32 lines
1 KiB
Python
32 lines
1 KiB
Python
# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
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# SPDX-License-Identifier: MIT
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# Simple seesaw test for writing PWM outputs
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# On the SAMD09 breakout these are pins 5, 6, and 7
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# On the ATtiny8x7 breakout these are pins 0, 1, 9, 12, 13
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#
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# See the seesaw Learn Guide for wiring details.
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# For SAMD09:
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# https://learn.adafruit.com/adafruit-seesaw-atsamd09-breakout?view=all#circuitpython-wiring-and-test
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# For ATtiny8x7:
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# https://learn.adafruit.com/adafruit-attiny817-seesaw/pwmout
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import time
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import board
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from adafruit_seesaw import seesaw, pwmout
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ss = seesaw.Seesaw(board.I2C())
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PWM_PIN = 12 # If desired, change to any valid PWM output!
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led = pwmout.PWMOut(ss, PWM_PIN)
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delay = 0.01
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while True:
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# The API PWM range is 0 to 65535, but we increment by 256 since our
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# resolution is often only 8 bits underneath
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for cycle in range(0, 65535, 256): #
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led.duty_cycle = cycle
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time.sleep(delay)
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for cycle in range(65534, 0, -256):
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led.duty_cycle = cycle
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time.sleep(delay)
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