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【环境信息】
系统：aarch64，x86虚拟机
内存：4g
cpu：4核
OS版本：20.03-LTS-SP2
EPOL-yum源：http://121.36.84.172/dailybuild/openEuler-20.03-LTS-SP2/openeuler-2021-06-02-11-07-26/EPOL/main/$basearch/
【问题复现步骤】
1.安装源码包: yum install -y raspberrypi-bluetooth
2.启动服务: systemctl start bthelper@.service
3.启动服务: systemctl start hciuart.service
【预期结果】
2、3.服务启动成功
【实际结果】
2、3.服务启动失败
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bthelper@ 服务在树莓派上正常启动命令和 log 参考：
[root@openEuler system]# systemctl start bthelper@hci0@up
[root@openEuler system]# systemctl status bthelper@hci0@up
● bthelper@hci0@up.service - Raspberry Pi bluetooth helper
Loaded: loaded (/usr/lib/systemd/system/bthelper@.service; static; vendor preset: disabled)
Active: active (exited) since Tue 2021-06-08 12:23:08 CST; 4s ago
Process: 767 ExecStart=/usr/bin/bthelper hci0@up (code=exited, status=0/SUCCESS)
Main PID: 767 (code=exited, status=0/SUCCESS)
Jun 08 12:23:08 openEuler systemd[1]: Starting Raspberry Pi bluetooth helper...
Jun 08 12:23:08 openEuler bthelper[767]: Raspberry Pi BDADDR already set
Jun 08 12:23:08 openEuler bthelper[774]: Changing power off succeeded
Jun 08 12:23:08 openEuler bthelper[776]: Changing power on succeeded
Jun 08 12:23:08 openEuler systemd[1]: Started Raspberry Pi bluetooth helper.
hciuart 服务在树莓派上正常启动命令和 log 参考：
[root@openEuler ~]# systemctl start hciuart.service
[root@openEuler ~]# systemctl status hciuart.service
● hciuart.service - Configure Bluetooth Modems connected by UART
Loaded: loaded (/usr/lib/systemd/system/hciuart.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2021-06-08 12:30:08 CST; 41s ago
Process: 287 ExecStart=/usr/bin/btuart (code=exited, status=0/SUCCESS)
Main PID: 332 (hciattach)
Tasks: 1
Memory: 1.2M
CGroup: /system.slice/hciuart.service
└─332 /usr/bin/hciattach /dev/serial1 bcm43xx 3000000 flow -
Jun 08 12:30:07 openEuler systemd[1]: Starting Configure Bluetooth Modems connected by UART...
Jun 08 12:30:07 openEuler btuart[287]: /usr/bin/btuart: line 19: warning: command substitution: ignored null byte in input
Jun 08 12:30:07 openEuler btuart[287]: /usr/bin/btuart: line 20: warning: command substitution: ignored null byte in input
Jun 08 12:30:08 openEuler btuart[308]: bcm43xx_init
Jun 08 12:30:08 openEuler btuart[308]: Set Controller UART speed to 3000000 bit/s
Jun 08 12:30:08 openEuler btuart[308]: Flash firmware /etc/firmware/BCM4345C5.hcd
Jun 08 12:30:08 openEuler btuart[308]: Set Controller UART speed to 3000000 bit/s
Jun 08 12:30:08 openEuler btuart[308]: Device setup complete
Jun 08 12:30:08 openEuler systemd[1]: Started Configure Bluetooth Modems connected by UART.
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