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

examples/peripherals/rmt/ir_protocols/README.md

@@ -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
 

examples/peripherals/rmt/ir_protocols/main/Kconfig.projbuild

@@ -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

examples/peripherals/rmt/ir_protocols/main/ir_protocols_main.c

@@ -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