DZ01-USB-FIX

Turns on the USB ports at boot on the Bigtreetech DZ01 board with Allwinner H616 Linux host. This fix was specifically engineered for the Delta Flyer 3d Printer but should apply to any user of the Bigtreetech Armbian image for this board.

A special thanks to www.github.com/adelyser (@cowboy6825 on discord) who helped me when I couldn't fathom some of the finer points of the DTS file.

**This change involves adding a custom user overlay to the Linux build and requires a change to the printer.cfg supplied with Delta FLyer, do a backup of your configs.**

While doing the steps out of order will likely work you may suffer strange issues until all steps are completed, do them in order to reduce frustration.

Do I need to do this?

No, you don't need to do this fix unless you wish to use a USB powered touch screen and or USB connectivity for a toolhead board or other secondary MCU.

This guide assumes the printer is already operational but can be applied in the same order during the final software preparation stages.

** Step 1 **

Modify your printer.cfg to stop klipper from trying to do a workaround to turn on the USB.

This can be done either before uploading to the printer or once the printer.cfg is uploaded to your Mainsail interface.

** If you already have a working printer.cfg right click it and choose Duplicate a dialog will appear, asking for a name to call the duplicate. I add .backup to the end of mine for ease.

Now right click printer.cfg and choose edit

I recommend simply # out the lines and addint a comment to that section

Find his section:

# MORE INFO:  https://www.klipper3d.org/Config_Reference.html#output_pin
[output_pin _usb_host_en] # This turns on the USB ports on the DZ01, you should not need to change this.
pin: h616:gpio209  #PG17
value: 1

and change it to this (by adding the # to the beginning of each line)

#[output_pin _usb_host_en] # This turns on the USB ports on the DZ01, you should not need to change this.
#pin: h616:gpio209  #PG17
#value: 1

Then add this just above the changes we made to remind you what you did and why

### This has been changed to be handled by a custom overlay from https://github.com/chromusphil/DZ01-USB-FIX ###

** Step 2 **

Connect to the DZ01 using its IP address and the username/password of biqu/biqu Download the dz01-usb-regulator.dts file

** Step 3 **

Download the dts file and move to that directory

cd ~ && git clone https://github.com/chromusphil/DZ01-USB-FIX.git

cd DZ01-USB-FIX

** Step 4 **

Apply the overlay

sudo armbian-add-overlay dz01-usb-regulator.dts

The dialog should look something like this if it is successful

biqu@deltaflyer:/DZ01-USB-FIX/ sudo armbian-add-overlay dz01-usb-regulator.dts
Compiling the overlay
Copying the compiled overlay file to /boot/overlay-user/
Overlay dz01-usb-regulator was already added to /boot/armbianEnv.txt, skipping
Reboot is required to apply the changes 

As the dialog states its time to Power Cycle the machine. (Full power cycle not just a linux restart).

sudo shutdown now

Now power off the printer for 3 seconds and then power it on again