Description
Due to a problem in the Quartus II software, when compiling a design with the System Level Solutions' USB 2.0 host controller IP, you may run into an error indicating the files
u20hc_Tran_FIFO_1.v and u20hc_Tx_Rx_RAM.v are missing.
Resolution
To work around this problem, open the file sls_avalon_usb20hc_hw.tcl in the directory <Quartus II installation>/ip/sls/usb20hc/hardware/component/. Edit the following two lines:
add_file "hdl/u20hc_Tran_FIFO_1" {SYNTHESIS }
add_file "hdl/u20hc_Tx_Rx_RAM" {SYNTHESIS }
to include ".v" after the file names. The edited lines should look like this:
add_file "hdl/u20hc_Tran_FIFO_1.v" {SYNTHESIS }
add_file "hdl/u20hc_Tx_Rx_RAM.v" {SYNTHESIS }
This problem is scheduled to be fixed in a future release of the Quartus II software.