DMAC usart echo using Pattern Matching

This example application demonstrates USART echo using DMA pattern matching feature.

Description

This application demonstrates USART transfer with DMA in pattern matching mode. DMA transmit and receive continously happen until a given pattern is matched. During receive, when pattern is matched, reception stops. similarly during transmit, when buffer matches the pattern, transmission stops.

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/dmac/dmac_usart_pattern_matching/firmware .

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

Setting up the hardware

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

Setting up PIC32MZ Embedded Connectivity with FPU (EF) Starter Kit

• Connect mini USB cables from the ‘Debug USB’ and ‘USB-to-UART’ connectors on the board to the computer

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. Following message is output on console:

   

5. Type less than 10 characters in the terminal followed by “Enter” key. Typed characters will be echoed back and LED toggles.

The following table provides the LED name:

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