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Copy file name to clipboardExpand all lines: content/micropython/01.basics/05.digital-analog-pins/digital-analog-pins.md
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@@ -123,6 +123,8 @@ As a result, you can simulate a specific voltage written to a pin. In the exampl
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For this, we need to import `PWM` and `Pin` from the `machine` module.
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### Coding with PWM
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```python
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from machine import Pin, PWM, ADC
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@@ -134,3 +136,36 @@ pwm.freq(1000)
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whileTrue:
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pwm.duty_u16(duty)
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```
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In this example:
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-`Pin(15)` is attached to PWM
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-`duty` is set at 3000
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-`freq` is set at 1 Hz
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### PWM on the GIGA R1
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On STM32 boards like the [Arduino GIGA R1 WiFi](https://store.arduino.cc/products/giga-r1-wifi), PWM is handled differently. You need to use the `Timer` class along with the `Pin` class from the `pyb` module.
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Here's the correct code that works on these boards:
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```python
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from pyb import Pin, Timer
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p = Pin('A13') # Replace 'A13' with your desired PWM-capable pin
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tim = Timer(2, freq=1000)
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ch = tim.channel(1, Timer.PWM, pin=p)
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ch.pulse_width_percent(25)
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```
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In this example:
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-`p` is a `Pin` object initialized on pin `'A13'`. This pin is set up for PWM output.
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-`tim` is a `Timer` object initialized with timer number 2 and a frequency of 1000 Hz.
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-`ch` is a PWM channel created on timer 2, channel 1, and is associated with pin `p`.
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-`ch.pulse_width_percent(25)` sets the duty cycle of the PWM signal to 25%.
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-`'A13'` is marked as **DAC1** on the GIGA R1 WiFi
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- Pin names and timer configurations, may vary between different STM32 boards. For more information, check out the [GIGA R1 MicroPython Guide](https://docs.arduino.cc/tutorials/giga-r1-wifi/giga-micropython/).
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