Hi together,
I'm trying to make a basic USB audio speaker from STM32H747 DISCO board with Cortex-M7.
I start a new CubeMX project for this board, add in the USB_HS and audio drivers on default settings.
Once I do this, the Windows 10 machine will see the device and allow you to select it as an audio output.
I can see AUDIO_Init_HS is being called correctly.
However, USBD_AUDIO_DataOut which should be called when audio data is received from the host, is not being called at any time.
Even lower layer USBD_LL_DataOutStage and HAL layer HAL_PCD_DataOutStageCallback functions are not being called.
I study H7 USB DMA issues, and try to fix RAM and FLASH .ld files as referred links, but not work.
https://community.st.com/s/article/how-to-enable-dma-in-usb-with-stm32h7-devices
https://community.st.com/s/article/FAQ-DMA-is-not-working-on-STM32H7-devices
https://community.st.com/s/question/0D53W000015bY9fSAE/problem-with-stm32h747-hs-usb-dma
https://community.st.com/s/question/0D50X0000AAHMmPSQX/stm32h7-usb-audio-difficulties
If anyone can help this issue, that would be a great help.
Many thanks,
Jerome
* Once click "Test(T)" button, the audio stream would be suspending immediately and not able to play.
