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Hou Wen Xiang 2018-07-15 12:56:23 +08:00
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examples/peripherals/rmt_tx/README.md
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@ -1,4 +1,4 @@
# _RMT Transmit Example_ # _RMT Transmit Example_
(See the README.md file in the upper level 'examples' directory for more information about examples.) (See the README.md file in the upper level 'examples' directory for more information about examples.)
@ -8,7 +8,24 @@ This example will shows how to configure and operate the remote control (RMT) pe
### Hardware Required ### Hardware Required
To run this example, you need to prepare a development board with esp32 SoC(e.g., ESP32_Core_board, ESP-WORVER_KIT etc), a LED, a speaker or an earphone and a USB cable for power supply and programming. * A development board with ESP32 SoC (e.g., ESP32-DevKitC, ESP-WORVER-KIT, etc.)
* A USB cable for Power supply and programming
* A LED, a speaker or an earphone
Connection :
```
330R LED
GPIO18 +----/\/\/\----+------|>|-----+ GND
|
| /|
+-+ | Speaker
| | | or
+-+ | earphone
| \|
|
+--------------+ GND
```
### Configure the Project ### Configure the Project
@ -34,20 +51,6 @@ See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/l
To be able to see and hear the message output by the RMT, connect a LED and a speaker or an earphone (be careful - it may be loud) to the GPIO18(the pin can be changed by modify the definition of `RMT_TX_GPIO` in `main/rmt_tx_main.c`). To be able to see and hear the message output by the RMT, connect a LED and a speaker or an earphone (be careful - it may be loud) to the GPIO18(the pin can be changed by modify the definition of `RMT_TX_GPIO` in `main/rmt_tx_main.c`).
```
330R LED
GPIO18 +----/\/\/\----+------|>|-----+ GND
|
| /|
+-+ | Speaker
| | | or
+-+ | earphone
| \|
|
+--------------+ GND
```
Run this example, you will see the following output log: Run this example, you will see the following output log:
``` ```
RMT Tx: Transmission complete RMT Tx: Transmission complete
@ -58,7 +61,7 @@ RMT Tx: Sample transmission complete
* Programming fail * Programming fail
* To check whether the hardware connection is correct, you can run `make monitor` and reboot your board to see if there are any output logs. * Hardware connection is not correct: run `make monitor`, and reboot your board to see if there is any output logs.
* Your download baud-rate is too high. please lower your download baud-rate in menuconfig and try again. * The baud rate for downloading is too high: lower your baud rate in the `menuconfig` menu, and try again.
If any problems that can't be resolved, please open an issue in GitHub(https://github.com/espressif/esp-idf/issues), we will reply to you soon. For any technical queries, please open an [issue] (https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.