树莓派C/C++ GPIO控制WiringPi库源码

# WiringPi WiringPi is a _performant_ GPIO access library written in C for Raspberry Pi boards. :warning:️ :construction: on Pi5, PWM support is currently under development and _will not work at this point_. If you're interested in the progress, please check the [corresponding issue](https://github.com/GrazerComputerClub/WiringPi/issues/21). To compile programs with wiringPi, you need to include `wiringPi.h` as well as link against `wiringPi`: ```c #include <wiringPi.h> // Include WiringPi library! int main(void) { // uses BCM numbering of the GPIOs and directly accesses the GPIO registers. wiringPiSetupGpio(); // pin mode ..(INPUT, OUTPUT, PWM_OUTPUT, GPIO_CLOCK) // set pin 17 to input pinMode(17, INPUT); // pull up/down mode (PUD_OFF, PUD_UP, PUD_DOWN) => down pullUpDnControl(17, PUD_DOWN); // get state of pin 17 int value = digitalRead(17); if (HIGH == value) { // your code } } ``` To compile this code, link against wiringPi: ```sh gcc -o myapp myapp.c -l wiringPi ``` Be sure to check out the [examples](./examples/), build them using Make: ```sh cd examples make <example-name | really-all> ``` The tool `gpio` can be used to set single pins as well as get the state of everything at once: ``` pi@wiringdemo:~ $ gpio readall +-----+-----+---------+------+---+---Pi 3B--+---+------+---------+-----+-----+ | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM | +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+ | | | 3.3v | | | 1 || 2 | | | 5v | | | | 2 | 8 | SDA.1 | IN | 1 | 3 || 4 | | | 5v | | | | 3 | 9 | SCL.1 | IN | 1 | 5 || 6 | | | 0v | | | | 4 | 7 | GPIO. 7 | IN | 0 | 7 || 8 | 0 | IN | TxD | 15 | 14 | | | | 0v | | | 9 || 10 | 1 | IN | RxD | 16 | 15 | | 17 | 0 | GPIO. 0 | IN | 1 | 11 || 12 | 1 | IN | GPIO. 1 | 1 | 18 | | 27 | 2 | GPIO. 2 | IN | 1 | 13 || 14 | | | 0v | | | | 22 | 3 | GPIO. 3 | IN | 1 | 15 || 16 | 0 | IN | GPIO. 4 | 4 | 23 | | | | 3.3v | | | 17 || 18 | 1 | IN | GPIO. 5 | 5 | 24 | | 10 | 12 | MOSI | IN | 0 | 19 || 20 | | | 0v | | | | 9 | 13 | MISO | IN | 0 | 21 || 22 | 1 | IN | GPIO. 6 | 6 | 25 | | 11 | 14 | SCLK | IN | 0 | 23 || 24 | 1 | IN | CE0 | 10 | 8 | | | | 0v | | | 25 || 26 | 0 | IN | CE1 | 11 | 7 | | 0 | 30 | SDA.0 | IN | 1 | 27 || 28 | 1 | IN | SCL.0 | 31 | 1 | | 5 | 21 | GPIO.21 | IN | 0 | 29 || 30 | | | 0v | | | | 6 | 22 | GPIO.22 | IN | 0 | 31 || 32 | 1 | IN | GPIO.26 | 26 | 12 | | 13 | 23 | GPIO.23 | IN | 1 | 33 || 34 | | | 0v | | | | 19 | 24 | GPIO.24 | IN | 1 | 35 || 36 | 1 | IN | GPIO.27 | 27 | 16 | | 26 | 25 | GPIO.25 | IN | 1 | 37 || 38 | 1 | IN | GPIO.28 | 28 | 20 | | | | 0v | | | 39 || 40 | 1 | IN | GPIO.29 | 29 | 21 | +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+ | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM | +-----+-----+---------+------+---+---Pi 3B--+---+------+---------+-----+-----+ ``` ## Installing You can either build it yourself or use the prebuilt binaries: ### From Source 1. create debian-package ```sh # fetch the source sudo apt install git git clone https://github.com/WiringPi/WiringPi.git cd WiringPi # build the package ./build debian mv debian-template/wiringpi-3.0-1.deb . # install it sudo apt install ./wiringpi-3.0-1.deb ``` ### Prebuilt Binaries Grab the latest release from [here](https://github.com/WiringPi/WiringPi/releases). Unzip/use the portable prebuilt verison: ```sh # unzip the archive tar -xfv wiringpi_3.0.tar.gz ``` Install the debian package: ```sh # install a dpkg sudo apt install ./wiringpi-3.0-1.deb ``` ## Ports wiringPi has been wrapped for multiple languages: * Node - https://github.com/WiringPi/WiringPi-Node * Perl - https://github.com/WiringPi/WiringPi-Perl * PHP - https://github.com/WiringPi/WiringPi-PHP * Python - https://github.com/WiringPi/WiringPi-Python * Ruby - https://github.com/WiringPi/WiringPi-Ruby ## Support Please use the [issue system](https://github.com/WiringPi/WiringPi/issues) of GitHub. If you're not sure whether to create an issue or not, please engage in [discussions](https://github.com/WiringPi/WiringPi/discussions)! Please do not email Gordon or @Gadgetoid. Please don't email GC2 for reporting issues, you might [contact us](mailto:wiringpi@gc2.at) for anything that's not meant for the public. ## History This repository is the continuation of 'Gordon's wiringPi' which has been [deprecated](https://web.archive.org/web/20220405225008/http://wiringpi.com/wiringpi-deprecated/), a while ago. * The last "old wiringPi" source of Gordon's release can be found at the [`final_source_2.50`](https://github.com/WiringPi/WiringPi/tree/final_official_2.50) tag. * The default `master` branch contains code that has been written since version 2.5 to provide support for newer hardware as well as new features. :information_source:️ Since 2024, [GC2](https://github.com/GrazerComputerClub) has taken over maintenance of the project, supporting new OS versions as well as current hardware generations. We are dedicated to keeping the arguably best-performing GPIO Library for Raspberry Pi running smoothly. We strive to do our best, but please note that this is a community effort, and we cannot provide any guarantees or take responsibility for implementing specific features you may need. ## Debug WIRINGPI_DEBUG=1 ./my_wiringpi_program WIRINGPI_DEBUG=1 gpio readall