PanelDue 7i bricked

dc42

It should be sufficient to power the 7i (either from the Duet or from USB - as long as the USB port can supply enough power), press Erase and hold it for at least half a second, release it, then press Reset. Then the Bossa port shold appear on the PC. Some laptop computers might not be able to supply enough USB power for a 7i with the backlight running.

grizewald

I would suspect that the USB cable you are using is a 'charge only' cable.

Try connecting some other USB device which you know is working using the USB cable you are using. If the device does not appear in the operating system then you have a charge only cable.

It wouldn't be the first time I've been caught out by that, so now, all my charge only cables have a label warning that they are such.

tkamsker

Hello thank you for that hint
i am now retrying that procedure with an cable sure knwowing for working as serial cable. This was an very good input which i didn't consider thank you best reg thomas

grizewald

@tkamsker I hope it solves your problem! I've updated my 7i panel several times now and it's a painless process. I just followed the normal sequence of "erase", "reset", "run bossac".

The other thing is the current limit which dc42 mentioned. I use a USB3 port to update the panel's firmware as the USB3 standard specifies that a minimum of 900mA must be available for a device. That's more than enough to drive even the big 7 inch panel.

tkamsker

Hi
unfortunately it didn't work i have a macbook pro and use that port to power an raspberry with octopi
so i did take that cable from octopi to printer which should do serial ;).
But no luck not on windows and osx ,..
any hints ?

oliof

On Linux it is very fiddly to get the bossa device to reply to serial because of the way it wants the serial connection set up, maybe the same issue applies to macOS. On Windows it should work if you have the right drivers installed.

What is the version of bossa you are using? Make sure it is the latest one.

tkamsker

Hi
i now tried Windows 10 on the dual boot of the macbook pro (it is an USB3 ) and on an Windows 7 machine also an notebook the backlit lights but no serial shows off.
Si in my experience (Mesa cards , etc ) there is normally a way to connect an Serial/usb to TTL converter an i can see th pins on the board question is how do i get the code on the board ?
if anyone has some hint then i can overcome the USB issue and i have now the E3D Dual tool changer machine ready only the 7i is waiting ,..
and i have the issue that wile printing the Webserver is not responding so i hope that i can see on the panel how the machine is behaving ,.. right ?

grizewald

@oliof said in PanelDue 7i bricked:

On Linux it is very fiddly to get the bossa device to reply to serial because of the way it wants the serial connection set up

???

I'm using Linux and as long as your user is a member of the correct groups so that you have access to the serial device, there is no setup to do.

grizewald

@tkamsker said in PanelDue 7i bricked:

Hi
i now tried Windows 10 on the dual boot of the macbook pro (it is an USB3 ) and on an Windows 7 machine also an notebook the backlit lights but no serial shows off.
Si in my experience (Mesa cards , etc ) there is normally a way to connect an Serial/usb to TTL converter an i can see th pins on the board question is how do i get the code on the board ?
if anyone has some hint then i can overcome the USB issue and i have now the E3D Dual tool changer machine ready only the 7i is waiting ,..
and i have the issue that wile printing the Webserver is not responding so i hope that i can see on the panel how the machine is behaving ,.. right ?

You are disconnecting the panel from the Duet board first right?

When I update my panel, I remove the four pin connector that goes to the printer before attempting to update it.

tkamsker

hi yes of course the panel is in an mounting box to ensure no metal parts can touch the pcb on my desk printer another desk ,.. so it is just my pc the cable and the panel ,..

oliof

@grizewald true for serial devices in general, but I simply couldn't get bossac on linux to connect to my panel due (I am not a newcomer to linux either). Eventually I resorted to using a Windows machine of a friend (using the same cable). Maybe it was a freak occurrence.

tkamsker

Hi ,
so back to my problem ,..
i have OSX (preferred) ,linux and Windows 7 m, Windows 10 at hand. Windows 7 even on an separate Notebook dedicated for CAM. So my experience with FPGA, VFD drivers tells me that here is normally an Programming board. i can see that pins of the Panel PCB. So if USB doesnt work maybe there is an programming board and a cable like https://www.digikey.at/product-detail/de/ftdi/TTL-232R-3V3/768-1015-ND/1836393?utm_adgroup=Cable+Assemblies&mkwid=sQAoSZwyZ&pcrid=291655443974&pkw=&pmt=&pdv=c&productid=1836393&slid=&gclid=CjwKCAjwldHsBRAoEiwAd0JybdyMRTduvasALP6DtA76xj4GciCEUKOtsU-D_tbCVXB5aW13jUbLmBoCtkoQAvD_BwE helping to overcome my issue ?
help would be great

grizewald

From what I can see on the 7i PCB, the data lines from the USB connector go straight to the microprocessor. So the USB-Serial function is performed on the microprocessor itself. There is no intermediate USB-Serial converter to bypass.

I'm out of ideas here.