1.37 SERCOM USART Interrupt
This example application demonstrates how to use the SERCOM peripheral in USART mode to transfer 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/sercom/usart/usart_echo_interrupt/firmware.
To build the application, refer to the following table and open the project using its IDE.
| Project Name | Description |
|---|---|
| sam_c21n_xpro.X | MPLABX project for SAMC21N Xplained Pro Evaluation Kit |
| sam_c21n_xpro_keil/sam_c21n_xpro_keil.uvprojx | KEIL 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.X | SAMC21N Xplained Pro Evaluation Kit |
| sam_c21n_xpro_keil/sam_c21n_xpro_keil.uvprojx | SAMC21N Xplained Pro Evaluation Kit |
Setting Up SAMC21N Xplained Pro Evaluation Kit
- Connect the Debug USB port on the board to the computer using a micro USB cable
Running the Application
- Open the Terminal application (Ex.:Tera term) on the computer
- 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
- Build and Program the application using its IDE
- The console displays the following message
- Type 10 characters in the console
- Entered characters will be echoed back and the LED is toggled
| Board | LED Name |
|---|---|
| SAMC21N Xplained Pro Evaluation Kit | LED0 |