This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

CSK6 dma memory copy

Overview

This sample demonstrates how to use CSK6 dma(working in Memory to Memory mode) to perform a memcpy()-like manner. And give a speed comparison between in standard lib memcpy() and dma copy.

Building and Running

Make sure you have the CSK6 connected over Jlink debuger.

The sample can be built and flashed as follows:

west build -b csk6 samples/boards/csk6/dma_memcpy
west flash

Sample Output

To check output of this sample, any serial console program can be used (i.e. on Linux minicom, putty, screen, etc) This example uses minicom on the serial port /dev/ttyUSB0:

$ minicom -D /dev/ttyUSB0 -b 115200

*** Booting Zephyr OS build 60a5bbd0f655  ***

DMA copy start
DMA copy cost time: 204 us
DMA copy finish

STD memcpy start
STD memecpy cost time: 170 us
STD memcpy finish

DMA copy start
DMA copy cost time: 112 us
DMA copy finish

STD memcpy start
STD memecpy cost time: 164 us
STD memcpy finish

DMA copy start
DMA copy cost time: 104 us
DMA copy finish

STD memcpy start
STD memecpy cost time: 164 us
STD memcpy finish