Posted on September 01, 2016 at 17:58Hi all,
thanks for your replies. Yes I use files generated by CubeMX, I use a custom board and no dedicated Vbus pin is available on STM32F072 (I use it as a self-powered slave device)
I give an update: Finally, the main issue is the STM32F072 always handling a ESOF and ERR flag interrupt if device is unplugged. I just disable (comment) the handling of theses flag in the ''HAL_PCD_Init'' init function and ''HAL_PCD_IRQHandler'' interrupt handler (in stm32f0xx_hal_pcd) because no callback management is done for these event. I should'nt modify an HAL layer file but this workaround solve this problem....
==> init:
/*set wInterrupt_Mask global variable*/
wInterrupt_Mask = USB_CNTR_CTRM |
USB_CNTR_WKUPM |
USB_CNTR_SUSPM |
//USB_CNTR_ERRM | // This line commented solve problem of USB_IRQHandler loop if device in unplugged at bootup...
//USB_CNTR_ESOFM | // Idem...
USB_CNTR_RESETM;
/*Set interrupt mask*/
hpcd->Instance->CNTR = wInterrupt_Mask;
==> handler:
if (__HAL_PCD_GET_FLAG (hpcd, USB_ISTR_WKUP))
{
hpcd->Instance->CNTR &= ~(USB_CNTR_LPMODE);
/*set wInterrupt_Mask global variable*/
wInterrupt_Mask = USB_CNTR_CTRM |
USB_CNTR_WKUPM |
USB_CNTR_SUSPM |
//USB_CNTR_ERRM | // This line commented solve problem of USB_IRQHandler loop if device in unplugged at bootup...
//USB_CNTR_ESOFM | // Idem...
USB_CNTR_RESETM;
/*Set interrupt mask*/
hpcd->Instance->CNTR = wInterrupt_Mask;
HAL_PCD_ResumeCallback(hpcd);
__HAL_PCD_CLEAR_FLAG(hpcd, USB_ISTR_WKUP);
}
Fred
