Learning Python

#!/usr/bin/env python3
#modified for Raspberry Pi 5
from gpiozero import PWMLED
import time

colors = [0xFF00, 0x00FF, 0xFFFF, 0x0000]
pins = (17, 18) # pins is a dict GPIO17, GPIO18

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 setup():
p_R = PWMLED(pins[0], frequency = 2000) # set Frequece to 2KHz
p_G = PWMLED(pins[1], frequency = 2000)
p_R.off() # Initial duty Cycle = 0(leds off)
p_G.off()
return p_R, p_G

def setColor(col): # For example : col = 0x1122
R_val = col >> 8
G_val = col & 0x00FF

R_val = map(R_val, 0, 255, 0, 1)
G_val = map(G_val, 0, 255, 0, 1)

p_R.value = R_val # Change duty cycle
p_G.value = G_val

def loop():
while True:
for col in colors:
setColor(col)
time.sleep(3)

def destroy():
p_R.off()
p_G.off()

if __name__ == "__main__":
p_R, p_G = setup()
try:
loop()
except KeyboardInterrupt:
destroy()

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MisterEd said:

I learned to use Python on my Raspberry Pis. Building electronic circuits on the breadboard and controlling them with a Python program is a lot of fun.

BTW, the electronic circuit kits I bought came with Python and C code. Unfortunately, the code was developed to run on Raspberry Pi 3 and 4s. The code as is doesn't t work on a Raspberry Pi 5 because the architecture changed on it causing the libraries to break. I had to rewrite the code using compatible libraries.

You might try a headless boot of the Raspberry Pi 5 and control it with a laptop. I keep my Raspberry Pi 5 on a coffee table and plug it in when I want to use it. Using the laptop saves having to go and get a monitor, keyboard and mouse.

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Tasmania Green said:

What’s a headless boot?

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