https://bbs.elecfans.com/jishu_1949548_1_1.html
如果是从spi flash启动的话，需要提高SPI的速度，具体做法就是在约束里面增加语句：
set_property BITSTREAM.CENERAL.COMPRESS TRUE [current_design] set_property CFGBVS VCCO [current_design] set_property CONFIG_VOLTAGE 3.3 [current_design] set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design] set_property CONFIG_MODE SPIx4 [current_design] set_property BITSTREAM.CONFIG.CONFIGRATE 50 [current_design]
#vivado管脚约束XDC文件 #FPGA_CLK set_property PACKAGE_PIN H16 [get_ports CLK_i] set_property IOSTANDARD LVCMOS33 [get_ports CLK_i] #rst_n set_property PACKAGE_PIN T19 [get_ports RSTn_i] set_property IOSTANDARD LVCMOS33 [get_ports RSTn_i] #LED_o set_property PACKAGE_PIN J16 [get_ports {LED_o[3]}] set_property IOSTANDARD LVCMOS33 [get_ports {LED_o[3]}] set_property PACKAGE_PIN K16 [get_ports {LED_o[2]}] set_property IOSTANDARD LVCMOS33 [get_ports {LED_o[2]}] set_property PACKAGE_PIN G15 [get_ports {LED_o[1]}] set_property IOSTANDARD LVCMOS33 [get_ports {LED_o[1]}] set_property PACKAGE_PIN H15 [get_ports {LED_o[0]}] set_property IOSTANDARD LVCMOS33 [get_ports {LED_o[0]}]