STM32F4 discovery audio example with CS43L22 audio DAC

Location:https://github.com/theCore-embedded/example_cs43l22_audio External HW:UART-to-USB converter attached to the USART3, headphones

Supported targets (boards)

Target name	Configuration file	Description
stm32f4_disc	stm32f4_discovery.json	STM32F4 discovery board

Wiring

1. Attach any preferable UART-to-USB converter such as this module according to following pinout:

   PD8 (USART3 TX)	module’s RX
   PD9 (USART3 RX)	module’s TX
   GND	module’s GND

Preparing

1. Install and initialize theCore (if not done previously):

   pip3 install tcore
   # Or if python3-pip is default: pip install tcore
   tcore bootstrap
   

2. Download the example:

   tcore init --remote https://github.com/theCore-embedded/example_cs43l22_audio
   cd example_cs43l22_audio
   

Building

Run compile command using theCore CLI:

tcore compile --target stm32f4_disc

Running

Firmware will be flashed via openocd debugger and flash command.

1. Connect stm32f4 Discovery board to USB cable and connect USB <-> UART converter to the PC.

2. Launch minicom with device associated with USB <-> UART converter. (/dev/ttyUSB0 here used as an example):

   # From new terminal
   tcore runenv "minicom -D /dev/ttyUSB0"
   

   Or the same, but with superuser permissions:

   # From new terminal
   tcore runenv --sudo "minicom -D /dev/ttyUSB0"
   

3. Determine stm32f4discovery board revision.

   If you don’t remember your board revision, check FAQ section How to check STM32F4 Discovery board revision?.

4. Launch flash command in separate terminal, as shown below.

   For old STM32F407G-DISC boards, with STLINK/V2:

   tcore flash --sudo
   

   For new STM32F407G-DISC1 boards, with STLINK/V2.1:

   tcore flash --sudo --debugger-config stlink-v2.1
   

5. Attach headphones to the audio jack on Discovery board.

6. Wear your headphones and enjoy.

Expected output

In minicom you should be able to see:

Welcome to theCore
Playing audio sample...

In headphones you should hear cool 8-bit sound.