User Manual

In either way, you now are in the folder C. The subsequent procedures under the two

methods are the same. Let's move on.

Step 3: Compile the Code

gcc 01_blinkLed.c -o 01_blinkLed -lwiringPi

Note: gcc is GNU Compiler Collection. Here, it functions like compiling the C language file

01_blinkLed.c and outputting an executable file 01_blinkLed. In the command, -o means

outputting and -lwiringPi is to load the library wiringPi (l is short for library).If you want to write your

own C code and compile to run it, you need to master gcc.

Since the gcc command is too long, you can use make to test the experimental effect of the

kit to make the process quicker and more convenient.

make 01_blinkLed

Note: The make command will compile according to the rules in the Makefile. Two files will be

generated after compiling: “*.o” and an executable file.

We use makefile, in essence, is to write the compilation method of gcc into the automated

script. If you have written your own program in C language, you need to write and modify the

makefile so as to use make command to compile your C code.

Step 4: Run the executable file output in the previous step:

sudo ./01_blinkLed

Note: To control the GPIO, you need to access to led with the permission of superuser (sudo is

not needed to control the GPIO for the raspbian system after 2016-5-27), namely, by the

command sudo. In the command “./” indicates the current directory. The whole command is to

run the 01_blinkLed in the current directory.

SunFounder