embeded/odroid
odroid c2 OTG와 mass storage
구차니
2021. 9. 19. 20:01
J1핀을 제거하면 USB OTG 포트를 전원 입력으로 사용할 수 없게 된다.
이 것은 전원 소비와 발열을 크게 감소시킬 것이다.
odroid-c2는 비디오 재생이나 몇몇 주변장치를 사용하는데 0.8Amp 이상을 소비하는데
USB port에 장치가 연결되면 1.5 A 이상을 연결하길 권장한다.
그런데 OTG가 도대체 (?) 머길래 전원 소비와 발열을 줄인다는거지?
| Remove the Jumper on J1 if you don't use the USB OTG port as a power input It will reduce the power consumption and heat significantly. Since ODROID-C2 can consume current more than 0.8Amp by itself while playing a video file or with some peripherals - keyboard/mouse/WiFi dongle - are attached to USB port, we strongly recommend to use 5V USB charger with minimal 1.5Amp+ can be supplied. Please note that still DC jack works with the same specification of ODROID-C2 apart from USB OTG for power supplying. |
[링크 : https://wiki.odroid.com/odroid-c2/hardware/otg_power_enable]
일단은 다행히(!) odroid u3에 쓰던 어댑터가 맞는것 같으니 바로 테스트 해봐야겠다..
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| # modprobe g_mass_storage modprobe: ERROR: could not insert 'g_mass_storage': Invalid argument # modprobe g_mass_storage file=/dev/mmcblk0p1 # dmesg [ 267.930878] Mass Storage Function, version: 2009/09/11 [ 267.930893] LUN: removable file: (no medium) [ 267.930919] no file given for LUN0 [ 267.931020] g_mass_storage dwc2_a: failed to start g_mass_storage: -22 [ 283.639994] Mass Storage Function, version: 2009/09/11 [ 283.640008] LUN: removable file: (no medium) [ 283.640082] LUN: file: /dev/mmcblk0p1 [ 283.640088] Number of LUNs=1 [ 283.640097] Number of LUNs=1 [ 283.640233] g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11 [ 283.640239] g_mass_storage gadget: userspace failed to provide iSerialNumber [ 283.640244] g_mass_storage gadget: g_mass_storage ready |
아쉽게도(?) otg 꽂힌채로는 바로 인식되진 않고 한번 뽑았다 꽂아주어야 인식을 한다.=
| # dmesg [ 352.483089] USB RESET [ 352.562416] usb 1-1.4: new high-speed USB device number 3 using dwc_otg [ 352.566533] USB RESET [ 352.664381] g_mass_storage gadget: high-speed config #1: Linux File-Backed Storage [ 352.665021] usb-storage 1-1.4:1.0: USB Mass Storage device detected [ 352.666447] usb-storage 1-1.4:1.0: Quirks match for vid 0525 pid a4a5: 10000 [ 352.666520] scsi0 : usb-storage 1-1.4:1.0 [ 353.663221] scsi 0:0:0:0: Direct-Access Linux File-Stor Gadget 0316 PQ: 0 ANSI: 2 [ 353.664962] sd 0:0:0:0: [sda] 262144 512-byte logical blocks: (134 MB/128 MiB) [ 353.665053] WARN::dwc_otg_pcd_ep_halt:2432: 1 IN XFer In process [ 353.674196] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 353.772882] sd 0:0:0:0: [sda] Write Protect is off [ 353.772895] sd 0:0:0:0: [sda] Mode Sense: 0f 00 00 00 [ 353.773086] WARN::dwc_otg_pcd_ep_halt:2432: 1 IN XFer In process [ 353.882776] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 353.883855] WARN::dwc_otg_pcd_ep_halt:2432: 1 IN XFer In process [ 353.993016] WARN::dwc_otg_pcd_ep_halt:2432: 1 IN XFer In process [ 354.103316] sda: [ 354.104539] WARN::dwc_otg_pcd_ep_halt:2432: 1 IN XFer In process [ 354.213075] WARN::dwc_otg_pcd_ep_halt:2432: 1 IN XFer In process [ 354.322785] sd 0:0:0:0: [sda] Attached SCSI disk [ 354.323219] WARN::dwc_otg_pcd_ep_halt:2432: 1 IN XFer In process |
일단 /dev/sda로 인식이 되었으니 마운트 하고 쓰고 sync도 해보고, umount도 해봄
OTG를 통해 쓰는거다 보니 바로 써지진 않고 sync나 umount 이후에 갱신되는게 확인된다.
