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History

Frantisek Hrbata 1c92945f59 change(examples): switch examples to use a minimal build

Currently, several example dependencies rely on the fact that all
registered components are added to the build, along with components
specified in common requirements. This results in longer build times
because even unused components must be built. Switch all examples to use
idf_minimal_build to compile only the components actually required by
the example.

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>

2024-11-20 20:14:40 +01:00

main

change(examples): explicitly specify component dependencies for examples

2024-11-20 14:11:24 +01:00

CMakeLists.txt

change(examples): switch examples to use a minimal build

2024-11-20 20:14:40 +01:00

pytest_servo_mg996r.py

ci(esp32c5): enable c5 target test

2024-07-02 16:45:49 +08:00

README.md

remove(c5beta3): remove c5 beta3 doxy files

2024-06-17 12:02:15 +08:00

README.md

Supported Targets	ESP32	ESP32-C5	ESP32-C6	ESP32-H2	ESP32-P4	ESP32-S3

MCPWM RC Servo Control Example

(See the README.md file in the upper level 'examples' directory for more information about examples.)

This example illustrates how to drive a typical RC Servo by sending a PWM signal using the MCPWM driver. The PWM pulse has a frequency of 50Hz (period of 20ms), and the active-high time (which controls the rotation) ranges from 0.5s to 2.5ms with 1.5ms always being center of range.

How to Use Example

Hardware Required

A development board with any Espressif SoC which features MCPWM peripheral (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
A USB cable for Power supply and programming
A RC servo motor, e.g. SG90

Connection :

      ESP Board              Servo Motor      5V
+-------------------+     +---------------+    ^
|  SERVO_PULSE_GPIO +-----+PWM        VCC +----+
|                   |     |               |
|               GND +-----+GND            |
+-------------------+     +---------------+

Note that, some kind of servo might need a higher current supply than the development board usually can provide. It's recommended to power the servo separately.

Build and Flash

Run idf.py -p PORT flash monitor to build, flash and monitor the project.

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Output

Run the example, you will see the following output log:

...
I (0) cpu_start: Starting scheduler on APP CPU.
I (305) example: Create timer and operator
I (305) example: Connect timer and operator
I (305) example: Create comparator and generator from the operator
I (315) gpio: GPIO[44]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
I (325) example: Set generator action on timer and compare event
I (335) example: Enable and start timer
I (335) example: Angle of rotation: 0
I (1345) example: Angle of rotation: 2
I (2345) example: Angle of rotation: 4
I (3345) example: Angle of rotation: 6
I (4345) example: Angle of rotation: 8
I (5345) example: Angle of rotation: 10
I (6345) example: Angle of rotation: 12
I (7345) example: Angle of rotation: 14
I (8345) example: Angle of rotation: 16
I (9345) example: Angle of rotation: 18
...

The servo will rotate from -60 degree to 60 degree, and then turn back again.

Troubleshooting

For any technical queries, please open an [issue] (https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.