26 lines
761 B
Python
Executable File
26 lines
761 B
Python
Executable File
#!/usr/bin/python
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# From https://raspberry.tips/en/raspberrypi-tutorials/raspberry-pi-gpio-python
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import lgpio
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import time
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# Open GPIO chip (0 = /dev/gpiochip0, on Pi 5 gpiochip4 also possible)
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h = lgpio.gpiochip_open(0)
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# Hardware PWM on GPIO18 (pin 12) must be PWM-capable
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pwm_pin = 18
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pwm_freq = 1000
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try:
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while True:
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for pwm_level in range(0,100):
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lgpio.tx_pwm(h, pwm_pin, pwm_freq, pwm_level)
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pwm_level += 10
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time.sleep(0.05)
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for pwm_level in range(100,0,-1):
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lgpio.tx_pwm(h, pwm_pin, pwm_freq, pwm_level)
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pwm_level += 10
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time.sleep(0.05)
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finally:
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lgpio.tx_pwm(h, pwm_pin, 0, 0) # Stop PWM
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lgpio.gpiochip_close(h) # Always close!
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