1.6 DMAC USART Echo
This example application demonstrates USART transfer with DMA to receive 10 bytes and echo back the received bytes.
Description
This application demonstrates USART transfer with DMA using SERCOM peripheral configured in USART mode. One DMA channel is used to receive 10 bytes of data from the USART and another DMA channel is used to echo back the received bytes.
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.
Path of the application within the repository is apps/dmac/dmac_usart_echo.
To build the application, refer to the following table and open the project using its IDE.
| Project Name | Description |
|---|---|
| pic32wm_bw1_curiosity.X | MPLAB X project for PIC32WM-BW1 Curiosity board |
Setting Up the Hardware
The following table shows the target hardware for the application projects.
| Project Name | Board |
|---|---|
| pic32wm_bw1_curiosity.X | PIC32WM-BW1 Curiosity board |
Setting Up PIC32WM-BW1 Curiosity Board
- Connect the USB port on the board to the computer using a USB Type-C cable
Running the Application
- Open the Terminal application (E.g., Tera term) on the computer.
- Connect to the USB 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 10 characters will be echoed back and the LED is toggled.
Refer to the following table for LED name:
| Board | LED Name |
|---|---|
| PIC32WM-BW1 Curiosity board | Green LED |