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64 lines
2.1 KiB
Markdown
64 lines
2.1 KiB
Markdown
# _LEDC Fade Example_
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(See the README.md file in the upper level 'examples' directory for more information about examples.)
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This example shows how to control intensity of LEDs using selected SoC's on-board hardware LED PWM Controller module.
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## How to use example
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### Hardware Required
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* A development board with any Espressif SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
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* A USB cable for power supply and programming
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Connect four LEDs to the following LEDC channels / individual GPIOs:
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| | Channel 0 | Channel 1 | Channel 2 | Channel 3 |
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| --------------- | --------- | --------- | --------- | --------- |
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| ESP32 | GPIO18 | GPIO19 | GPIO4 | GPIO5 |
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| All other chips | GPIO8 | GPIO9 | GPIO4 | GPIO5 |
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### Configure the project
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```
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idf.py menuconfig
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```
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### Build and Flash
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Build the project and flash it to the board, then run the monitor tool to view the serial output:
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Run `idf.py -p PORT flash monitor` to build, flash and monitor the project.
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html) for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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Running this example, you will see each ledc's brightness changes differently
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* LEDC 1: Fade up / increase intensity
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* LEDC 2: Fade down / decrease intensity
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* LEDC 3: Keep a stable intensity
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* LEDC 4: LED is not on
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you can also see the following output log on the serial monitor:
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```
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1. LEDC fade up to duty = 4000
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2. LEDC fade down to duty = 0
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3. LEDC set duty = 4000 without fade
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4. LEDC set duty = 0 without fade
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...
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```
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## Troubleshooting
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* Programming fail
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* Hardware connection is not correct: run `idf.py -p PORT monitor`, and reboot your board to see if there are any output logs.
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* The baud rate for downloading is too high: lower your baud rate in the `menuconfig` menu, and try again.
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For any technical queries, please open an [issue](https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.
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