28 wiersze
823 B
Python
28 wiersze
823 B
Python
import time
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from rp2 import PIO, asm_pio
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from machine import Pin
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# Define the blink program. It has one GPIO to bind to on the set instruction, which is an output pin.
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# Use lots of delays to make the blinking visible by eye.
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@asm_pio(set_init=rp2.PIO.OUT_LOW)
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def blink():
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wrap_target()
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set(pins, 1) [31]
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nop() [31]
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nop() [31]
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nop() [31]
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nop() [31]
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set(pins, 0) [31]
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nop() [31]
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nop() [31]
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nop() [31]
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nop() [31]
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wrap()
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# Instantiate a state machine with the blink program, at 1000Hz, with set bound to Pin(25) (LED on the rp2 board)
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sm = rp2.StateMachine(0, blink, freq=1000, set_base=Pin(25))
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# Run the state machine for 3 seconds. The LED should blink.
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sm.active(1)
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time.sleep(3)
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sm.active(0) |