A Pwm object already exists for this
时间: 2024-05-07 15:20:53 浏览: 10
This error message usually indicates that you are trying to create a new PWM object when one already exists for the pin you are using. To fix this, you can either delete the existing PWM object or reuse it instead of creating a new one.
Here's an example code snippet that demonstrates how to check if a PWM object already exists for a pin before creating a new one:
```python
import machine
# Define the pin number
pwm_pin = machine.Pin(5)
# Check if a PWM object already exists for the pin
if not hasattr(pwm_pin, 'pwm'):
# Create a new PWM object
pwm = machine.PWM(pwm_pin)
else:
# Reuse the existing PWM object
pwm = pwm_pin.pwm
```
In this example, we first create a Pin object for the pin we want to use for PWM. We then use the `hasattr()` function to check if the Pin object already has a `pwm` attribute. If it doesn't, we create a new PWM object for the pin. If it does, we reuse the existing PWM object instead of creating a new one.