can't use pin 27-34 as IO

sipeed / Tang-Nano-Doc

Document for Tang Nano FPGA board

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can't use pin 27-34 as IO #5

Open reinholdPL opened 4 years ago

reinholdPL commented 4 years ago

place & route shows following message:

Warning (PR2028) : The constraint location is useless in current package. Warning (PR2017) : 'spi_clk_ibuf'(INS_IBUF) can't be placed according to Constraint, because the Constraint location is a Dedicated Pin.

newmanclimb commented 4 years ago

Today encountered exatctly same problem. Founded solution here:

https://en.bbs.sipeed.com/t/topic/1801

Project -> Configuration -> Place&Route -> Dual-Purpose pin

Turn on "Use SSPI as regular IO" and "Use MSPI as regular IO"