i want to use a radxa zero 1.51 with a flightcontroller which is connected with an uart and got this to work with a connection from pin 27 and 28 (UART_AO_B_RX, UART_AO_B_TX),
running with radxa-zero-ubuntu-focal-server-arm64-20220801-0346-mbr.img.xz (any image after that doesnt want to boot, i think i pretty much tried them all, that came after 0801)
and adding overlays=meson-g12a-uart-ao-b-on-gpioao-2-gpioao-3 to the uEnv.txt
i power the zero with gpio pins 2 and 6 (5v,gnd) so i have a free OTG usb port
for my drone project, i have very limited space and want to limit weight as much as possible
i need 2 devices connected with usb (4g dongle and usb cam). Both work fine with a usb hub connected to the Host usb port.
i want to remove the usb hub ( due limited space and weight), and use the usb otg port
but it doesnt work with radxa-zero-ubuntu-focal-server-arm64-20220801-0346-mbr.img.xz image
i also tried Armbian_22.11.1_Radxa-zero_jammy_edge_6.0.10.img.xz, on which the usb otg port WORKS FINE as a host usb
but the problem with Armbian is the lacking uart support, i cant get the uart connection to work with armbian
But i also found rbuild
with this i could build a new debian image
and it booted
and the otg port on my zero works as a host
but the way overlays work seams to be different.
i found my needed overlay in /boot/dtbo/meson-g12a-uart-ao-b-on-gpioao-2-gpioao-3.dtbo.disabled
but how do i enable it? is there any documentation on this? i already tried removing .disabled to enable it, but is doesnt seam to work that simple. could use another push in the right direction
please install qemu-user-static and binfmt-support packages, then, please try again.
rbuild is new, still in development tool. there are some issues.
on rbuild image, dtbo should be managed by rsetup command (Overlays → Manage overlays) but currently it’s not working on zero. you can do same thing by u-boot-update command after .disabled part is removed from dtbo file. then, you should be able to see fdtoverlays line in /boot/extlinux/extlinux.conf. u-boot will load dtbo file(s) in fdtoverlays line.
but sorry, currently something is not working correctly. I tried it myself, then I got following error in u-boot:
Retrieving file: /boot/dtbo/meson-g12a-uart-ao-b-on-gpioao-2-gpioao-3.dtbo
failed on fdt_overlay_apply(): FDT_ERR_NOTFOUND
overlay on stable (5.10) kernel is not working yet… then, I checked latest (6.1) kernel, overlay is working on it. could you try to build latest kernel with bsp?
if you want rbuild image with latest kernel, you can build it as follows.
i need more time to investigate
i tryed with a backed up kernel, and it kinda worked with the uart..some static, hard to explain yet
i like to see the bug fixed with bsp
flip@debian-amd64:~/bsp$ ./bsp -C linux latest radxa-zero
~~
Applied patch drivers/gpu/drm/panel/panel-simple-dsi.c cleanly.
Applying: Bluetooth: Add new quirk for broken local ext features max_page
Checking patch include/net/bluetooth/hci.h…
error: while searching for:
* during the hdev->setup vendor callback.
*/
HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN,
};
/* HCI device flags */
error: patch failed: include/net/bluetooth/hci.h:274
Checking patch net/bluetooth/hci_event.c…
Hunk #1 succeeded at 881 (offset 44 lines).
Applying patch include/net/bluetooth/hci.h with 1 reject…
Rejected hunk #1.
Applied patch net/bluetooth/hci_event.c cleanly.
Patch failed at 0005 Bluetooth: Add new quirk for broken local ext features max_page
hint: Use ‘git am --show-current-patch=diff’ to see the failed patch
When you have resolved this problem, run “git am --continue”.
If you prefer to skip this patch, run “git am --skip” instead.
To restore the original branch and stop patching, run “git am --abort”.
bsp
flip@debian-amd64:~/bsp$
first i had some problems with the output of the flightcontroller, but that was due to a buggy firmware i used. with official ardupilot firmware, there was no noise to see.
