cerb40 flashing

[solipsvs]

gnu monks is down.  trying to flash my cerb40.  anyone have the files i need for winxp?

[solipsvs]

ok i got dfu-util and command line utils from apple installed.  im stumped.  i think im supposed to have a directory on the thumb drive called pfm2 with the bootloader and firmware in it and when i try to CD over to that folder it says no such directory. 

i can also hook up USB to the cerb40 and flash directly right?  how do i do that?  i need it spelled out my apologies but i just dont ever do this or anything remotely similar...  the instructions are like french to me.  no pun intended.  well ok pun intended  .  i only speak english

when i plugged the unit into my xp machine it wanted a driver so that means it works right?

also, when i plug usb or 9v power into the unit and the jmp3 is not closed, the LED lights light up dimly.  is this a bad sign?  the screen has never come on once yet.  i wish there was another indication that something was working.

[Xavier]

Hi,

Please try to make it clear... you're hard to follow . 
You read this page right ?
http://ixox.fr/preenfm2/build-it/burn-firmware/
Looks like dfu-util moved to http://dfu-util.sourceforge.net/
I just updated the page with correct links.

ok i got dfu-util and command line utils from apple installed.  im stumped.  i think im supposed to have a directory on the thumb drive called pfm2 with the bootloader and firmware in it and when i try to CD over to that folder it says no such directory. 

OK so you flashed it with the dfu-util command ? 
Did 'dfu-util -l' list any device ?
Did the dfu-util show a progress bar while flashing ?
You flashed both firmware and bootlader ?

i can also hook up USB to the cerb40 and flash directly right?  how do i do that?  i need it spelled out my apologies but i just dont ever do this or anything remotely similar...  the instructions are like french to me.  no pun intended.  well ok pun intended  .  i only speak english

When flashing the CERB40 for the first time, you don't have any choice.
Put on JMP3 and plug the CERB40 directly to your computer with a mini-USB cable....

when i plugged the unit into my xp machine it wanted a driver so that means it works right?

I would say that's rather a good sign.

also, when i plug usb or 9v power into the unit and the jmp3 is not closed, the LED lights light up dimly.  is this a bad sign?  the screen has never come on once yet.  i wish there was another indication that something was working.

Yes if it makes some sounds, it works 
Do you hear a small pop when switching on ?
Any picture of your PCB both side, to see if anything is OK with the Display.... What display do you use ?

Xavier

[solipsvs]

display is OLED

nothing has been flashed.  i need step by step instructions.

2. MacOS X

dfu-util is available from MacPort or brews.

MacPort : Install MacPort. With Macport install dfu-util and you’re ready to run the dfu-util command.

Breaws : run the installation command at the bootom of the brews home page… Then ‘brews install dfu-util’.

Boot microcontroller in DFU mode.

    Have you preenFM unpluged
    Shortcut the Jmp3 connection.
    Power up with the USB connector
    Nothing on the LCD is normal. The STM32F4 is in DFU mode.

Downlad the last PreenFM2 firmwares from the download page.

Then  goto 4 to run the commands.

it says download firmware...  but to where?

dfu-util -l lists UNKNOWN, @Device Feature, @OTP Memory, @Option Bytes, @Internal Flash

so im sorry, did you say you need to directly hook up the cerb40 to the computer from its USB port?  ok did that.  still when i run "dfu-util -a0 -d 0x0483:0xdf11 -D p2_boot_1.10.bin -R -s 0x8000000" it says "could not open file p2_boot_1.10.bin for reading:  No such file or directory"

what format does the thumb drive need?  fat32 or fat16?

also, should these files be in /pfm2/ or some other direcory?

thanks

[solipsvs]

ok im about to look kinda stupid here (again?) and ask:  bootloader...  does it reside on the computer or the cerb40?  bootloader is what i need to load the firmware?  i know the firmware resides on the cerb40.  bootloader is what looks for firmware in /pfm2? 

when i run "dfu-util -a0 -d 0x0483:0xdf11 -D p2_boot_1.10.bin -R -s 0x8000000" it says "could not open file p2_boot_1.10.bin for reading:  No such file or directory"  is this because the cerb40 cant find the thumb drive?

[solipsvs]

looking at my soldering close up i see it looks sloppy haha can you tell its my first?

[Xavier]

You flash the firmware and bootlader from your computer to the CERB40... the USB drive has nothing to do at this point. The USB drive can be accessed by the CERB40 when the bootloader and firmware are flashed.

when i run "dfu-util -a0 -d 0x0483:0xdf11 -D p2_boot_1.10.bin -R -s 0x8000000" it says "could not open file p2_boot_1.10.bin for reading:  No such file or directory"  is this because the cerb40 cant find the thumb drive?

OK... here your computer (which runs the dfu-util command) cannot find the bootloader you're trying to flash.
I assume you downloaded a zip file... "pfm2_1.06.zip" ?
Where is it ? in your "Download" folder ? You have to unzip it...

Here is an exemple of command list you should enter :
> cd
> cd Downloads
> unzip pfm2_1.06.zip
> cd build
> ls p2_boot_1.11.bin
[Check you don't have error and that your bootloader is in the current directory]
> dfu-util -a0 -d 0x0483:0xdf11 -D p2_boot_1.11.bin -s 0x8000000
.....
> dfu-util -a0 -d 0x0483:0xdf11 -D p2_106o.bin -s 0x8040000
.....


Once both booloader and firmware are flashed.. Unplug the preenfm2, remove JM3 and plug it back.
You screen should not be black anymore.

Let me know,

Xavier

[Xavier]

Just noticed that... Those 2 pins are not connected ? Right ?
(They must not).

[solipsvs]

ok that worked.  thank you!

i now have a screen that says '2'

tuned it off and on again and this is what the screen shows



off and on again and it shows nothing on the screen

what next?

[solipsvs]

now when i plug it in the LEDs flash but nothing on the screen.

[solipsvs]

ok i got it to do this:

looks korean or something

[solipsvs]

ok seems like nonsense on the screen now.  its never the same.

[Xavier]

ok seems like nonsense on the screen now.  its never the same.

This happens when there are soldering problems with the screen.
Check the soldering points on your 16 pins header on the PCB and on the header on the OLED.

[solipsvs]

doh!  i figured it was something like this.  can you tell im a soldering pro? 

[lokki]

just to bring this up since i had the same problem...

it does not have to be bad soldering. if you have hooked up the preenfm2 to a usb port for power, try a different computer.

when i had hooked up my preenfm2 to a macbook air, i got flaky display issues (writing from right to left, only row one and three, nothing, scrolling text all over the display...) i soldered headers again and checked continuity with the multimeter. the issue stayed. at one point i switched the usb connector to my macbook pro, and voila! it worked perfectly! seems the macbook air had not enough "current" for the preenfm2....