37 lines
880 B
Python
37 lines
880 B
Python
# SPDX-FileCopyrightText: 2021 Jeff Epler, written for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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#
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# Adapted from the example https://github.com/raspberrypi/pico-examples/tree/master/pio/hello_pio
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import time
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import board
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import rp2pio
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import adafruit_pioasm
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hello = """
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.program hello
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loop:
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pull
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out pins, 1
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; This program uses a 'jmp' at the end to follow the example. However,
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; in a many cases (including this one!) there is no jmp needed at the end
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; and the default "wrap" behavior will automatically return to the "pull"
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; instruction at the beginning.
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jmp loop
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"""
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assembled = adafruit_pioasm.assemble(hello)
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sm = rp2pio.StateMachine(
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assembled,
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frequency=2000,
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first_out_pin=board.LED,
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)
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print("real frequency", sm.frequency)
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while True:
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sm.write(bytes((1,)))
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time.sleep(0.5)
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sm.write(bytes((0,)))
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time.sleep(0.5)
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