Investigate the DSP core in STM32F4

[ghost]

We should know the DSP core in STM32F4 chip and how to use it to play MP3 files. There are some documents and libraries in the internet.

*. STM32F4 DSP and standard peripherals library http://www.st.com/en/embedded-software/stsw-stm32065.html

• [x] Investigate the DSP core
• [x] Investigate DSP core standard library software
• [ ] Create related tickets

[ghost]

I found the useful reference source codes that play MP3 using STM32F4 Discovery board. http://vedder.se/2012/12/stm32f4-discovery-usb-host-and-mp3-player/ I've compiled successfully after modifying Makefile and attache here the reference codes.

STM32F4_USB_MP3.zip