User Manual

Step 1: Build the circuit

For C language users:

Step 2: Open the code file

cd /home/pi/SunFounder_Super_Kit_V3.0_for_Raspberry_Pi/C

Step 3: Compile the Code

make 05_rgb

Step 4: Run the executable file above

sudo ./05_rgb

Code Explanation

#include <softPwm.h> // library used for realizing the pwm function of the software.

void ledInit(void){ // define function used for initializing I/O port to output for

pwm.

// LedPinX refers to one pin. 0 is the minimum value and 100 is the maximum (as a

percentage). The function is to use software to create a PWM pin, set its value between

0-100%.

softPwmCreate(LedPinRed, 0, 100);

softPwmCreate(LedPinGreen,0, 100);

softPwmCreate(LedPinBlue, 0, 100);

void ledColorSet(uchar r_val, uchar g_val, uchar b_val){ // This function is to set the

colors of the LED. Using RGB, the formal parameter r_val represents the luminance of the

red one, g_val of the green one, b_val of the blue one. The three formal parameters’

different values corresponds to various colors. You can modify the 3 formal parameters

randomly to verify.

softPwmWrite(LedPinRed, r_val);

softPwmWrite(LedPinGreen, g_val);

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