AN3997

How to use the audio playback and recording application

Doc ID 022390 Rev 1

13/15

1.

Program the firmware upgrade application in the internal Flash memory

2.

Open the project (under Project\Audio_playback_and_record) with a toolchain of your

choice

3.

Select "MEDIA_IntFLASH" or "MEDIA_USB_KEY" workspace depending on the mass

storage media memory used.

4.

Compile, load it into target memory and run it.

Another option is to use the embedded Bootloader or any in-system programming tool to

reprogram this application easily.

●

Use STM32F4-Discovery_Audio_USB_V1.0.0.hex or STM32F4-

Discovery_Audio_IntFLASH_V1.0.0.hex with any "in-system programming tool" such

as STM32 ST-LINK Utility

●

Use STM32F4-Discovery_Audio_USB_V1.0.0.dfu or STM32F4-

Discovery_Audio_IntFLASH_V1.0.0.dfu with "DFUse\DFUse Demonstration" tool

For more details please refer to section 4 of UM1467.

If you select "MEDIA_USB_KEY" configuration, you should proceed as follows:

1.

Load a wave file to the root of a USB key, this file should have the format described in

Section 2.3.1: Playback from USB key.

2.

Plug the USB key into the STM32F4DISCOVERY board through 'USB micro A-Male to

A-Female' cable (connector CN5)

3.

Then follow the description provided in Section 2.2: Firmware driver description