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1 .. zephyr:code-sample:: pwm-blinky
3    :relevant-api: pwm_interface
11 :zephyr:code-sample:`blinky` for a GPIO-based sample.
15 seconds until it returns to 1 Hz, completing a single blinking cycle. This
16 faster-then-slower blinking cycle then repeats forever.
18 Some PWM hardware cannot set the PWM period to 1 second to achieve the blinking
19 frequency of 1 Hz. This sample calibrates itself to what the hardware supports
26 The board must have an LED connected to a PWM output channel. The PWM
28 <dt-guide>` alias, usually in the :ref:`BOARD.dts file
29 <devicetree-in-out-files>`.
34 No additional wiring is necessary if ``pwm_led0`` refers to hardware that is
35 already connected to an LED on the board.
39 .. list-table::
40    :header-rows: 1
42    * - Board
43      - Wiring
44    * - :zephyr:board:`nucleo_f401re`
45      - connect PWM2 (PA0) to an LED
46    * - :zephyr:board:`nucleo_l476rg`
47      - connect PWM2 (PA0) to an LED
48    * - :zephyr:board:`stm32f4_disco`
49      - connect PWM2 (PA0) to an LED
50    * - :zephyr:board:`nucleo_f302r8`
51      - connect PWM2 (PA0) to an LED
52    * - :zephyr:board:`nucleo_f103rb`
53      - connect PWM1 (PA8) to an LED
54    * - :zephyr:board:`nucleo_wb55rg`
55      - connect PWM1 (PA8) to an LED
56    * - :zephyr:board:`esp32_devkitc_wroom`
57      - connect GPIO2 to an LED
58    * - :zephyr:board:`esp32s2_saola`
59      - connect GPIO2 to an LED
60    * - :zephyr:board:`esp32c3_devkitm`
61      - connect GPIO2 to an LED
66 To build and flash this sample for the :ref:`nrf52840dk_nrf52840`:
68 .. zephyr-app-commands::
69    :zephyr-app: samples/basic/blinky_pwm
70    :board: nrf52840dk/nrf52840
77 prints information to the board's console.