android emulator에서 serial port를 통해 embedded 장비와 통신하기

에뮬레이터

실행

디바이스 목록 조회

$ emulator -list-avds

# 결과 예시
Pixel_4_API_32_2

명령줄로 에뮬레이터 실행

$ emulator -avd avd_name [ {-option [value]} … ]

or

$ emulator @avd_name [ {-option [value]} … ]

# 예시
$ emulator -avd Nexus_5X_API_23 -netdelay none -netspeed full

시리얼 포트 연결

시리얼 포트 지정 ( mac ) - 미완성

시리얼 포트 조회

• https://serverfault.com/questions/872238/qemu-and-serial-ports-on-the-guest-os

$ ls /dev/tty.*
$ ls /dev/cu.*
$ ls /dev/{tty,cu}.* # 위 두개 커맨드 한번에 조회

# 결과 예시
/dev/tty.Bluetooth-Incoming-Port /dev/tty.usbserial-AD0JLURQ
/dev/tty.PaMuSlide               /dev/tty.wlan-debug

/dev/cu.Bluetooth-Incoming-Port /dev/cu.PaMuSlide               
/dev/cu.usbserial-AD0JLURQ      /dev/cu.wlan-debug

시리얼 포트 통신 내용 관찰

$ screen /dev/tty.[yourSerialPortName] [yourBaudRate]

# 예시
$ screen /dev/tty.usbserial-A6004byf 9600

시리얼 포트 연결해서 에뮬레이터 켜기

• 공식문서 : https://developer.android.com/studio/run/emulator-commandline?hl=ko

• qemu 문서 : https://qemu.weilnetz.de/w32/2011/2011-02-10/qemu-doc.html

# 예시
$ emulator -avd Pixel_2_API_30 -verbose -qemu -serial COM6
$ emulator -avd Pixel_4_API_32_2 -verbose -qemu -serial /dev/tty.usbserial-AD0JLURQ\

emulator -avd Pixel_4_API_32_2 -verbose -qemu -chardev tty,path=/dev/ttyUSB0,id=usbserial-AD0JLURQ -serial /dev/tty.usbserial-AD0JLURQ\

emulator -avd Pixel_4_API_32_2 -no-snapshot -qemu -device usb-ehci,id=ehci -device usb-host,bus=ehci.0,hostbus=1,hostport=4

VERBOSE | Starting hostapd main loop.
VERBOSE | Android qemu version 30.9.4.0 (build_id 7759208) (CL:N/A)
VERBOSE | Starting QEMU main loop
VERBOSE | registered 'boot-properties' qemud service
VERBOSE | Adding boot property: 'ro.opengles.version' = '196608'
VERBOSE | Adding boot property: 'qemu.sf.fake_camera' = 'front'
VERBOSE | Adding boot property: 'dalvik.vm.heapsize' = '512m'
VERBOSE | Adding boot property: 'qemu.hw.mainkeys' = '0'
VERBOSE | Adding boot property: 'qemu.sf.lcd_density' = '440'
INFO    | Rootcanal has **NOT** been activated.
qemu-system-aarch64: -serial /dev/tty.usbserial-AD0JLURQ: 'serial' is not a valid char driver name
qemu-system-aarch64: -serial /dev/tty.usbserial-AD0JLURQ: could not connect serial device to character backend '/dev/tty.usbserial-AD0JLURQ'
VERBOSE | Done with QEMU main loop
WARNING | Unknown tab selected.

• lsusb

  Github

  lsusb

  Owner

  jlhonora

  Updated

  Nov 3, 2024

  

brew update             && \
brew tap jlhonora/lsusb && \
brew install lsusb # m1이라면 arch -arm64 brew install lsusb

lsusb

Bus 001 Device 002: ID 1d5c:5510 Fresco Logic Inc. Frescologic USB2.0 HUB
Bus 001 Device 005: ID 413c:c010 Dell Inc. Dell DA310  Serial: 11AD1D0AB3B53D19051D0B00
Bus 001 Device 003: ID 0853:0134 0853 Mini Keyboard
Bus 001 Device 001: ID 0403:6001 Future Technology Devices International Limited FT232R USB UART  Serial: AD0JLURQ
Bus 000 Device 000: ID 1d5c:5510 Fresco Logic Inc. USB 3.1 Bus

시리얼 포트 지정 ( windows )

$ emulator.exe -avd Pixel_2_API_30 -verbose -qemu -serial COM6