1.29 UART Echo Interrupt

This example application demonstrates how to use the UART peripheral to transfer a block of data in a non-blocking manner.

Description

This example shows the read and write operation over a UART in a non-blocking manner. The peripheral interrupt is used to manage the transfer. It receives 10 characters from the terminal window and echoes them back.

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/uart/uart_echo_interrupt/firmware.

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

Project NameDescription
pic32mx470_curiosity.XMPLABX project for Curiosity PIC32MX470 Development Board
pic32mx_xlp_sk.XMPLABX project for PIC32MX274 XLP Starter Kit

Setting Up the Hardware

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

Project NameDescription
pic32mx470_curiosity.XCuriosity PIC32MX470 Development Board
pic32mx_xlp_sk.XPIC32MX274 XLP Starter Kit

Setting Up Curiosity PIC32MX470 Development Board

  • To run the demo, the following additional hardware are required:
  • Connect mini USB cable to the ‘Debug USB’ connector(J3) on the board to the computer
  • Install an USB UART click board on to the mikroBUS socket J5
  • Connect mini USB cable between PC and the USB UART click board
    Note: Ensure that the series resistors on the mikroBUS headers are of value 0 Ohms.

Setting Up PIC32MX274 XLP Starter Kit

Running the Application

  1. Open the Terminal application (Ex.:Tera term) on the computer
  2. Connect to the “USB to UART” 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 project using its IDE
  4. See the following message in the console:
  5. Type 10 characters in terminal
  6. Entered 10 characters is echoed back and LED is toggled
Following table provides the LED names:
BoardLED Name
Curiosity PIC32MX470 Development BoardLED1
PIC32MX274 XLP Starter KitLED1 (RED)