A good methodology to code Wi Py 2.

[ColombianAus]

Hello there,

I would like to read/find some advise in regards to how to create a "infinity loop" in Wi Py 2.0. I have done it by doing the following, but I am not so sure it is the best way.

so...I have a python.py file, and I might have the following functions defined and a "main" function inside a while(1)

import <> from <>

def aFuncion1:
#some code here...

def aFuncion2:
#some code here...

def main():
aFuncion1()
aFuncion2()

while(1):
main()

I have the feeling that I am wasting resources here, and there is a better way. so question time!!

1. Am I right or wrong in my programming approach?
2. I am not familiar with Threads? is this the way to go?
3. Any other ways to be more efficient code/ memory usage?
4. Any doco that I can be pointed to?

Cheers
Colombian

[livius]

@ColombianAus

This depend of code - e.g. better is have pin handler instead read it in every loop.
You can also use machine.idle to prevent 100% CPU usage
Without more specific sample of usage it is rather hard to advice something.

[ColombianAus]

@livius

Thank you for your reply. I am totally new to micro python programming style. All I want to do, at the moment is to turn a LED On and Off a fix number of times. Would you mind to elaborate a bit more about the pin handler option?

Cheers
ColmobianAus

[livius]

@ColombianAus

from machine import Pin

def pin_handler(arg):
    print("got an interrupt in pin %s" % (arg.id()))

p_in = Pin('P10', mode=Pin.IN, pull=Pin.PULL_UP)
p_in.callback(Pin.IRQ_FALLING | Pin.IRQ_RISING, pin_handler)

but for blinking led it is not good

import pycom
import time
pycom.heartbeat(False)
for cycles in range(10): # stop after 10 cycles
    pycom.rgbled(0x007f00) # green
    time.sleep(5)
    pycom.rgbled(0x7f7f00) # yellow
    time.sleep(1.5)
    pycom.rgbled(0x7f0000) # red
    time.sleep(4)

look into docs
https://docs.pycom.io/pycom_esp32/pycom_esp32/tutorial/includes/led.html

[bmarkus]

@ColombianAus said in A good methodology to code Wi Py 2.:

while(1):
main()

Never write while(1), use while(True) instead.

[ColombianAus]

Hi Everyone,

Ok, so it looks like at the end, it is not that bad to use a While(True) to generate an infinite loop. I know that a ON/OFF LED is not really a good example.

thank you everyone for the comments

Cheers
ColombianAus