cancel
Showing results for 
Search instead for 
Did you mean: 

STM32F7: irq flood when using USB HS core in FS mode

js23
Associate III
Posted on July 15, 2016 at 15:26

I just used the USBD_MSC sample from the cube with the F7 Discovery board and configured the HS core to run FS speed only (our own hardware will have no ULPI), therefore changed usbd.conf.c, line 382:

  hpcd.Init.speed = PCD_SPEED_HIGH_IN_FULL;

Everything seems to work well, but enumeration is really slow, it takes approx 20s until the device is visible after USB is connected to the PC. Again it is the case that around 60000 irqs occur during that time. It reminds me of the known bug in the OTG lib.

Is the problem stil existing in the USB HAL drivers?

Regards,

Johannes

0 REPLIES 0