[Fixed] Flashing the Bootloader in a Mac with Mavericks

[Xavier]

1. & 2. Correct

Sub menu, if I press the following buttons, screen reads as follows

Eng: Bootloade v1.10 (USB drive not visible on PC)
OP1: USB Upgrade (but nothing further happens)
OP2: Sysex Upgrade, Erase firmware (it formats if I press erase, seems to accept the sysex message, but on reboot - no change, still blank screen)
MTX: !STM32F4 USB DFU!

Maybe you were right when you suggested to reformat your USB drive.
All this problems can be because of a USB stick the PreenFM cannot read.

If reformating don't do anything, please try another USB drive.

If that does not fix anything, we'll try something else.

[squirts]

ok I've formatted the USB, but the same happens. For what it's worth, the USB behaves normally on both my mac and PC. The good news is that I've now managed to get boot loader 1.02 back on and have also got firmware 0.9 back on... So I have a working preenFM again (woohoo).

So, maybe I can start again using PC for DFU to get 1.10 back on? Or can I skip DFU entirely?

[squirts]

OK, so i re-flash bootloader 1.10, and now it keeps firmware 0.9... but when I try to upgrade firmware via USB to 1B3o, no joy. Same with sysex upgrade.

 

[Xavier]

Aouch.... you're hard to follow.

1.02 / 0.9 : everything works ? even flashing a new firmware from bootloader using USB stick... *.bin must be in /pfm2.

> "OK, so i re-flash bootloader 1.10, and now it keeps firmware 0.9..."
I don't get it.

[squirts]

OK sorry for the confusion

after i managed to get 1.02/09 working, I upgraded boot loader to 1.10 via DFU.

This worked, & for the 1st time I had functional preen with 1.10 & FW 09.

But that's where progress stopped, I still cannot see USB on PC when I press Eng.
And I can't upgrade FW to 1B3 either by USB (just hangs with "USB UPGRADE" message) or Sysex (receives sysex, asks me to reboot, blank screen again)

[Xavier]

Coud you tell me if you can upgrade FW by USB drive (switch on + Op) with 1.02 bootloader ? That would be helpfull.


Then i would suggest you to erase your browser cache and download again 1.B3.

Then flash both bootloader AND firmware via DFU.
What happens ?
. bootloader work ?
. fiwmare boots ?

[squirts]

Yep... with 1.02 BL, upgrade by USB works fine.

To make sure i'm not misunderstanding, you would like me to add FW 1B3 manually to the USB, reinsert USB, then upgrade by powering up & pressing Op

[Xavier]

Yep... with 1.02 BL, upgrade by USB works fine.
To make sure i'm not misunderstanding, you would like me to add FW 1B3 manually to the USB, reinsert USB, then upgrade by powering up & pressing Op

Yes i'd like to know if the problem (accessing the USB stick) you have with bootloader 1.10 did not exist in 1.02.

[squirts]

So i switched back to 1.02 BL, and on my USB are 2 FW 0.9io & 1B3o.

If I USB install 1B3 & reboot, I get blue screen.
If I install 0.9i, all good.

[Xavier]

Great... Thanks for all this tests 

Now 2 possibilities left :
1 - You got a corrupted 1.B3 bin....
2 - I changed something in the USB stack that your Usb Drive does not like.


To be sure it's not 1, can you download it again (after haveing cleared you browser cache) ?

Have you  tried the last 0.9p firmware ?
https://dl.dropboxusercontent.com/u/41654198/preenfm2/firmwares/pfm2_0.9p.zip

I'd like to know the last firmware that works for you.

Thanks

[squirts]

1. emptied cache, dloaded again, no joy
2. tried the following:0.9po, 0.9oo, 0.9no, 0.9io

only version "i" will load

[Xavier]

Thanks again for all these tests.

Seems to be my fault 
I'll investigate that.

[squirts]

Cool, no worries. Let me know when you need me to test again

By the way, is there a recommended USB stick I should try? Might be a quicker solution. I just want to get your new FW, the new features look great

[Xavier]

Cool, no worries. Let me know when you need me to test again
By the way, is there a recommended USB stick I should try? Might be a quicker solution. I just want to get your new FW, the new features look great

Sandisk cruzer blade (4Gb) is cheap, small, fast (for the PreenFM) and works fine.
http://www.amazon.fr/gp/product/B002U213Y8

[squirts]

ok, just ordered one, will report back when it arrives