Redesign a schematic (MP3)

[aabba.1]

Hi,

I need to modify this schematic, I want to use one USB connection connected to an STM32.

- When the STM32 is on Bootloader mode, A virtual com port will be open and I should have an option to save a mp3 file inside the external flash (GD25P32)
- When the STM32 is on App mode, I should be able to play some audio.

Is this possible? (Right now on this schematic the USB is connected to the WT2003 chip)

https://cdn.sparkfun.com/assets/7/c/0/c/6/WT2003S-16S_Chip_V1.03.pdf 

[Tesla DeLorean]

You can do whatever you code for. You can make it appear as a CDC or MSC, or both..

[AScha.3]

Hi,

why not use the "standard mp3 module" , that can play mp3 ... ?

[aabba.1]

I don't want to use a uSD to store my file.... I prefer to use a external flash

[aabba.1]

Do I need to configure the STM32 with 2xUSB or just 1xUSB (Can I use the same pin) or for every application (CDC, MSC) I need different pin?

[Tesla DeLorean]

1xUSB Composite Device

Like the ST-LINK/V2-1 which provides 3x device

[aabba.1]

Just to make sure I should configure the stm32 as 1x host MSC and 1x device CDC

[AScha.3]

So take a module with flash... 🙂