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rmt: update ir example to work with esp32s3 out of box

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morris 2021-11-30 18:03:00 +08:00
parent 815203f401
commit ed1fe1d5ba
3 changed files with 29 additions and 16 deletions
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28
examples/peripherals/rmt/ir_protocols/README.md
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@ -1,3 +1,5 @@
| Supported Targets | ESP32 | ESP32-S2 | ESP32-C3 | ESP32-S3 |
| ----------------- | ----- | -------- | -------- | -------- |
# IR Protocol Example
(See the README.md file in the upper level 'examples' directory for more information about examples.)
@ -12,31 +14,33 @@ The example supports building and parsing both normal and extended NEC/RC5 proto
### Hardware Required
* A development board with ESP32 SoC (e.g. ESP32-DevKitC or ESP-WROVER-KIT)
* A development board with supported SoC mentioned in the above `Supported Targets` table
* An USB cable for power supply and programming
* A 5mm infrared LED (e.g. IR333C) used to transmit encoded IR signals
* An infrared receiver module (e.g. IRM-3638T), which integrates a demodulator and AGC circuit.
Example connection :
| ESP32 | IR333C | IRM-3638T |
| -------- | ------ | --------- |
| GPIO18 | Tx | × |
| GPIO19 | × | Rx |
| VCC 5V | √ | × |
| VCC 3.3V | × | √ |
| GND | GND | GND |
| ESP chip | IR333C | IRM-3638T |
| --------------------------- | ------ | --------- |
| CONFIG_EXAMPLE_RMT_TX_GPIO | Tx | × |
| CONFIG_EXAMPLE_RMT_RX_GPIO | × | Rx |
| VCC 5V | √ | × |
| VCC 3.3V | × | √ |
| GND | GND | GND |
### Configure the Project
Open the project configuration menu (`idf.py menuconfig`).
Open the project configuration menu (`idf.py menuconfig`).
In the `Example Configuration` menu:
* Select the infrared protocol used in the example under `Infrared Protocol` option.
* Set the GPIO number used for transmitting the IR signal under `RMT TX GPIO` option.
* Set the GPIO number used for receiving the demodulated IR signal under `RMT RX GPIO` option.
* Set the RMT TX channel number under `RMT TX Channel Number` option.
* Set the RMT RX channel number under `RMT RX Channel Number` option.
### Build and Flash
@ -44,11 +48,7 @@ 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 all the steps to configure and use the ESP-IDF to build projects.
* [ESP-IDF Getting Started Guide on ESP32](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/index.html)
* [ESP-IDF Getting Started Guide on ESP32-S2](https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/get-started/index.html)
* [ESP-IDF Getting Started Guide on ESP32-C3](https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/get-started/index.html)
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.
## Example Output

13
examples/peripherals/rmt/ir_protocols/main/Kconfig.projbuild
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@ -30,4 +30,17 @@ menu "Example Configuration"
default 19
help
Set the GPIO number used for receiving the RMT signal.
config EXAMPLE_RMT_TX_CHANNEL
int "RMT TX Channel Number"
default 0
help
Set the RMT TX channel number.
config EXAMPLE_RMT_RX_CHANNEL
int "RMT RX Channel Number"
default 4 if IDF_TARGET_ESP32S3
default 2
help
Set the RMT RX channel number.
endmenu

4
examples/peripherals/rmt/ir_protocols/main/ir_protocols_main.c
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@ -17,8 +17,8 @@
static const char *TAG = "example";
static rmt_channel_t example_tx_channel = RMT_CHANNEL_0;
static rmt_channel_t example_rx_channel = RMT_CHANNEL_2;
static rmt_channel_t example_tx_channel = CONFIG_EXAMPLE_RMT_TX_CHANNEL;
static rmt_channel_t example_rx_channel = CONFIG_EXAMPLE_RMT_RX_CHANNEL;
/**
* @brief RMT Receive Task