MTK串口调试LOG显示设备打不开

用mtk 自带的serialchat做串口1的测试，log信息中发现设备打不开，有人遇到过吗，如何解决，谢谢。
D/DisplayEventReceiver(  649): rev(0xb8c59120) w/ vsync, t=11223587016344, id=0, c=87177
D/SurfaceFlinger(  150): requestNextVsync(649)
D/SurfaceFlinger(  150): postEvent(649, v/c=87178)
E/SerialServiceJNI(  649): could not open /dev/ttyMT1
W/ActivityManager(  649): Activity pause timeout for ActivityRecord{371cddc0 u0 com.android.serialchat/.SerialChat t11}
I/libPerfService(  649): 1: set: 1
E/libPerfService(  649): Could not open '/sys/devices/system/cpu/cpufreq/hotplug/cpu_num_base'
E/libPerfService(  649): error : 13, Permission denied
I/libPerfService(  649): 1: set freq: 0
E/libPerfService(  649): write file (/proc/cpufreq/cpufreq_cur_freq) fail, count: -1
E/hwcomposer(  150): [SYNC] (0xb80bd740) [PF] (0) fence 218 didn't signal in 1000 ms
I/hwcomposer(  150): [SYNC] (0xb80bd740) timeline fd(-1) curr(0) last(0)
I/hwcomposer(  150): [SYNC] (0xb80bd740) fence(ovl_fence-0-11866) status(0)
I/hwcomposer(  150): [SYNC] (0xb80bd740) sync point: timeline(present_fence_timeline) drv(sw_sync) status(0) sync_drv(11867) timestamp(0.000000)
I/SurfaceFlinger(  150): [Built-in Screen (type:0)] fps:4.970897,dur:1005.85,max:339.23,min:19.86
W/hwcomposer(  150): [WKR] Timed out waiting for UIComposeThread_0...

路过学习

是不是权限不够?

用ADB查看一下这个设备的权限。

还请大侠明示，我是用adb命令运行的app:adb shell am start -n com.android.serialchat/com.android.serialchat.SerialChat

我把dev/ttyMT1权限改成777也打不开

你用ADB查看了没?

用ADB怎么看?我查了百度了一下，没找到相关命令，还请明示，谢谢

我晕到。你用ADB进到这个dev下，用ls -l就能查看了。

看了，是crwxrwxrwx  root  root  204,210   2010-01-01 00:00  ttyMT1

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