FLEXCOM USART Blocking

This example application shows how to use the FLEXCOM module in USART mode.

Parent topic:Harmony 3 Peripheral Library Application Examples for SAMA5D2 Family

Description

This application configures the FLEXCOM peripheral in USART mode and performs read
and write operation in a blocking manner. The CPU polls the peripheral register
continuously to manage the transfer. It receives a line of 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/flexcom/usart/flexcom_usart_echo_blocking/firmware.

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

Setting Up AT91Bootstrap Loader

To load the application binary onto the target device, we need to use at91bootstrap
loader. Refer to the at91bootstrap loader documentation for
details on how to configure, build and run bootstrap loader project and use it to
bootstrap the application binaries.

Setting Up the Hardware

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

Setting Up SAMA5D29 Curiosity Development Board

ADDITIONAL HARDWARE REQUIRED

• USB UART click board

SETTING UP THE BOARD

• Connect the Debug USB port on the board to the computer using a Type-C USB cable

• Connect USB UART click board to SAM A5D29 Curiosity board as per below Pin Connections

  SAM A5D29 Curiosity Development board Pins	USB UART click board Pins
  PIN 5, J8 connector	RX
  PIN 4, J8 connector	TX
  PIN 7, mikroBUS1 connector	3.3V
  PIN 1, J8 connector	GND

• Connect the Mini USB connector on the USB UART click board to the computer using a Mini USB cable

Running the Application

1. Build the application using its IDE

2. Open the Terminal application (Ex.:Tera term) on the computer.

3. Connect to the Virtual COM port and configure the serial settings as follows:

   • Baud : 115200
   • Data : 8 Bits
   • Parity : None
   • Stop : 1 Bit
   • Flow Control : None

4. The console displays the following message

   

5. Type a line of characters and press the Enter key

   Note: Number of characters entered before pressing enter key must be less than 256.

6. Entered line will be echoed back and the LED is toggled

The following table provides the LED name: