Question

如何在RPi Zero W中正确配置串行端口？我有一顶SIM7000帽子，需要通过UART通讯。

因此，我转到RPI官方页面并...阅读文档... 我做了什么：

raspi-config->禁用串行控制台，启用串行硬件
编辑cmdline.txt->删除“ console = serial0,115200” (sudo nano /boot/cmdline.txt)
编辑config.txt->检查是否为enable-uart = 1 (sudo nano /boot/config.txt)
我不需要蓝牙，因此我想禁用它。然后，添加到config.txt "dtoverlay=pi3-disable-bt"
禁用系统服务：sudo systemctl disable hciuart
重新启动

根据文档，一切正常什么都没有。我正在尝试通过minicom或picocom连接，无法发送或接收任何东西... sudo minicom -D /dev/serial0或minicom -D /dev/ttyAMA0并冻结终端 picocom --baud 9600 /dev/ttyAMA0或serial0并冻结

尝试使用python代码，打开串口，尝试发送和接收某物，什么都没有...

ls -l /dev告诉我

serial0-> ttyAMA0，serial1-> ttyS0

dmesg | grep tty告诉我

[0.001271]控制台[tty1]已启用 [1.051160] 20201000.serial：MMIO 0x20201000（irq = 81，base_baud = 0）上的ttyAMA0是PL011 rev2

我访问了Google上的所有页面。我尝试使用pi3-miniuart-bt和sudo systemctl stop serial-getty@ttyS0.service和disable serial-getty...

有人知道如何进行串行工作吗？

这是完整的/boot/config.txt

# 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=off
#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
enable_uart=1
dtoverlay=pi3-disable-bt

[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

尝试picocom：

pi@raspberrypi:~ $ picocom /dev/ttyAMA0
picocom v3.1

port is        : /dev/ttyAMA0
flowcontrol    : none
baudrate is    : 9600
parity is      : none
databits are   : 8
stopbits are   : 1
escape is      : C-a
local echo is  : no
noinit is      : no
noreset is     : no
hangup is      : no
nolock is      : no
send_cmd is    : sz -vv
receive_cmd is : rz -vv -E
imap is        :
omap is        :
emap is        : crcrlf,delbs,
logfile is     : none
initstring     : none
exit_after is  : not set
exit is        : no

Type [C-a] [C-h] to see available commands
Terminal ready

我不会写

尝试Minicom：

Welcome to minicom 2.7.1

OPTIONS: I18n
Compiled on Aug 13 2017, 15:25:34.
Port /dev/serial0, 20:12:31

Press CTRL-A Z for help on special keys

我不能写...。

我确实从该页面想到过： CONFIGURING GPIO SERIAL RPI

Raspberry Pi Zero W-串行uart不起作用

0 个答案: