【Luckfox Pico Ultra W】无法通过PWM引脚控制LED灯

• hartvon

  Posts: 6

  Joined: 2025-06-01 23:52

  2025-06-27 15:31

  Hello, Luckfox 团队:
  
  我正在测试通过PWM引脚控制LED，注意到Pico Ultra W设备上似乎只有一个LED电源灯。
  运行示例 控制PWM（Python程序），没看到明显的LED灯呼吸效果。
  使用自己的程序（控制LED灯常亮），也看不到期望的效果，如下是我的程序：

  Code: Select all

  from periphery import PWM
  import time
  
  pwm = PWM(10, 0)
  
  try:
      # Configure PWM for constant on
      pwm.frequency = 1000      # Frequency (not critical for constant on)
      pwm.duty_cycle = 1.0      # 100% duty cycle = fully on
      pwm.polarity = "normal"   # Normal polarity
      pwm.enable()             # Enable PWM output
  
      print("LED is now constantly on at full brightness")
      print("Press Ctrl+C to exit")
  
      while True:
          time.sleep(1)  # Keep program running
  
  except KeyboardInterrupt:
      print("\nTurning off LED...")
  
  finally:
      # Cleanup
      pwm.duty_cycle = 0  # Turn off LED
      pwm.close()
  

  - 板子型号：Luckfox Pico Ultra W
  - 镜像类型：Luckfox_Pico_Ultra_W_EMMC_0429
  
  想请问下问题出现了哪里，是需要增加额外的LED灯，还是需要使用其他的PWM引脚，期待您的答复！

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