Hello All,
Need your support regarding flushing of RX FIFO buffer in STM32H747.I am using a barcode reader which is connected to USB HS port . And i want to clear the received data from the buffer at particular instance. And after that instance want to read the buffer again. Can anyone please suggest how can i do it.
I have tried multiple method ,and i have mentioned all of them below:-
1. Using Inbuild function in STM32 USB Library file.
USB_FlushRxFifo(hhcd_USB_OTG_HS.Instance);
2.Masking the RXFLVLM bit from GINTMSK Register.
hhcd_USB_OTG_HS.Instance->GINTMSK &=~ ((0x1UL << (4U)));
3.Disabling the GINTMSK bit in GAHBCFG Register
hhcd_USB_OTG_HS.Instance->GAHBCFG &=~ ((0x1UL << (0U)));
4. Setting Core soft reset bit in GRSTCTL
hhcd_USB_OTG_HS.Instance->GRSTCTL |= USB_OTG_GRSTCTL_CSRST;
5. Deiniting & initing the USB device using inbuild functions from STM32.
USBH_DeInit(&hUSBHostHS);
USBH_Init(&hUSBHostHS, HID_USBH_UserProcess, HOST_HS);
the only method which worked was method 5 but it is taking longer than expected duration.
Can any body suggest is there any other way to Flush the RX fifo Buffer.
