RGB LED color control with Raspberry Pi--python version

please refer to the other blog post for the circuit connection method: "Color control for RGB LEDs with Raspberry Pi--c language version"

Python code:

#!/usr/bin/env python#********************************************************* #File Name:rgb.py#author:jason Dai  #Date: 2015/02/04#*********************************************************import Rpi.gpio as GPIOimport timecolors = [0xFF0000, 0x00FF00, 0x0000FF, 0xffff00, 0xff00ff, 0x00ffff, 0xFFFFFF, 0x9400d3]pins = {' Pin_r ': One, ' pin_g ': ' Pin_b ' : Pins is a dictgpio.setmode (GPIO). BOARD) # Numbers GPIOs by physical locationfor I in Pins:GPIO.setup (Pins[i], GPIO. # Set pins ' mode is outputgpio.output (pins[i), GPIO. High) # Set pins to High (+ 3.3v) to off ledp_r = GPIO. PWM (pins[' Pin_r '), # set frequece to 2khzp_g = GPIO. PWM (pins[' Pin_g '), p_b = GPIO. PWM (pins[' Pin_b '), P_r.start (+) # Initial Duty Cycle = (LEDs off) P_g.start (+) P_b.start (+) def map (x, In_ Min, In_max, Out_min, Out_max): # Maps a number from one interval linearly to another, such as mapping a number between 0~100 to 0~255 return (x-in_min) * (out_max-out_min) /(In_max-in_min) + out_mindef SetColor (col): # for ExampLe:col = 0x112233r_val = (col & 0xFF0000) >> 16g_val = (col & 0x00FF00) >> 8b_val = (Col & 0x000  0FF) >> 0r_val = map (r_val, 0, 255, 0, +) # change a num (0~255) to 0~100.g_val = map (g_val, 0, 255, 0,) b_val = Map (b_val, 0, 255, 0, +) p_r.changedutycycle (100-r_val) # change duty cyclep_g.changedutycycle (100-g_val) P_B.C Hangedutycycle (100-b_val) try:while true:for col in Colors:setcolor (col) time.sleep (0.5) except Keyboardinterrupt:p_ R.stop () P_g.stop () P_b.stop () for I in Pins:GPIO.output (Pins[i], GPIO. High) # Turn off all Ledsgpio.cleanup ()

To run the program:

Python rgb.py

RGB LED color control with Raspberry Pi--python version