STM32F4-Discovery Audio playback and record example USB problem

[eldarsabanovic]

Posted on April 20, 2012 at 16:43

Hello,

I am beginner with STM32F4-Discovery. I loaded some examples to flash, all worked, but can't play ''audio.wav'' wave audio file from USB key nor record ''rec.wav'' with ''audio player and recorder example''. Program goes over USBH_Process(&USB_OTG_Core, &USB_Host) in main.c, and cycles here forever, no blue led ligths up, no sound, no switch to recording mode. It seems like something wrong with usb flash connection initialization, because USBH_Process function in usbh_core.c repeats at ''volatile USBH_Status status = USBH_FAIL'' after ''case HOST_ERROR_STATE:''. How I can fix this, or what I did wrong?

[Tesla DeLorean]

Posted on August 27, 2014 at 14:22

I think this is a common issue in Eclipse.

The commonality I'm observing is individuals picking tools they don't understand sufficiently, trying to port code into those tools without a good grasp of how the project is constructed in any other tool. I suppose one solution is to bang heads together until it works, but I'd usually do logical analysis. Do you have MEDIA_USB_KEY defined and passed to the compiler command line? This would be required for USB_OTG_Core to defined in main.c

#if defined MEDIA_USB_KEY
USB_OTG_CORE_HANDLE USB_OTG_Core;
USBH_HOST USB_Host;
#endif

[rajrahulonline]

Posted on August 28, 2014 at 08:48

Thanks Clive1

My Code is Working now..:):)