UDMA Memcpy Polling

Table of Contents

• Introduction
• Supported Combinations
• Steps to Run the Example
• See Also
• Sample Output

Introduction

This example performs UDMA block copy transfer using Type 15 Transfer Record (TR15) using Transfer Record Packet Descriptor (TRPD) in polling mode.

The application opens and configures a BCDMA channel using SysConfig. Then the application prepares a TRPD for a 1D transfer from source to destination buffer, submits the request to DMA, waits for the DMA to complete by polling the channels's completion ring accelerator (RA).

Once the transfer it completes, it does cache operation for data coherency and compares the source and destination buffers for any data mismatch.

Supported Combinations

Attention

A53 NORTOS, A53 FREERTOS and A53 FREERTOS SMP support is experimental and is NOT supported by TI.

Parameter	Value
CPU + OS	r5fss0-0 freertos
	r5fss0-0 nortos
	a53ss0-0 nortos
	a53ss0-0 freertos
	a53ss0-0 freertos-smp
Toolchain	ti-arm-clang
	arm.gnu.aarch64-none
Board	am64x-evm
Example folder	examples/drivers/udma/udma_memcpy_polling

Steps to Run the Example

• When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
• When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run

See Also

UDMA

Sample Output

Shown below is a sample output when the application is run,

[UDMA] Memcpy application started ...
All tests have passed!!