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April 2009 Doc ID 15349 Rev 2 1/15
AN2931
Application note
Implementing the ADPCM algorithm
in high-density STM32F103xx microcontrollers
Introduction
This application note describes the ADPCM audio firmware codec, and provides a
demonstration firmware showing how to play ADPCM files using the high-density
STM32F103xx I
2
S feature with an external DAC.
This application note is based on “AN2739: How to use the high-density STM32F103xx
microcontroller to play audio files with an external I
2
S audio codec”. The features linked to
the SPI, I
2
S and the external DAC will be skipped here because they are already explained
in AN2739. It is therefore highly recommended to refer to AN2739 to fully understand this
application note.
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