1.10 DMAC Linked List Transfer
This example application demonstrates how to use the DMA peripheral to copy multiple blocks of memory using DMA linked lists.
Description
The application demonstrates transfer of data from three separate blocks of memory (defined as three separate “source” arrays) into a single block (destination array) using DMA linked lists. Three linked lists descriptors are chained together to perform the transfer. A software trigger initiates the data transfer. Interrupt is generated when the transfer is complete. Application verifies the data in the destination buffer and prints the status on the serial console.
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/dma/dma_linked_list_transfer/firmware.
To build the application, refer to the following table and open the project using its IDE.
| Project Name | Description |
|---|---|
| pic32cz_ca80_curiosity_ultra.X | MPLABX project for PIC32CZ CA80 Curiosity Ultra Board |
Setting Up the Hardware
The following table shows the target hardware for the application projects.
| Project Name | Board |
|---|---|
| pic32cz_ca80_curiosity_ultra.X | PIC32CZ CA80 Curiosity Ultra Board |
Setting Up PIC32CZ CA80 Curiosity Ultra Board
- Connect the Debug USB port on the board to the computer using a micro USB cable
Running the Application
- Build and Program the application using its IDE
- Connect to the PKOB4 Virtual COM port and configure the serial settings as
follows:
- Baud : 115200
- Data : 8 Bits
- Parity : None
- Stop : 1 Bit
- Flow Control : None
- The transfer status is printed on the serial console:
