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About mboehmer

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  1. Small update on the official image (Armbian 20.08.22 Focal with Linux 5.9.6-meson64): when I boot from eMMC, everything is fine. Inserting a Samsung uSD card leads to repeated "mmc1: error -84 whilst initialization". Trying to boot from uSD card (same image, working on eMMC) fails. System is stuck with"Starting kernel..." on console. Attaching the same uSD card by USB card reader works. So in case you find troubles with uSD card, check brand and product.
  2. Hi, have been off for a few days, too many ongoing projects. I'm really happy to see that C4 is now "supported", and want to express my thanks to all people involved! Aynway, a small issue: the download image is reporting to be officially supported, while both selfcompiled images (buster/focal) report themselfs as "trunk" images without official support. Welcome to Armbian 20.11.0-trunk Buster with Linux 5.9.9-meson64 No end-user support: built from trunk I used a freshly installed build system from yesterday night. Is this expected behaviour? The ne
  3. HI all, first of all, I found thi sissue adopting a new board to the CSC tree, done by @balbes150. As it seems to be a problem of RK3288 in general, I post here, in case please move the topic to the approriate place. I have a JLD076 board, and started adjusting the DTS to the schematic. According to the schematic, and the TRM of RK3289, there is a maximum number of 160 GPIOs. This is also the number I get from my schematics. So I expected th get suitable number of pins from gpioinfo (bank:number 0:19, 1:4, 2:18, 3:28, 4:26, 5:12, 6:19, 7:24, 8:10). Instea
  4. We are down... and modules seem to be in good shape. Let's hope the powerup will work as expected.
  5. To get things more structured, I start over now, and try to get things done more systematically. (1) The image found here can't be started from uSD card. I press the maskrom button shortly, following console output, and see that the RK3288 tries to boot from uSD card, but fails. (2) The images proposed by @balbes150 can be booted from uSD card, by shortly pressing the maskrom button. (3) A shortly pressed maskrom button forces uSD card booting, a long pressed maskrom button forces the board to go to RKUSB mode. Edir: @balbes150 is right, it starts also
  6. I recompiled the DTS and applied it in /boot/extlinux/extlinux.conf and get ERROR: reserving fdt memory region failed (addr=7df00000 size=d4638) Loading Device Tree to 0f8a1000, end 0f8b77e4 ... OK I will try thw Q8 image now, but it seems to lack ethernet support. Can you add it to the DTB? Otherwise I have to work all over USB serial which is a pain
  7. The schematic is not under NDA; but under gentlemen's agreement. I have to ask first.
  8. I have extracted the device tree from the eMMC based linux now, and attached it here. Does this help us? I have no access to the eMMC partitions for some reasons, as the eMMC partitions are Android type dts_orig.txt
  9. Thank you for your good explanation. I'm in contact with @balbes150 already, he helped me a lot. I used one of his images, and could successfully boot the board from uSD card. My main rror was to keep the maskrom switch pressed too long. If pressed shortly, it forces the RK3288 to skip the eMMC card and use the uSD card instead - it fails to load the kernel directly (as you pointed out) and loads the included 2020 Uboot, which does the rest. If pressed too long, it goes to real MaskROM loader... AFAIK it is possible to reflash the single sectors of eMMC later with
  10. Any idea on how to prepare a microSD card with all stuff needed? I can force the board into bootloader mode by a switch, and it tries to boot from uSD card, but fails: DDR Version 1.06 20171020 In Channel a: DDR3 400MHz Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB Channel b: DDR3 400MHz Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB Memory OK Memory OK OUT Boot1 Release Time: Apr 11 2018 10:32:58, version: 2.36 ChipType = 0x8, 227 mmc2:cmd19,256 SdmmcInit=2 0 BootCapSize=2000 UserCapSize=7456MB FwPartOffset=2000 , 2000 mmc0:cmd5,32 SdmmcInit
  11. I received full documentation for building the "genuine" LInux of the board (won't start reading now, our deep sea deployment takes place today). I tried to backup the partition information with this tool, which works for the Android 7.1 board version, but fails on the Linux board version. Next I will try to get some uSD card image booted...
  12. I'm a bit wiser now: in Uboot the partition table is like this: Partition Map for MMC device 0 -- Partition Type: EFI Part Start LBA End LBA Name Attributes Type GUID Partition GUID 1 0x00004000 0x00005fff "uboot" attrs: 0x0000000000000000 type: cb280000-0000-4d3c-8000-7b5800000ab9 guid: dd3d0000-0000-473b-8000-58800000230e 2 0x00006000 0x00007fff "trust" attrs: 0x0000000000000000 type: e86f0000-0000-495e-8000-30c300005377 guid: 42040000-0000-4900-8000-0198
  13. Do you think this could work? How can I "swap" the device tree? I still wait for some information from board vendor, I don't want tp brick it Would it be possible to manually start a uSD card image from Uboot, instead of fixed eMMC?
  14. /boot is empty. Partitions seem to be a bit strange: Disk /dev/mmcblk2: 7.3 GiB, 7818182656 bytes, 15269888 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 9E460000-0000-470B-8000-0417000014B1 Device Start End Sectors Size Type /dev/mmcblk2p1 16384 24575 8192 4M unknown /dev/mmcblk2p2 24576 32767 8192 4M unknown /dev/mmcblk2p3 32768 40959 8192 4M unknown /dev/mmcblk2p4 40960 106495 65536 32M unkn