树莓派 gpio 安装及简单使用

安装

git clone https://github.com/WiringPi/WiringPi
cd WiringPi/
./build

查看版本

gpio -v
gpio version: 2.70

列出io

gpio readall

 +-----+-----+---------+------+---+-Model B1-+---+------+---------+-----+-----+| 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 | 1 |  7 || 8  | 1 | ALT0 | TxD     | 15  | 14  ||     |     |      0v |      |   |  9 || 10 | 1 | ALT0 | RxD     | 16  | 15  ||  17 |   0 | GPIO. 0 |   IN | 0 | 11 || 12 | 0 | IN   | GPIO. 1 | 1   | 18  ||  27 |   2 | GPIO. 2 |   IN | 0 | 13 || 14 |   |      | 0v      |     |     ||  22 |   3 | GPIO. 3 |   IN | 0 | 15 || 16 | 0 | IN   | GPIO. 4 | 4   | 23  ||     |     |    3.3v |      |   | 17 || 18 | 0 | IN   | GPIO. 5 | 5   | 24  ||  10 |  12 |    MOSI |   IN | 0 | 19 || 20 |   |      | 0v      |     |     ||   9 |  13 |    MISO |   IN | 0 | 21 || 22 | 0 | IN   | GPIO. 6 | 6   | 25  ||  11 |  14 |    SCLK |   IN | 0 | 23 || 24 | 1 | IN   | CE0     | 10  | 8   ||     |     |      0v |      |   | 25 || 26 | 1 | IN   | CE1     | 11  | 7   |+-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+| BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | BCM |+-----+-----+---------+------+---+-Model B1-+---+------+---------+-----+-----+

终端操作对应wPi序号

gpio mode 0  in 
gpio read 0gpio mod 0 out
gpio read 0
gpio write 0 1
gpio read 0

c 测试(定义在/usr/local/include/wiringPi.h )

#include <stdio.h>
#include <wiringPi.h>#define LED 0		int main(void)
{wiringPiSetup();		pinMode(LED, OUTPUT);	int val = 1;for(int i = 0; i < 20; i++){digitalWrite(LED, val);	delay(500);  //msval = ~val & 1;}
}