# PCB button1, button2
        Resource("button", 0, Pins("2", dir="i", invert=True),
                 Attrs(IO_STANDARD="SB_LVCMOS33", PULLUP=1)),
        Resource("button", 1, Pins("3", dir="i", invert=True),
                 Attrs(IO_STANDARD="SB_LVCMOS33", PULLUP=1)),