Merge branch 'doc/rmt_example_doc_improve' into 'master'

doc(rmt): update README.md file of rmt related example.

See merge request idf/esp-idf!2636

examples/peripherals/rmt_nec_tx_rx/README.md

@@ -1,8 +1,80 @@
-# Example: rmt_nec_tx_rx
+# _RMT NEC_TX_RX Example_
+
+(See the README.md file in the upper level 'examples' directory for more information about examples.)
 
 This example uses the remote control (RMT) peripheral to transmit and receive codes for the NEC infrared remote protocol.
 
-Configuration (pin numbers, etc.) can be modified in top of the main/infrared_nec_main.c file.
+## How to Use Example
 
-By default, this example runs a self test which assumes the TX and RX GPIO pins are connected together. To disable this, comment RMT_RX_SELF_TEST in infrared_nec_main.c.
+### Hardware Required
 
+* A development board with ESP32 SoC (e.g., ESP32-DevKitC, ESP-WORVER-KIT, etc.)
+* A USB cable for Power supply and programming
+
+By default, this example runs a self test which assumes the TX pin (GPIO18) and RX pin (GPIO19) are _connected together_. 
+
+To disable self-test mode, comment out RMT_RX_SELF_TEST in infrared_nec_main.c, after which, you need to connect a IR transmitter and a receiver to GPIO18 and GPIO19. 
+
+The TX pin and RX pin can be modified in top of the main/infrared_nec_main.c file.
+
+```
+#define RMT_TX_GPIO_NUM  18     /*!< GPIO number for transmitter signal */
+#define RMT_RX_GPIO_NUM  19     /*!< GPIO number for receiver */
+```
+
+### Configure the Project
+
+```
+make menuconfig
+```
+
+* Set serial port under Serial Flasher Options.
+
+### Build and Flash
+
+Build the project and flash it to the board, then run monitor tool to view serial output:
+
+```
+make -j4 flash monitor
+```
+
+(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 this example, you will see the following output log:
+```
+NEC: RMT TX DATA
+NEC: RMT RCV --- addr: 0xee11 cmd: 0xff00
+NEC: RMT RCV --- addr: 0xed12 cmd: 0xfe01
+NEC: RMT RCV --- addr: 0xec13 cmd: 0xfd02
+NEC: RMT RCV --- addr: 0xeb14 cmd: 0xfc03
+NEC: RMT RCV --- addr: 0xea15 cmd: 0xfb04
+NEC: RMT RCV --- addr: 0xe916 cmd: 0xfa05
+NEC: RMT RCV --- addr: 0xe817 cmd: 0xf906
+NEC: RMT RCV --- addr: 0xe718 cmd: 0xf807
+NEC: RMT RCV --- addr: 0xe619 cmd: 0xf708
+NEC: RMT RCV --- addr: 0xe51a cmd: 0xf609
+NEC: RMT RCV --- addr: 0xe41b cmd: 0xf50a
+NEC: RMT RCV --- addr: 0xe31c cmd: 0xf40b
+NEC: RMT RCV --- addr: 0xe21d cmd: 0xf30c
+NEC: RMT RCV --- addr: 0xe11e cmd: 0xf20d
+NEC: RMT RCV --- addr: 0xe01f cmd: 0xf10e
+NEC: RMT RCV --- addr: 0xdf20 cmd: 0xf00f
+NEC: RMT RCV --- addr: 0xde21 cmd: 0xef10
+NEC: RMT RCV --- addr: 0xdd22 cmd: 0xee11
+NEC: RMT RCV --- addr: 0xdc23 cmd: 0xed12
+NEC: RMT RCV --- addr: 0xdb24 cmd: 0xec13
+NEC: RMT RCV --- addr: 0xda25 cmd: 0xeb14
+```
+
+## Troubleshooting
+
+* Programming fail
+
+    * Hardware connection is not correct: run `make monitor`, and reboot your board to see if there is any output logs.
+    * The baud rate for downloading is too high: lower your baud rate in the `menuconfig` menu, and try again.
+
+For any technical queries, please open an [issue] (https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.

examples/peripherals/rmt_tx/README.md

@@ -1,12 +1,18 @@
-# RMT Transmit Example
+# _RMT Transmit Example_
 
-This example shows how to configure and operate the remote control (RMT) peripheral to transmit a sample message in the [Morse code](https://en.wikipedia.org/wiki/Morse_code).
+(See the README.md file in the upper level 'examples' directory for more information about examples.)
 
-Configuration (pin number, etc.) can be modified in the top of the `main/rmt_tx_main.c` file.
+This example will shows how to configure and operate the remote control (RMT) peripheral to transmit a sample message in the [Morse code](https://en.wikipedia.org/wiki/Morse_code), it also shows how to transmit custom format of data.
 
-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 GPIO configured under `RMT_TX_GPIO` define (default is GPIO 18).
+## How to Use Example
 
-Example connections:
+### Hardware Required
+
+* 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     
@@ -21,5 +27,41 @@ GPIO18 +----/\/\/\----+------|>|-----+ GND
                       +--------------+ GND
 ```
 
+### Configure the Project
 
-See the README.md file in the upper level 'examples' directory for more information about examples.
+```
+make menuconfig
+```
+
+* Set serial port under Serial Flasher Options.
+
+### Build and Flash
+
+Build the project and flash it to the board, then run monitor tool to view serial output:
+
+```
+make -j4 flash monitor
+```
+
+(To exit the serial monitor, type ``Ctrl-]``.)
+
+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
+
+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`).
+
+Run this example, you will see the following output log:
+```
+RMT Tx: Transmission complete
+RMT Tx: Sample transmission complete
+```
+
+## Troubleshooting
+
+* Programming fail
+
+    * Hardware connection is not correct: run `make monitor`, and reboot your board to see if there is any output logs.
+    * The baud rate for downloading is too high: lower your baud rate in the `menuconfig` menu, and try again.
+
+For any technical queries, please open an [issue] (https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.