为什么禁用蓝牙后我的RPi UART0（ttyAMA0）冻结？

Question

我有一个raspberry pi 3模型b（Raspbian GNU / Linux 10（破坏程序），我想禁用连接到UART0（引脚8和10）的蓝牙模块以使用UART0。当我将dtoverlay=disable-bt添加到/boot/config.txt的末尾并连接UART设备时，树莓派会冻结或使我退出。

有人知道为什么会发生这种情况吗？

我也卸载了使用蓝牙的应用程序。我已经运行了以下命令：

sudo systemctl disable hciuart.service
sudo systemctl disable bluealsa.service
sudo systemctl disable bluetooth.service

我的/boot/config.txt b文件看起来像这样：

# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
dtparam=i2c_arm=on
#dtparam=i2s=on
dtparam=spi=on

# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
dtoverlay=vc4-fkms-v3d
max_framebuffers=2

[all]
#dtoverlay=vc4-fkms-v3d

# Enable UART
enable_uart=1

感谢您的任何帮助。

Answer 1

我发现在/boot/config.txt中添加不必要的空格会导致我的错误。

我写过：

dtoverlay = disable-bt

而不是：

dtoverlay=disable-bt

此外，它有助于转到Pi > Preferences > RPi Configurations > Interfaces以确保启用了串行端口。