"""
LoRa-Training / led_tester - Test the leds connected to the board (called green and red) 
Copyright (C) 2024  Benjamin Burkhardt

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
"""

from machine import Pin
from time import sleep
import gc

def run(run_forever=False):
    green = Pin(26, Pin.OUT)
    red = Pin(27, Pin.OUT)
        
    g = True
    r = None
    counter = 0

    while counter < 4 or run_forever:
        r = g
        g = not g
        
        red.value(r)
        green.value(g)
        
        counter += 1
        sleep(0.5)
    
    if not run_forever:  # do cleanup
        red.value(0)
        green.value(0)
        gc.collect()
    

if __name__ == "__main__":
    run(True)