User Manual

softPwmWrite(LedPinBlue, b_val);

}

ledColorSet(0xff,0x00,0x00); // red calls the function defined before. Write oxff into

LedPinRed and ox00 into LedPinGreen and LedPinBlue. Only the Red LED lights up after

running this code. If you want to light up LEDs in other colors, just modify the

parameters.

For Python users:

Step 2: Open the code file

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

Step 3: Run

sudo python 05_rgb.py

Code Explanation

# Set up a color table in Hexadecimal

COLOR = [0xFF0000, 0x00FF00, 0x0000FF, 0xFFFF00, 0xFF00FF, 0x00FFFF]

# Set pins' channels with dictionary

pins = {'Red':17, 'Green':18, 'Blue':27}

p_R = GPIO.PWM(pins['Red'], 2000) # the same as the last lesson, here we configure

the channels and frequencies of the 3 PWM.

p_G = GPIO.PWM(pins['Green'], 2000)

p_B = GPIO.PWM(pins['Blue’], 2000)

p_R.start(0) # the same as the last lesson, the PWM of the 3 LEDs begin with 0.

p_G.start(0)

p_B.start(0)

# Define a MAP function for mapping values. Like from 0~255 to 0~100

def MAP(x, in_min, in_max, out_min, out_max):

return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min

def setColor(color): # configures the three LEDs’ luminance with the inputted

color value .

R_val = (color & 0xFF0000) >> 16 # these three lines are used for analyzing the

col variables

G_val = (color & 0x00FF00) >> 8 # assign the first two values of the

hexadecimal to R, the middle two assigned to G

B_val = (color & 0x0000FF) >> 0 # assign the last two values to B, please

refer to the shift operation of the hexadecimal for details.

SunFounder