Debug uart doesn't work correctly with own IMG

VIM1 Android
1

I connected to Khadas Vim via USB to TTL Serial Cable. When I use this IMG I can read and write cmd via console. When I make own bould I can only read but I can’t send any cmd to board. How I can make IMG with rd and wr console?

2

Did you modify the source code? whta’s the changes?
The uart can work usually. Did you try to disconnect and reconnect the uart ?

3

I added Gapps only.I tryed to disconnect, reboot but it still doesn’t work.

4

Did you lunch the kvim-user and not kvim-user-debug when you build your source code? You need to lunch the kvim-user-debug or modify the default.prop

1 Like
5

Below you can see step by step how I made build.

  1. $ cd ~/khadas/mmallow
  2. $ source build/envsetup.sh
  3. $ lunch kvim-user-32
  4. $ make -j4 otapackage
    After that I run the board and uart doesn’t work correctly(I see messages but I can’t send cmd).
    After that I make next steps:
  5. $ cd ~/khadas/mmallow
  6. $ source build/envsetup.sh
  7. $ lunch kvim-userdebug-32
  8. $ make installclean
  9. $ make -j4 otapackage
    After that I run the board with new IMG but uart still only show messages.
6

I made repo status and I see one change in file core/clang/HOST_x86_common.mk

-  --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot
+  --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \
+  -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/bin
7

You can get the value of ‘ro.debuggable’ when your device is running.

$ adb shell
$ getprop ro.debuggable
8

I make it, and I see:

shell@vim:/ $ getprop ro.debuggable
0

9

If you did that,the value ‘ro.debuggable’ is 1
You can verify the value ‘ro.debuggable’ in the file ‘out/target/product/kvim/root/default.prop’

10

I have seen this file. I see next:

#
# ADDITIONAL_DEFAULT_PROPERTIES
#
ro.opengles.version=131072
ro.secure=1
security.perf_harden=1
ro.allow.mock.location=0
ro.debuggable=1
ro.zygote=zygote32
dalvik.vm.image-dex2oat-Xms=64m
dalvik.vm.image-dex2oat-Xmx=64m
dalvik.vm.dex2oat-Xms=64m
dalvik.vm.dex2oat-Xmx=512m
ro.dalvik.vm.native.bridge=0
debug.atrace.tags.enableflags=0
persist.sys.usb.config=mtp,adb
#
# BOOTIMAGE_BUILD_PROPERTIES
#
ro.bootimage.build.date=Ср май 24 22:14:32 MSK 2017
ro.bootimage.build.date.utc=1495653272
ro.bootimage.build.fingerprint=Khadas/kvim/kvim:6.0.1/MHC19J/20170524:userdebug/test-keys

Why in this file I see ro.debuggable=1 but after I run IMG i see 0?

11

I’m sorry. It is a my mistake, i make build on virtualbox and move it to windows via shared folder. Before I copy the image i should mount folder but i forgot it. I use old image and didn’t see changes. After I run new image uart works good. Thank you!