Raspberry Pi GPIO pins All In One

Raspberry Pi GPIO pins All In One

Raspberry Pi GPIO Pinout / 树莓派 GPIO 引脚大全

https://pinout.xyz/

1. 引脚编号分类：物理编号、BCM GPIO 编号、WiringPi 编号

2. 通信方式分类：GPIO 通信、PWM 通信、I2C 通信、SPI 通信、UART 通信

What do these numbers mean?

GPIO - General Purpose Input/Output, aka "BCM" or "Broadcom".
These are the big numbers, e.g. "GPIO 22".
You'll use these with RPi.GPIO and GPIO Zero.

Physical - or "Board" correspond to the pin's physical location on the header.
These are the small numbers next to the header, e.g. "Physical Pin 15".

WiringPi - for Gordon Henderson's Wiring Pi library.
These are shown as a tooltip when you mouseover a pin.

Rev 1 Pi - alternate GPIO/BCM numbers for the original, 26-pin model "A" and "B" Pi.

zh-Hans

这些数字是什么意思？

GPIO - 通用输入/输出，又名“BCM”或“Broadcom”。
这些是大数字，例如 “GPIO 22”。 您将把它们与 RPi.GPIO 和 GPIO 零一起使用。

Physical - 或“Board”对应于引脚在插头上的物理位置。
这些是标题旁边的小数字，例如 “物理引脚 15”。

WiringPi - 用于 Gordon Henderson 的 Wiring Pi 库。
当您将鼠标悬停在图钉上时，这些将显示为工具提示。

Rev 1 Pi - 原始 26 针型号“A”和“B”Pi 的备用 GPIO/BCM 编号。

GPIO & Physical

WiringPi

WiringPi 是一种将类似 Arduino 接线的简单性引入 Raspberry Pi 的尝试。

https://pinout.xyz/pinout/wiringpi

目标是拥有一个单一的通用平台和一组功能，用于跨多种语言访问 Raspberry Pi GPIO。
WiringPi 本质上是一个 C 库，但 Ruby 和 Python 用户都可以使用它，他们可以分别使用“gem install wiringpi”或“pip install wiringpi”。

WiringPi 使用自己的引脚编号方案，此页面说明了 WiringPi 如何为您的 GPIO 引脚编号。

WiringPi 已被其原作者弃用。 ⚠️
有关正在进行的社区维护版本和端口的更多信息和支持，请参阅 WiringPi GitHub 组织：https://github.com/WiringPi/

C

# C
$ sudo apt-get install wiringpi

https://github.com/WiringPi/WiringPi

Python

https://github.com/WiringPi/WiringPi-Python

# Python 2
$ pip install wiringpi

# Python 3
$ pip3 install wiringpi
# 或
$ python3 -m pip3 install wiringpi

https://www.cnblogs.com/xgqfrms/p/17365120.html#5173370

$ sudo vim .bashrc

$ source ~/.bashrc

$ cat ~/.bashrc
# source ~/.bashrc
# sourc ~./.zshrc

# Python3 => py3 🐍
alias py3='python3'

# update ✅
# source ~/.bashrc

Node.js

$ npm i wiring-pi

# $ npm i wiringpi-node

https://www.npmjs.com/package/wiring-pi

https://www.npmjs.com/package/wiringpi-node

https://github.com/WiringPi/WiringPi-Node#install

I2C

Inter Integrated Circuit / 内部集成电路

GPIO 2 和 GPIO 3 - Raspberry Pi 的 I2C1 引脚 - 允许与各种外部传感器和设备进行两线通信。

I2C 引脚包括一个固定的 1.8 kΩ 上拉电阻至 3.3v。 它们不适合用作上拉可能会干扰的通用 IO。

I2C 是一种多点总线，多个设备可以连接到这两个相同的引脚。 每个设备都有自己唯一的 I2C 地址。

$ sudo apt-get install i2c-tools
$ sudo i2cdetect -y 1

https://pinout.xyz/pinout/i2c

#!/usr/bin/env python3
# coding: utf8

__author__ = 'xgqfrms'
__editor__ = 'vscode'
__version__ = '1.0.1'
__copyright__ = """
  Copyright (c) 2012-2050, xgqfrms; mailto:xgqfrms@xgqfrms.xyz
"""

import smbus

DEVICE_BUS = 1
DEVICE_ADDR = 0x15

bus = smbus.SMBus(DEVICE_BUS)
bus.write_byte_data(DEVICE_ADDR, 0x00, 0x01)

https://raspberry-projects.com/pi/programming-in-python/i2c-programming-in-python/using-the-i2c-interface-2

https://pinout.xyz/pinout/pin3_gpio2

https://pinout.xyz/pinout/pin5_gpio3

PWM

Pulse-width Modulation / 脉冲宽度调制

PWM（脉冲宽度调制）是一种通过打开和关闭数字引脚来产生模拟电压的方法。

数字信号 => 模拟信号

数模转换 / 模数转换

https://pinout.xyz/pinout/pwm

https://pinout.xyz/pinout/pin12_gpio18

https://pinout.xyz/pinout/pin32_gpio12

https://pinout.xyz/pinout/pin33_gpio13

https://pinout.xyz/pinout/pin35_gpio19

SPI

Serial Peripheral Interface / 串行外设接口

SPI 被称为四线串行总线，通过为它们分配不同的芯片选择引脚，您可以将多个兼容设备连接到一组引脚。

要与 SPI 设备通信，您需要断言其对应的片选引脚。

默认情况下，Pi 允许您将 SPI0 与 GPIO 8 上的 CE0 和 GPIO 7 上的 CE1 上的芯片选择引脚一起使用。

You can enable SPI1 with a dtoverlay configured in "/boot/config.txt"

dt overlay / 数据覆盖

$ vim /boot/config.txt
# dtoverlay=spi1-3cs

https://pinout.xyz/pinout/spi

https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/

https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/overlays/README

$ car /boot/config.txt > boot-config-txt.md

$ cat ./boot-config-txt.md

# 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 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

# Automatically load overlays for detected cameras
camera_auto_detect=1

# Automatically load overlays for detected DSI displays
display_auto_detect=1

# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2

# Run in 64-bit mode
arm_64bit=1

# Disable compensation for displays with overscan
disable_overscan=1

[cm4]
# Enable host mode on the 2711 built-in XHCI USB controller.
# This line should be removed if the legacy DWC2 controller is required
# (e.g. for USB device mode) or if USB support is not required.
otg_mode=1

[all]

[pi4]
# Run as fast as firmware / board allows
arm_boost=1

[all]

UART

Universal Asynchronous Receiver/Transmitter / 通用异步接收器/发送器

import wiringpi

wiringpi.wiringPiSetup()

serial = wiringpi.serialOpen('/dev/ttyAMA0', 9600)

wiringpi.serialPuts(serial, 'hello world!')

https://pinout.xyz/pinout/uart

demos

WiringPi

tips

优先选择纯 GPIO 功能的引脚✅

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