EuroPi Bootloader Script Example

main.py

## Each script defined in its own file. This is a generic example script.
class ExampleScript:

  def __init__(self, name: str):
    self.name = name

  def run(self):
    while True:
      print("Running {}".format(self.name))
      sleep_ms(500)


## main.py (bootloader and main script execution)
from utime import sleep_ms
import uasyncio as asyncio

from europi import knob_1, button_1, digital_1, digital_2, digital_3, digital_4

#from script_a import ScriptA
#from script_b import ScriptB
#etc...

# Register each script individually in the scripts list.
# This demonstrates 15 random example scripts.
scripts = []
for i in range(16):
    scripts.append(ExampleScript("Script " + str(i)))

SCRIPT_COUNT = len(scripts)

outputs = [digital_1, digital_2, digital_3, digital_4]


def display(choice: int):
  # Convert the choice into 4 bit binary used to show choice in the 4 digital out LEDs.
  b = bin(choice).replace('0b', '')
  while len(b) < 4:
      b = "0" + b
  # Convert each positional binary value into corresponding digital output LED value.
  for i, output in enumerate(outputs):
    output.value(int(b[i]))

  return b


def reset_display():
    for output in outputs:
        output.value(0)


# Main script execution.
async def main(script: any):
  # Display the selected script.
  print("Preparing to run {}".format(script.name))
  sleep_ms(500)
  # Execute script in main async loop.
  loop = asyncio.get_event_loop()
  loop.create_task(script.run())
  loop.run_forever()


# Bootloader script selection.
while True:
  choice = int((knob_1.percent() - 0.001) * SCRIPT_COUNT)
  b = display(choice)
  
  # Debug logging.
  print("choice: {} display: {} button: {}".format(choice, b, button_1.pin.value()))

  # If button 1 is pressed, execute the currently selected script.
  if button_1.pin.value() == 0:
    reset_display()
    try:
      # Execute the main loop with the currently selected script.
      asyncio.run(main(scripts[choice]))
    finally:
      # This line will stop previous run() method. Use this if entering bootloader from button press sequence.
      asyncio.new_event_loop()
  
  sleep_ms(100)