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# 1.17 USART Driver Asynchronous - USART Echo

This example echoes the received characters over the console using the USART driver in Asynchronous mode.

## Description

This example uses the USART driver in Asynchronous mode in Bare-Metal environment to communicate over the console. It receives and echoes back the characters entered by the user.

## Downloading and Building the Application

To clone or download this application from GitHub, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/driver/usart/async/usart_echo/firmware.

To build the application, refer to the following table and open the project using its IDE.

Project Name | Description
--- | ---
pic32mk_gp_db.X | MPLAB X project for PIC32MK GP Development Kit
pic32mk_mcj_curiosity_pro.X | MPLAB X project for PIC32MK MCJ Curiosity Pro Development Board
pic32mk_mcm_curiosity_pro.X | MPLAB X project for PIC32MK MCM Curiosity Pro Development Board
pic32mk_mca_curiosity_pro.X | MPLAB X project for PIC32MK MCA Curiosity Pro Development Board

## Setting Up the Hardware

The following table shows the target hardware for the application projects.

Project Name | Description
--- | ---
pic32mk_gp_db.X | PIC32MK GP Development Kit
pic32mk_mcj_curiosity_pro.X | PIC32MK MCJ Curiosity Pro Development Board
pic32mk_mcm_curiosity_pro.X | PIC32MK MCM Curiosity Pro Development Board
pic32mk_mca_curiosity_pro.X | PIC32MK MCA Curiosity Pro Development Board

### Setting Up PIC32MK GP Development Kit

- Connect micro USB cable to the Debug USB connector (J12) on the board to the computer
- Connect a micro USB cable to the USART-USB port J25. This will enumerate as a COM port on the PC.

### Setting Up PIC32MK MCJ Curiosity Pro Development Board

- Connect micro USB cable to the Debug USB connector (J1) on the board to the computer. This will enumerate as a COM port on the PC.

### Setting Up PIC32MK MCM Curiosity Pro Development Board

- Connect a micro USB cable to the USB DEBUG port J500
- Connect a micro USB cable to the USB to UART port J400. This will enumerate as a COM port on the PC.

### Setting Up PIC32MK MCA Curiosity Pro Development Board

- Connect micro USB cable to the Debug USB connector (J1) on the board to the computer. This will enumerate as a COM port on the PC.

## Running the Application

1. Open the Terminal application (e.g., Tera Term) on the computer.
2. Connect to the EDBG Virtual COM port and configure the serial settings as follows:
   - Baud: 115200
   - Data: 8 Bits
   - Parity: None
   - Stop: 1 Bit
   - Flow Control: None
3. Build and program the application using its IDE.
4. Type a character and observe the output on the console as shown below:
5. LED toggles each time the character is echoed.

Refer to the following table for LED name:

Board | LED Name
--- | ---
PIC32MK GP Development Kit | LED1
PIC32MK MCJ Curiosity Pro Development Board | LED1
PIC32MK MCM Curiosity Pro Development Board | LED2
PIC32MK MCA Curiosity Pro Development Board | LED1

Rev: D