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# 1.24 USART Driver Synchronous - USART Multi Instance

This example echoes the received characters over the two consoles using the USART driver in synchronous mode.

## Description

This example uses the USART driver in synchronous mode in both Bare-Metal and RTOS environments to communicate over two consoles. It receives and echoes back the characters entered by the user on the respective console.

## 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/sync/usart_multi_instance/firmware.

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

Project Name | Description
--- | ---
sam_c21n_xpro_freertos.X | MPLABX project for SAMC21N Xplained Pro Evaluation Kit

## Setting Up the Hardware

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

Project Name | Description
--- | ---
sam_c21n_xpro_freertos.X | SAMC21N Xplained Pro Evaluation Kit

### Setting Up SAMC21N Xplained Pro Evaluation Kit

- To run the application, following additional hardware are required
  - mikroBUS Xplained Pro board
  - USB UART click board
- Connect the mikroBUS Xplained Pro board to the EXT1 header
- Install an USB UART click board on to the mikroBUS Xplained Pro board
- Connect the Debug USB port on the board to the computer using a micro USB cable

## Running the Application

1. Open the Terminal application (Ex.:Tera term) on the computer.
2. Connect to the EDBG/Jlink 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 two consoles as shown below:
   - If success the 10 characters typed are echoed back and an LED toggles on each time 10 characters are echoed
   - Console 1
   - Console 2

Refer to the following table for LED name:

Board | LED Name
--- | ---
SAMC21N Xplained Pro Evaluation Kit | LED0