Application examples

AN3126

18/24

Doc ID16895 Rev 2

2.2

Using the DAC to implement an audio wave player

2.2.1

Description

The purpose of this application demo is to provide an audio player solution for the STM32

microcontroller for playing .WAV files. The approach is optimized to use a minimum number

of external components, and offers the flexibility for end-users to use their own .WAV files.

The audio files are provided to the STM32 from a MicroSD memory card.

Figure 15. Flow of data from MicroSD Flash memory to external speakers

The audio wave player demonstration described in this section is a part of the

STM32100B-EVAL demonstration firmware. You can download this firmware and the

ai18314

TIM6

DAC

DMA

CPU

SPI

RAM

.WAV