EDMA Chain Transfer

Table of Contents

• Introduction
• Supported Combinations
• Using SDK with SysConfig
• Steps to Run the Example
• Sample Output

Introduction

This example performs EDMA transfer test using chain mode.

• In chain transfer mode completion of one transfer automatically sets the event for another channel.
• The PaRAM set is initialized with two channels and provides a synchronization event (or trigger) to the chained DMA channel, as soon as the transfer (final or intermediate) completes on the main DMA/QDMA channel.This example uses AB Synchronized transfer mode.
• The source memory is initialized with sample data and destination memory is initialized with zeroes for validation.
• When a chained completion code is detected, the value of which is dictated by the transfer completion code of the PaRAM set associated with the channel, Intermediate and final transfer interrupts are enabled and the transfer completion interrupt status is polled to determine if the status is set before giving next trigger.

Supported Combinations

Parameter	Value
CPU + OS	m4fss0-0 freertos
	m4fss0-0 nortos
Toolchain	ti-arm-clang
Boards	xWRL6432-evm
Example folder	examples/drivers/edma/edma_chain_transfer/

Using SDK with SysConfig

A GUI tool SysConfig is used to configure different modules and peripherals of the example. Using this tool, users can select and customize different modules and peripherals. The SysConfig tool will generate the code for initializing and configuring these modules. This configuration is saved to a file called example.syscfg for every example. To know more about how to use SDK with SysConfig, Visit this page

Using SDK with SysConfig

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

Sample Output

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

[EDMA] Chain Transfer Test Started...
[EDMA] Chain Transfer Test Completed!!
All tests have passed!!