stick from the computer.

Xavier

[Mmarsh]

Ah, I didn't know about the menu setting! Thank you!

Mike

[Xavier]

One more: should the USB stick be visible to the Mac or PC as a drive? It would be convenient to have it work this way so that I don't have to partially dissasemble the case to get the USB stick out.

Implemented in bootloader 1.10. 

Xavier

[Mmarsh]

Oh, excellent Xavier! And happy new yer to you and your family

[Xavier]

Thanks, happy new year to you too 

[dimifrag]

Instructions to how can read/write usb storage from my mac ?

[6581punk]

Hold a key when turning on the Preen to go into the booloader, then there's an option to mount the USB stick.

[Xavier]

Thanks 6581punk for the answer 
I would just add that bootloader 1.10 is required.

To know what version you have just keep "OP" pressed while turning on the Preen (works with all version)

Xavier

[dimifrag]

how can i upgrade the boot loader because i have the 1.02 ?
i can't see the option for the usb! 

[6581punk]

You have to stick a jumper on JMP3 and power up the preen, then use dfu-util.

dfu-util -a0 -d 0×0483:0xdf11 -D p2_boot_1.10.bin -R -s 0×8000000

[Xavier]

More details here :
http://ixox.fr/preenfm2/built-it/burn-firmware/

1.10 will hopefully be the last one you need ;-)

Xavier

[dimifrag]

and put out the jump 2 and 3 ?
because the terminal write can't find the file!

[dimifrag]

sorry the 1 and 2?

[dimifrag]

I TAKE THIS MESSAGE:
dfu-util 0.7

Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2012 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org

Filter on vendor = 0x0483 product = 0xdf11
Opening DFU capable USB device... ID 0483:df11
Run-time device DFU version 011a
Found DFU: [0483:df11] devnum=0, cfg=1, intf=0, alt=0, name="@Internal Flash  /0x08000000/04*016Kg,01*064Kg,07*128Kg"
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 2048
p2_boot_1.10.bin: No such file or directory