alex/esp-idf
alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2024-10-05 20:47:46 -04:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity
c26bfae1fd
esp-idf/examples/peripherals/rmt/dshot_esc
History
Djordje Nedic facab8c5a7 tools: Increase the minimal supported CMake version to 3.16 
This updates the minimal supported version of CMake to 3.16, which in turn enables us to use more CMake features and have a cleaner build system.
This is the version that provides most new features and also the one we use in our latest docker image for CI.
2022-06-01 06:35:02 +00:00
..
main example: added dshot esc example based on new rmt driver 2022-05-07 10:34:50 +00:00
CMakeLists.txt tools: Increase the minimal supported CMake version to 3.16 2022-06-01 06:35:02 +00:00
pytest_dshot_esc.py example: added dshot esc example based on new rmt driver 2022-05-07 10:34:50 +00:00
README.md example: added dshot esc example based on new rmt driver 2022-05-07 10:34:50 +00:00

README.md

Supported Targets ESP32 ESP32-S2 ESP32-C3 ESP32-S3

RMT Infinite Loop Transmit Example -- Dshot ESC (Electronic Speed Controller)

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

RMT TX channel can transmit symbols in an infinite loop, where the loop is totally controlled by the hardware. This feature is useful for scenarios where a device needs continuous stimulus.

The DShot is a digital protocol between flight controller (FC) and ESC, which is more resistant to electrical noise than traditional analog protocols. The DShot protocol requires the FC to encode throttle information into pulses with various durations and send out the pulses periodically. This is what an RMT TX channel can perfectly do.

How to Use Example

Hardware Required

  • A development board with any supported Espressif SOC chip (see Supported Targets table above)
  • A USB cable for Power supply and programming
  • An ESC that supports DShot protocol (this example will take the DShot300 as an example)

Connection :

   BLDC           DShot ESC        12V GND
+--------+     +---------------+    |   |           ESP
|        |     |               |    |   | +----------------------+
|      U +-----+ U          P+ +----+   | |                      |
|        |     |               |        | |                      |
|      V +-----+ V          P- +--------+ |                      |
|        |     |               |          |                      |
|      W +-----+ W         SIG +----------+ DSHOT_ESC_GPIO_NUM   |
|        |     |           GND +----------+ GND                  |
+--------+     +---------------+          +----------------------+

The GPIO number used in this example can be changed according to your board, by the macro DSHOT_ESC_GPIO_NUM defined in the source file.

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.

Console Output

I (0) cpu_start: Starting scheduler on APP CPU.
I (182) example: Create RMT TX channel
I (182) gpio: GPIO[43]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
I (182) example: Install Dshot ESC encoder
I (182) example: Start RMT TX channel
I (182) example: Start ESC by sending zero throttle for a while...
I (3182) example: Set throttle to 1000, no telemetry

The BLDC motor will beep when the ESC receives a burst of initialization pulses. And then starts high-speed rotation at the throttle set in the code.

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.