시에라 무선 GSM 모뎀 EM7455 + Android 통합 오류

EM7455는 USB를 통해 단일 보드 컴퓨터(NanoPC-T2)에 연결됩니다.

AndroidRIL_5.1.11 바이너리를 빌드하고 Android 기기에서 실행한 후 Android 및 커널 소스에 AndroidRIL_5.1.11 바이너리를 연결했습니다. Android 로그에 다음 오류 메시지가 표시되었습니다.

# dmesg | grep sierra                                           
<6>[    1.184000] usbcore: registered new interface driver sierra_net

<6>[   40.552000] usbcore: registered new interface driver sierra

<6>[   40.564000] sierra: v.1.7.42_android_generic_2:USB Driver for Sierra Wireless USB modems

<3>[   47.308000] sierra_net: module is already loaded

<6>[   87.844000] sierra 1-1.1:1.0: Sierra USB modem converter detected

<4>[   87.872000] sierra_remove_sysfs_attrs 
usb_get_serial_port_data(port_tmp) = 0xd8c90000


<4>[   87.880000] kfree at sierra_remove_sysfs_attrs

<6>[   87.884000] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0

<6>[   87.892000] sierra 1-1.1:1.0: device disconnected

<6>[   90.920000] sierra 1-1.1:1.0: Sierra USB modem converter detected
<4>[   90.948000] sierra_remove_sysfs_attrs 
usb_get_serial_port_data(port_tmp) = 0xda6b8d80

<4>[   90.956000] kfree at sierra_remove_sysfs_attrs

<6>[   90.960000] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0

<6>[   90.968000] sierra 1-1.1:1.0: device disconnected


127|root@nanopi2:/ # dmesg | grep sierra                                       
<6>[    1.184000] usbcore: registered new interface driver sierra_net
<6>[   40.552000] usbcore: registered new interface driver sierra
<6>[   40.564000] sierra: v.1.7.42_android_generic_2:USB Driver for Sierra Wireless USB modems

<3>[   47.308000] sierra_net: module is already loaded
<6>[   87.844000] sierra 1-1.1:1.0: Sierra USB modem converter detected
<4>[   87.872000] sierra_remove_sysfs_attrs usb_get_serial_port_data(port_tmp) = 0xd8c90000

<4>[   87.880000] kfree at sierra_remove_sysfs_attrs

<6>[   87.884000] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0

<6>[   87.892000] sierra 1-1.1:1.0: device disconnected

<6>[   90.920000] sierra 1-1.1:1.0: Sierra USB modem converter detected

<4>[   90.948000] sierra_remove_sysfs_attrs 

usb_get_serial_port_data(port_tmp) = 0xda6b8d80
<4>[   90.956000] kfree at sierra_remove_sysfs_attrs
<6>[   90.960000] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0

<6>[   90.968000] sierra 1-1.1:1.0: device disconnected

이 오류 해결 방법 아시는 분 계시면 도와주세요. 감사해요!