1.9 USART Driver Asynchronous - USART Multi Instance

This example application demonstrates the multi instance feature of the asynchronous mode of the USART driver.

Description

This example uses the USART driver in asynchronous mode to communicate over two UART consoles. It echoes 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/async/usart_multi_instance/firmware.

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

Project NameDescription
sam_d20_xpro.XMPLABX project for SAM D20 Xplained Pro Evaluation Kit

Setting Up the Hardware

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

Project NameDescription
sam_d20_xpro.XSAM D20 Xplained Pro Evaluation Kit

Running the Application

  1. Open the Terminal application (Ex.:Tera Term) on the computer for two COM ports.
  2. Configure the serial port settings as follows:
    • Baud : 115200
    • Data : 8 Bits
    • Parity : None
    • Stop : 1 Bit
    • Flow Control : None
  3. Build and program the application using the MPLAB X IDE.
  4. Type a character and observe the output on the two consoles as shown below:
    • If success the character typed echoes back and an LED toggles on each time the character is echoed.
    • Console 1
    • Console 2
Refer to the following table for LED name: