Hello to everyone,
I've been searching in the web to find and example of this typicall aplication of reporducing MP· files from a USB stick, with the stm32f4 discovery board.
At first I found the code (STM32F4 Discovery USB host and MP3 player | Benjamin's robotics ) but I work with keil and I didn't succes to make it work with Keil.
Looking harder I've found and example with keil. 日々の工作（メモ）: 【STM32F4】MP3の移植中(2) ～とりあえず終了まで
The explanations are in japanese so I had to translate them with google. And even I followed the instructions of the programmer:(
which are: comment AUDIO_MAL_MODE_NORMAL and uncomment AUDIO_MAL_MODE_CIRCULAR in stm32f4_discovery_audio_codec.h file
and also: uncomment AUDIO_MAL_DMA_IT_HT_EN in the same file )
I can't make it works.
The japanese code breaks(HardFault_Handler) in the mp3.dec file, in the function 'HMP3Decoder MP3InitDecoder(void)' after executing the AllocateBuffers
Anyone could help to make it work?
Thanks in advance