| 树莓派 | T型转接板 | 双色LED模块 |
|---|---|---|
| GPIO0 | GPIO17 | R |
| GND | GND | GND |
| GPIO1 | GPIO18 | G |
python代码
#!/usr/bin/env python
import RPi.GPIO as GPIO
import time
colors = [0xFF00,0x3344, 0x00FF, 0x0FF0, 0xF00F] #定义亮度
pins = (11,12) #11，12是树莓派上的针脚
GPIO.setmode(GPIO.BOARD)
GPIO.setup(pins, GPIO.OUT)
GPIO.output(pins, GPIO.LOW)
p_R = GPIO.PWM(pins[0], 2000)
p_G = GPIO.PWM(pins[1], 2000)
p_R.start(0)
p_G.start(0)
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(col):
R_val = col >> 8
G_val = col & 0x00FF
R_val = map(R_val, 0, 255, 0, 100)
G_val = map(G_val, 0, 255, 0, 100)
p_R.ChangeDutyCycle(R_val)
p_G.ChangeDutyCycle(G_val)
def loop():
while True:
for col in colors:
setColor(col)
time.sleep(0.5)
def destroy():
p_R.stop()
P_G.stop()
GPIO.oupt(pins, GPIO.LOW)
GPIO.cleanup()
if __name__ == "__main__":
try:
loop()
except KeyboardInterrupt:
destroy()
