USART driver asynchronous - USART echo
This example echoes the received characters over the console using the USART driver in asynchronous mode.
Description
This example uses the USART driver in asynchronous mode in Bare-Metal and RTOS environment to communicate over the console. It receives and echo’s back the characters entered by the user.
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_echo/firmware .
To build the application, refer to the following table and open the project using its IDE.
| Project Name | Description |
|---|---|
| sam_e70_xult.X | MPLABX project for SAM E70 Xplained Ultra Evaluation Kit |
| sam_e70_xult_freertos.X | MPLABX project for SAM E70 Xplained Ultra Evaluation Kit |
| sam_v71_xult.X | MPLABX project for SAM V71 Xplained Ultra Evaluation Kit |
| sam_v71_xult_freertos.X | MPLABX project for SAM V71 Xplained Ultra Evaluation Kit |
Setting up the hardware
The following table shows the target hardware for the application projects.
| Project Name | Board |
|---|---|
| sam_v71_xult.X sam_v71_xult_freertos.X | SAM V71 Xplained Ultra Evaluation Kit |
| sam_e70_xult.X sam_e70_xult_freertos.X | SAM E70 Xplained Ultra Evaluation Kit |
Setting up SAM E70 Xplained Ultra Evaluation Kit
- Connect the Debug USB port on the board to the computer using a micro USB cable
Setting up SAM V71 Xplained Ultra 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/Jlink 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
-
Type a character and observe the output on the console as shown below:
- LED toggles each time the character is echoed
Refer to the following table for LED name:
| Board | LED Name |
|---|---|
| SAM E70 Xplained Ultra Evaluation Kit | LED1 |
| SAM V71 Xplained Ultra Evaluation Kit | LED0 |