| # mount /dev/sda /mnt # ls -al /mnt total 20862 drwxr-xr-x 3 root root 16384 Jan 1 1970 . drwxr-xr-x 21 root root 4096 Jan 28 2018 .. -rwxr-xr-x 1 root root 13622832 Aug 13 2019 Image drwxr-xr-x 2 root root 2048 Sep 17 21:05 'System Volume Information' -rwxr-xr-x 1 root root 6816 Jun 12 2018 boot.ini -rwxr-xr-x 1 root root 988 Jan 5 2017 boot.ini.default -rwxr-xr-x 1 root root 120 Jan 1 1980 display.bin -rwxr-xr-x 1 root root 256 Jan 1 1980 edid.bin -rwxr-xr-x 1 root root 29959 Aug 13 2019 meson64_odroidc2.dtb -rwxr-xr-x 1 root root 7671719 Aug 13 2019 uInitrd /mnt# touch test /mnt# ls -al total 20862 drwxr-xr-x 3 root root 16384 Sep 19 14:55 . drwxr-xr-x 21 root root 4096 Jan 28 2018 .. -rwxr-xr-x 1 root root 13622832 Aug 13 2019 Image drwxr-xr-x 2 root root 2048 Sep 17 21:05 'System Volume Information' -rwxr-xr-x 1 root root 6816 Jun 12 2018 boot.ini -rwxr-xr-x 1 root root 988 Jan 5 2017 boot.ini.default -rwxr-xr-x 1 root root 120 Jan 1 1980 display.bin -rwxr-xr-x 1 root root 256 Jan 1 1980 edid.bin -rwxr-xr-x 1 root root 29959 Aug 13 2019 meson64_odroidc2.dtb -rwxr-xr-x 1 root root 0 Sep 19 14:55 test -rwxr-xr-x 1 root root 7671719 Aug 13 2019 uInitrd # cd /media/boot/ media/boot# ls -al total 20862 drwxrwxrwx 3 root root 16384 Jan 1 1970 . drwxr-xr-x 3 root root 4096 Jun 12 2018 .. -rwxrwxrwx 1 root root 13622832 Aug 13 2019 Image drwxrwxrwx 2 root root 2048 Sep 17 21:05 'System Volume Information' -rwxrwxrwx 1 root root 6816 Jun 12 2018 boot.ini -rwxrwxrwx 1 root root 988 Jan 5 2017 boot.ini.default -rwxrwxrwx 1 root root 120 Jan 1 1980 display.bin -rwxrwxrwx 1 root root 256 Jan 1 1980 edid.bin -rwxrwxrwx 1 root root 29959 Aug 13 2019 meson64_odroidc2.dtb -rwxrwxrwx 1 root root 7671719 Aug 13 2019 uInitrd /media/boot# sync /media/boot# ls -al total 20862 drwxrwxrwx 3 root root 16384 Jan 1 1970 . drwxr-xr-x 3 root root 4096 Jun 12 2018 .. -rwxrwxrwx 1 root root 13622832 Aug 13 2019 Image drwxrwxrwx 2 root root 2048 Sep 17 21:05 'System Volume Information' -rwxrwxrwx 1 root root 6816 Jun 12 2018 boot.ini -rwxrwxrwx 1 root root 988 Jan 5 2017 boot.ini.default -rwxrwxrwx 1 root root 120 Jan 1 1980 display.bin -rwxrwxrwx 1 root root 256 Jan 1 1980 edid.bin -rwxrwxrwx 1 root root 29959 Aug 13 2019 meson64_odroidc2.dtb -rwxrwxrwx 1 root root 0 Sep 19 14:55 test -rwxrwxrwx 1 root root 7671719 Aug 13 2019 uInitrd /media/boot# touch /mnt/t2 :/media/boot# ls -al total 20862 drwxrwxrwx 3 root root 16384 Jan 1 1970 . drwxr-xr-x 3 root root 4096 Jun 12 2018 .. -rwxrwxrwx 1 root root 13622832 Aug 13 2019 Image drwxrwxrwx 2 root root 2048 Sep 17 21:05 'System Volume Information' -rwxrwxrwx 1 root root 6816 Jun 12 2018 boot.ini -rwxrwxrwx 1 root root 988 Jan 5 2017 boot.ini.default -rwxrwxrwx 1 root root 120 Jan 1 1980 display.bin -rwxrwxrwx 1 root root 256 Jan 1 1980 edid.bin -rwxrwxrwx 1 root root 29959 Aug 13 2019 meson64_odroidc2.dtb -rwxrwxrwx 1 root root 0 Sep 19 14:55 test -rwxrwxrwx 1 root root 7671719 Aug 13 2019 uInitrd /media/boot# umount /mnt /media/boot# ls -al total 20862 drwxrwxrwx 3 root root 16384 Jan 1 1970 . drwxr-xr-x 3 root root 4096 Jun 12 2018 .. -rwxrwxrwx 1 root root 13622832 Aug 13 2019 Image drwxrwxrwx 2 root root 2048 Sep 17 21:05 'System Volume Information' -rwxrwxrwx 1 root root 6816 Jun 12 2018 boot.ini -rwxrwxrwx 1 root root 988 Jan 5 2017 boot.ini.default -rwxrwxrwx 1 root root 120 Jan 1 1980 display.bin -rwxrwxrwx 1 root root 256 Jan 1 1980 edid.bin -rwxrwxrwx 1 root root 29959 Aug 13 2019 meson64_odroidc2.dtb -rwxrwxrwx 1 root root 0 Sep 19 14:56 t2 -rwxrwxrwx 1 root root 0 Sep 19 14:55 test -rwxrwxrwx 1 root root 7671719 Aug 13 2019 uInitrd |
다른 리눅스 노트북과는 연결이 되는데, 윈도우에서도 시도는 해봐야 할 듯.
[링크 : https://forum.odroid.com/viewtopic.php?t=32840]
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멀티 가젯은 머지?
[링크 : https://ndb796.tistory.com/479]
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21.09.26
msg ㅋㅋㅋㅋ
[링크 : https://www.kernel.org/doc/html/latest/usb/mass-storage.html]