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sf_audio_playback_hw_i2s Module Guide Resources

Last Updated:02/28/2018

Question:

Where can I find the references to module guide resources for the Audio Playback Hardware I2S Framework  module on sf_audio_playback_hw_i2s?

Answer:

Information on the module guide itself and the associated resources and known issues are available here.

Introduction

The Audio Playback I2S Framework module provides high-level APIs for Audio Playback applications and handles the synchronization needed to play 16-bit pulse-code modulation (PCM) samples. The Audio Playback Framework uses the I2S, Timer (AGT or GPT) and Data Transfer (DMA or DTC) peripherals on a Synergy MCU. A user-defined callback can be created to respond to the need for additional data.

The Audio Playback Hardware DAC Framework module supports the following features:

  • Plays long buffers by splitting the data into manageable chunks.
  • Repeats playback until a ThreadX timeout (for repeated audio like sine wave tones or looped background music).
  • Requests next data using callback after last buffer playback begins.
  • Software volume control.
  • Pauses and resumes functions.
  • Scaling to move signed 16-bit PCM data into range of the unsigned 12-bit DAC.
  • Basic mixing for multiple streams.

Module Guide

The Audio Playback Hardware I2S framework module guide is targeted for SSP 1.2.0 and above and the SK-S7G2 Kit.

There is currently no Module Guide for this module.

Module Guide Resources

The following application projects are available from the Renesas web site at the referenced url.

  • Renesas Synergy™ Project DK-S124 Simple Record/Playback here.
  • Messaging Framework Module Guide - Application Project here.

The SF Audio Playback Framework module is used in the Developer Examples available for the DK-S7G2. You can find a Knowledge Base article that describes the Developer Examples and how to use them here.

Known issues

  • Refer to the most current SSP release notes for any known issues.
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