MCASP Playback

Table of Contents

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

Introduction

This example demonstrates the McASP configured for an audio playback mode of operation. am273x-evm is used with am273x-evm daughter card. An audio source (e.g. cellphone with AUX cable) is connected to Line-In-1 of the daughter card and audio output device (e.g headphones) are connected to the Line-Out-4 of the daughter card. The audio signal from the source can be heard on a single channel at the output.

• Mcasp is configured in I2S mode
• Transfers data on single channel (left)

Supported Combinations

Parameter	Value
CPU + OS	c66ss0 nortos
Toolchain	ti-arm-clang, ti-c6000
Board	AM273x EVM + AM273x audio daughter card
Example folder	examples/drivers/mcasp/mcasp_playback

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)
• Connect the MIPI header on AM273x EVM to audio daughter card with SAMTEC cable
• Connect audio devices as mentioned in the introduction
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run

See Also

MCASP

Sample Output

Shown below is a sample output when the application is run, Please note that application prints in both CCS and UART console. In UART console you need to enter 8 characters.

CCS Console:

[MCASP] Audio playback example started.
Enter your response on UART terminal
Stop the demo? (y/n) :

UART Console:

[MCASP] Audio playback example started.
Enter your response on UART terminal
Stop the demo? (y/n) : y