Gaoyun FPGA prompts "There are total 703 unrouted nets" when compiling

littleshrimp

Gaoyun FPGA prompts "There are total 703 unrouted nets" when compiling [Copy link]

 

I added the EMPU_M1 soft core to the sipeed lcd_led example. Only the CAN peripheral is used in the soft core. When compiling, it prompts "There are total 703 unrouted nets". This is the only error. I am not sure what the reason is, and I have not found any relevant content on the Internet.

littleshrimp

I created a new project with only EMPU_M1 and enabled only the CAN peripheral. The same error message appeared, but the numbers were slightly different.

littleshrimp

After replacing CAN with UART, the compilation speed is much faster and no errors are prompted. Could it be that CAN takes up too many resources?